This chart is particularly useful when used in conjunction with an engine’s power and torque data – showing what the rpm drop is in each gear when shifted at a specific engine rpm. 00 Formula to calculate Gear Ratio based. 1:1 • You. ), full performance and economy data, or to compare up to 5 cars side-by-side - click one of the the buttons below:. 76 came behind 327's and bigger engines, the 1. Ratio of the highest gear of your setup. No matter what make and model you drive, your speedometer is definitely off. Click on Calculate. Sonnax offers top-quality planetary gear sets and assemblies in four ratios and three performance levels for GM Powerglide transmissions. My question is, Has anyone changed the ratio on their bike? I mostly do fast open desert, track, technical riding. The big difference is the first-gear ratio. The vehicle may also speed to high revolutions per minute while in neutral or without the vehicle speeding up or spontaneously slip out of gear. In this example, 1st gear ratio would be 2. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. Drive Gear Teeth - The Number of teeth for the transmission; Rear End - Rear Gear Ratio (3. Any info would be very helpful and greatly appreciated. I want to put in in an open wheel modified racecar. See the chart below the table for typical ratios. Rather than change that to something closer to a 4. Click here for more information!. while having the posi is cool. 00 SUPER SET PLANETARIES. Working out the tooth counts for planetary gears is actually not that complicated, so I initially neglected to mention how to do it. The exception to gear stretch in this case, is never to stretch your last gear more than halfway to the left, as it will cause extreme gear lag and drop you into low RPMs. Final Transmission Ratio 3. The aluminum Powerglide, at less than 100 pounds, is ideal for racing applications. Gear Ratio Calculator. For example, at 34-tooth chainring and 17-tooth rear cog have a 2:1 gear ratio. Solve for your Tire Diameter. The Pinion gearbox calculator helps you to choose the ideal gearbox tuning. Complete the fields in yellow in the first column, then click "Calculate". 99" overall length Used with early electronic speedometer pickup. Buschur Racing's Powerglide Adapter. If this is a nitrous car, you gear it to make it manageable on the starting line and the ratio is what it is. Great truck. The crawl ratio is the number of rotations your engine makes before your tires make one full turn. net website for your personalized autographed copy. It is a fairly simple exercise but it has some twist. Co-authored with Rick Nelson of Musclecar Restoration & Design. Small gear with shaft - plastic black 23T 3860346 03-121 Small gear with shaft - plastic yellow 24T 3860347 03-122 Large gear with shaft - plastic green 34T 9774413 03-124 Small gear with shaft - plastic orange 25T 3860348 03-125 Large gear with shaft - plastic orange 35T 9780387 03-128 Large gear with shaft - plastic natural 36T 1359270 03-132. A 3:73 is a good gear IF you have a powerglide, or a manual with a poor 1st gear. If you have problems with larger/smaller diameter tires, use a gear calculator, ( The MGB Experience: Tire/Gear Calculator) then use that as your final drive ratio to get the right gears. Your gear ratio determines how many potential skid patches your tire will have. Circle Track Series Powerglide Transmissions We are pleased to announce the immediately availability of our new Circle Track series of Powerglide transmissions! These transmissions feature low gear only, and must be used with a functional torque converter. One of the planetary gearsets from our transmission has a ring gear with 72 teeth and a sun gear with 30 teeth. The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - each gearbox has a number of different sized (and colour coded) gear combinations available to suit nearly any combination wheel and differential variations. Final gear is the gear inside your transmission on a rear wheel drive car. How To Choose The Gear Ratio Based on Speed When selecting a Gear Ratio, you need the following information: 1. He had to work his butt off to beat the Chevy small-blocks in his class. 06 low gear can be desirable for some, but it then goes to a "Powerglide" low gear ratio for second gear. A question that I often get is how to work out planetary gears using the gear template generator. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. your obviously going to need to consider tire diameter, rear gear ratio and transmission gearing, generally your want the first gear in the transmission multiplied times the rear differential gear ratio to fall in the 10:1-10. Frankly, this is a "less than optimum" case of backwards engineering, so the outcome will not be maximum for the power/weight available. It was used in the 1991-1998 ZJ Grand Cherokee. Mike Ernst Assisted By Pete Vanish A well-known Corvette parts dealer recently called and said, "I have a customer who needs a 1962 Corvette Powerglide. Use the RPM calculator to determine what RPM your engine will run based on gear ratio, tire diameter, transmission and MPH. Enter the tire size diameter and the target vehicle speed in MPH. 84 without loss of top end. Solve for your Transmission Ratio. By the Numbers. The overall demultiplication of multi stage planetary gear units is calculated by multiplying the ratios of the single stages. Produced in low volume from 1968 to 1971, the M22 earned the nickname “Rock Crusher” because its straight-cut gears made a distinctive noise while driving. Here are a few calculators that may be useful in deciding tire size, gear ratios, and other stuff. 1972 Chevrolet C10 2wd tires. Suspension features include a DSE mini tubed rear, DSE hydroformed powder coated front subframe, DSE QUADRELink powder-coated rear 4 Link suspension, Double Adjustable front and rear Coilovers, and a Chevy 12 bolt Posi rear end with a 3. Choice of 9310 Chromoly 1. Gear Ratio Calculator Select transmission from the drop down list or, if it's not in the list and you know the gear ratios of your transmission, enter them. For any questions or observations regarding this tutorial please use the comment form below. These gearings are arranged in sets. Lenco offers an extensive variety of transmissions. By multiplying these three ratios you come up with a 2. 13 to 1, help to get the car moving. to a numerically higher rear gear to improve your 60ft. MT 28125 - 1. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. If your engine is a potent low-end engine, you'll give up a good chunk of driveability for just a little extra acceleration. Corvette Top Speed and performance information on all years and Video!. Enter the tire size diameter and the target vehicle speed in MPH. It is a good idea to replace your speedo drive clip each time the gear is removed. Looking for Saginaw Gear online? Discover Saginaw Gear on sale below with the biggest variety of Saginaw Gear anywhere online. The internal gear ratio for each gear of all types of gearboxes is already defined in our calculator. 82 gear ratio. Powerglide Adaptor Plates Bands and Band Apply Hardware Bushings and Bearings Cases Extension Housings and Components Dip Sticks and Tubes Filters Friction Plates Gaskets and Rubber Components Gear Sets Governor Support/Rear Pump and Components High Clutch Drum and Components Input Shaft Metal Clad Seals Miscellaneous Items. Identifying 1956 TO 1967 Corvette and Chevrolet Powerglides (and 1956 to 1962 Shift patterns) 1956-1967 CORVETTE POWERGLIDE TRANSMISSIONS By Rev. Although neither remains in production today, they are still heavily used on the drag strip circuit as replacement transmissions for 1960s and 1970s vintage cars. See the chart below the table for typical ratios. These's no need for that many sprockets at the rear wheel. This is not a N/A motor with a 300 rpm powerband, that you have to stay in. Was this site helpful?. 00 Paddle Tires. ) Any help is appreciated. For the higher horsepower applications the automatic transmission and converter combination is more often than not more durable and reliable than the clutch and standard gear box combination. Crawl Ratio Calculation Basics. These adapters were used by GM for high (numerically like 4. Suspension features include a DSE mini tubed rear, DSE hydroformed powder coated front subframe, DSE QUADRELink powder-coated rear 4 Link suspension, Double Adjustable front and rear Coilovers, and a Chevy 12 bolt Posi rear end with a 3. Required fields are marked *. This chart has been revised with actual ratios. The ring gear; Each of these three components can be the input, the output or can be held stationary. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. Planetary gear ratio calculations This article also available in Spanish. A gearbox is a mechanical device utilized to increase the output torque or change the speed (RPM) of a motor. Powerglide Steel 1:80 Ratio Straight Cut Planetary Gear Set Product #2540S - Planetary gear set with all pinion gears, center gear, auxiliary gears and flange gear are housed in a steel carrier. Welcome to rushgears. This powerglide transmission is designed for high horsepower applications in vehicles that require the "standard" or "shorty" length. The ratio is calculated by multiplying your transmission, transfer case, and ring and pinion gear ratios. 12 by your Jeeps tire diameter (Example:. Turns out, there's a. com Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches. T56 use continued like this until 1997 when it also. Drag gear racing ratio that work Posted on October 6, 2010 by geabthoughlandse. Currently it has the straight 6 with a powerglide and 3. Thank you for your professionalism and to all the rest of your team, Jim, Polly, Darryl and Randy, the technician who came out from his home on a sunday to help us with a minor issue. For example, let's say your car has 600 ft. A Powerglide transmission in combination with a numerically high gear ratio is a good choice for quarter-mile cars or performance engines that live in the upper rpm limits, and also for street-worthy muscle cars that have very broad power bands. Chevelle Data and ID Guide 1964-1972 available at many online locations including my ChevelleCD. I have used that a fair bit to help guys work out gear, wheel and tyre combinations for race use. I need to increase my trap rpm to 6800 to 7000. The ratio of 2nd gear in this example would be. Anyways, stock gear ratio on the rear sprocket is 48 teeth. Emergency Service. Engine RPM at Cruise Speed Example: If you want to Cruise at 60 MPH at 2000 RPM and your Tire Diameteris 30", the Gear Ratioyou need is a 3. 88 final gear ratio. Ring Speed. Chevrolet Transmission Dimensions Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. Today, Hurst continues to develop industry leading performance products and carry out George’s original vision. These calculators work because they know the distance, they know the applied horsepower (they assume it is constant), and from that they can calculate speed and elapsed time. 91 step up the rear gear ratio to say 3. The 4L80E keeps doesn't drop the engine rpm as much between shifts because it is a heavy duty transmission and assumes that you could very well be pulling a load. Im running a 4/10 mile high bank track dirt of course i have a powerglide tranny should the rear end gear be about a 5. Just as different stall speeds are recommended for different engine torque ratings, items such as rear differential ratio, body weight, tire size and compound used, type of racing you are participating in (or if you are just looking for better street performance or better low-end torque for towing situations) and transmission shift ratios all. A question that I often get is how to work out planetary gears using the gear template generator. 125" in length. Of course, that 3. Rear Axle Assembly Codes The rear axle ratio may be determined by finding the two- or three-letter serial number prefix in the following table. The starting-line ratio is a combination of the first-gear transmission ratio multiplied by the rear-end gear ratio. I'm changing the gear ratio from 3:08's to 3:73's and would like to change the speedo gear to reflect the correct mph. NEW BTE Top Dragster Racing Powerglide Transmission 1. All combinations feature a 1:1 high range gear ratio for high speed or daily driving. Early Powerglide / 3 speed standard Speedometer Driven Gears. So you had 3. Example: 2. Check out our Conversion Software for Windows. ln general, all Lenco transmissions are a planetary design. 82:1 Low Gear Ratio Item # 742018 TCI® Circlematic™ Transmissions have built an impressive reputation with stock car racers for winning races and delivering amazing durability. PowerGlide Magazine, Shell, Gear Ratio Calculator, Bowhunting. Listed 1967 "AQ" and "AR" codes & ratios may only have been used early in the 1967 model-year, or not at all. Comes in 20, 21, 22, 24 and 25 tooth. Small-block Chevy is definitely the ticket to dependable power on demand. The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - each gearbox has a number of different sized (and colour coded) gear combinations available to suit nearly any combination wheel and differential variations. Different-ratio first-gear sets are now available (through TCI Automotive, JW Performance Transmissions, and others) for the Powerglide transmission. Second gear ratio is 1. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. Lenco offers an extensive variety of transmissions. How you can see in the following image:. no need to enter anything in '6th' gear for a car with only 5 speeds). 82 Standard material$395. He had to work his butt off to beat the Chevy small-blocks in his class. Super Max 3 Speed Gear Ratios. 82 first in 6 cylinder cars. These's no need for that many sprockets at the rear wheel. These calculators are designed to give the approximate engine RPM (revolutions per minute) based on the ring gear and pinion gear ratio, the height of the tires (diameter from ground to top of the tire while mounted on the vehicle) and the transmission final gear ratio. 125" in length. Our nitrous powered 4L60E 2010 Camaro. The M22 is a strong and reliable gearbox. i would have to shift about 30 ft out to keep from over reving the motor. Identification: The SM465 can often be confused with an SM420 to the novice eye. Horsepower Calculator; Worm Gear Torque Ratings; Ratio & Center Distance; Request for Quote & File Upload; Standards & Toloerances; Gear Tooth Dimensions; Gear Types. A vehicle with a manual transmission may have difficulty going into gear when transmission fluid is low. 69:1 gear ratio that's ideal for today's big-cubic-inch motors. Powerglide Adaptor Plates Bands and Band Apply Hardware Bushings and Bearings Cases Extension Housings and Components Dip Sticks and Tubes Filters Friction Plates Gaskets and Rubber Components Gear Sets Governor Support/Rear Pump and Components High Clutch Drum and Components Input Shaft Metal Clad Seals Miscellaneous Items. Solve for your Crawl Ratio. This transmission was very popular and considered one of the best of ever produced. People who are buying a used vehicle, or shopping for an axle from a junk yard, frequently need to know what the ring and pinion gear ratio is in the axle's differential, as well as whether or not the axle has some sort of traction control device like a limited slip, locker, or spool. Let's calculate some easy examples of this. my choice was between gearing the rear higher or switching to a powerglide. Split Ring Compound Planet Epicyclic Gearing is an awesome arrangement of gears that let you have really high gear ratios in just two stages of gearing. I am looking to go to 33x15 tires and a 488 or 513 gear , but need to know how to calculate what my rpm will be with gear changes. 0 in 2nd, and 1. The PCM also monitors the turbine and output speed sensors to calculate gear ratio and the Transmission Range Sensor for gear selection. I race on a 3/8th mile track, have a stock 350 with a. Second gear ratio is 1. 00 Formula to calculate Gear Ratio based. 18 Vasco gear sets. Operation of Hydraulic Controls When Shifting Out of Direct Drive. Gear Ratio And Tire Size Calculator When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. Solve for your MPH. Instructions: Use this calculator to estimate various aspects of your performance. speed as you go through the gears. 30 gear with our 31" tire. 1)the tires are the IMCA McClearys also would that gear also work for a 3/8 track running glide in low. It would likely use a 3200-3500 stall converter, like PN109-603, to get the best performance. 10 with a 28" tire. Same ratio as a TH350 and X. 82 Standard material$395. anyways, i was wondering, with a 383 stroker engine, what would be an ideal gear ratio for the rear end matched with an m-22? i would like to be able to use alot of the torque that the engine provides. How you can see in the following image:. 69 ratio powerglide gear set for shorty transmissions. Planetary gear ratio calculations This article also available in Spanish. Powerglide two speeds came with 1. (Note: The calculator converts under the assumption that one unit of the gearbox is fixed (sun, planet carrier and annulus gear), therefore does not rotate). A gearbox is a mechanical device utilized to increase the output torque or change the speed (RPM) of a motor. 69 ratio powerglide gear set for shorty transmissions. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. 11 rear would give you 10. For the 2 speed model case, you have five available low gear ratios, three of which are available as competition grade cases. The tranny shop I deal with has all this info in a book. RE: How do I find out the gear ratio for a powerglide transmission? I think it came off a 60's era chevelle. For example, let's say your car has 600 ft. The rear independent suspension and high gear ratio matched with the 4 speed manual really make this a fun car to drive even by today’s performance standards. A two-stage planetary gear stage is defined using the program. The Fastest Made to Order Custom Rears and Axles Moser has been leading the competition since 1986 and continues to provide industry leading products. This is a much lower ratio than what was common, and provides good acceleration from a stop and is also good for off-road driving. Timing that perfect upshift can take a lot of practice, but when you do it right, the satisfaction is like nothing else. Spur Gears; Worm Gears; Helical Gears; Splines & Shafts; Worms; Bevel Gears; Miter Gears; Change Gears; Spiral Bevel Gears; More Custom Gears; Services. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. 7 probably won't help that much with your tiny for a truck tires though. 74-to-1 and a second gear ratio of 1. The gear ratios on a OE Powerglide are 1. Thanks again to all that posted. 30's will put you at 6000 crossing the traps according to a calculator, but you should pull more mph so take that into consideration. If you install the Turbo Hydro trans, you could easilly switch to a 3. A friend of mine is a drag-racer, and he got into Mopar back during his stint in VietNam, sending all of his pay back to his father, to buy a 340 Duster. If your car originally was equipped with the Turboglide auto trans the standard rear axle ratio was 3. It is a calculated figure based on RPM and MPH. Q: Find the Rearend Gear Ratio Does anyone know how to find the rearend gear ratio on a 1967 firebird. We’ve found when doing conversions from stick to automatic in high performance vehicles that these cars generally drop from a half to three quarters of. This transmission was very popular and considered one of the best of ever produced. A 3:73 is a good gear IF you have a powerglide, or a manual with a poor 1st gear. My question is, Has anyone changed the ratio on their bike? I mostly do fast open desert, track, technical riding. The exception to gear stretch in this case, is never to stretch your last gear more than halfway to the left, as it will cause extreme gear lag and drop you into low RPMs. This is a much lower ratio than what was common, and provides good acceleration from a stop and is also good for off-road driving. Solve for your RPM. Please contact us if you need help calculating the proper gear set for your TH350. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. These gears are based on the lightweight OEM 6 cylinder planetaries. By multiplying these three ratios you come up with a 2. ) Tire Height - Please use Inches when measuring. 12 by your Jeeps tire diameter (Example:. Let's take a look at a single planetary gearset. 98 first gear ratio [3. In 3rd gear, with TCC fully applied, engine, turbine and output rpm will be the same. This chart has been revised with actual ratios. Calculate Clear. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. 08 is a little too high to run with the powerglide, considering that the powerglide has an extremely high "low" gear ratio (1. For more than a. This Site Might Help You. Rear End Gear Ratios except when they came with powerglide transmissions, like your father in law's car. in part, but remember it isnt just the first gear ratio, but the overall final drive ratio you need to concern yourself with. Everything from performance torque converters for drag racers, mud racers and street enthusiasts to racing transmission pumps, powerglide gear sets and deep transmission pans, you can count on FTI for all your transmission needs. One custom RWD alternative was developed by Bushur Racing in the late '90s. ) Any help is appreciated. One custom RWD alternative was developed by Bushur Racing in the late '90s. Replaces original GM part number 3987917 perfectly. 82 Low Gear ratio, Factory Output shaft, factory gears, bowl, and ring gear. Or a 1955 Chevy 2 door hardtop which weighs about 3,350 lbs. com (DBA Jam Performance Transmissions) which is a transmission company that builds and sells Tremec 5 and 6 speed transmission conversion kits. I shift at 6800. There are 'calculators' online that take your tire size, rear gear ratio, etc. In this example, 1st gear ratio would be 2. For the table with this car full photo gallery and complete technical specifications (including final drive and gear ratios, powertrain description, inside and outside dimensions etc. Choice of 9310 Chromoly 1. RE: How do I find out the gear ratio for a powerglide transmission? I think it came off a 60's era chevelle. The sport compact class will also change from 15-inch rims to 14-inch rims depending on the gear ratio and the rev limiter in the car. Enter the tire size diameter and the target vehicle speed in MPH. If you are going to use this van to tow your car with why not just go with lower rear end gears? I would think that between 3. The big difference is the first-gear ratio. Requires an HTML 5-compliant browser. A relatively narrow-tired car (each rear tire measures 11 inches or less across the tread) has a certain maximum starting-line ratio to be used based upon the weight of the car and the stroke of the engine. Here are a few calculators that may be useful in deciding tire size, gear ratios, and other stuff. 512 outside diameter gear. Powerglide & Gear Vendors Overdrive good to 2000 Horsepower. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. 69 straight cut gear sets are constructed from the finest aerospace materials to ensure the most reliable backbone for your racing transmission. Gear Ratio Calculator Select transmission from the drop down list or, if it's not in the list and you know the gear ratios of your transmission, enter them. Equation and Calculators to determine Ratios of Planetary or Epicyclic Gear Assemblies. In Drive, the C4 shifts the same as the Dual-Range at the large green dot with a normal 1-2-3 upshift program and the same gear ratios throughout. How to Calculate Gear Ratio. GM LS1 - 9 and Chrysler/Mopar Gen III. For example, at 34-tooth chainring and 17-tooth rear cog have a 2:1 gear ratio. 902 Utility Road Building #100 Sanger, Texas 76266. This calculator will graph RPM vs. If the speed difference is too great to change with the driven gears available, you will have to change the drive gear on the output shaft of the trans (requires removing the tail housing). 76 in reverse. Use this gear ratio calculator to select the best ring & pinion and gear ratio combinations to serve your needs. Easy to use parts catalog. It's equivalent to the M20 muncie with a 5. Currently it has the straight 6 with a powerglide and 3. 56 rear could go to a 5. 58 ratio Extreme planetary assembly kit 28158G-06SP delivers tunable control right at the start, when traction can make or break a race. Advance Adapter The Powerglide to Jeep Dana 300 transfer case adapter is 3. Heartbeat City stocks a full line of NOS Camaro Parts, Rare Camaro Parts, Old Camaro Parts, Reproduction Camaro Parts and hard to find Used Camaro parts for your first generation 1967, 1968, 1969 camaro. Tiffin Motorhomes, Inc. It is a fairly simple exercise but it has some twist. Higher gear ratios, such as 5. 74-to-1 and a second gear ratio of 1. If you are building a HIGH power drag car, this is the best option available. 10 with a 28" tire. Let's calculate some easy examples of this. Will not work for automatic turbo 400 transmissions. 84 without loss of top end. The small sun gear has 30 teeth and the large one has 36. Your gear ratio determines how many potential skid patches your tire will have. A burning smell is another sign that transmission fluid may be low. I promise you that the next transmission I have to replace or any other person I hear of needing a transmission I will be heavily promoting Monster Transmission and tell them that I personally use Monster Transmission. 82 ratio and was used by Holden in Australia behind their Australian built 6-cylinder and V8 engines. The basic purpose of installing a modified torque converter is to allow the engine (RPM) to increase to where the engine is making greater power before driving the wheels, thus allowing the vehicle to accelerate from a standing start much. Hurst’s latest, the Elite Series line of performance products for modern muscle cars, includes not only their world famous shifters, but also exhaust systems, wheels, springs, floor mats, and graphics. 472 112 112 1200-4700 smooth 969 n comment: good low and mid-range torque buick v8 400, 455 c. So you had 3. Option 1: Gear Ratio The first of many choices you need to make when ordering an Atlas T-Case is selecting the appropriate gear set. Let’s say an engine that produces 1,000 horsepower at 7,000 rpm is paired with a 4. Tiffin Motorhomes, Inc. If your engine is radically cammed, you’ll want to get up and stay up in the higher rpm’s – there a 3:73 is a good gear to have. Enter the tire size diameter and the target vehicle speed in MPH. FTI Offers a wide variety and ratio of Drag Racing and Mud Racing Powerglide Transmission gear sets for standard length powerglides and shorty glides. Engine RPM, or the speed at which the engine turns, can be calculated at any speed given the vehicle's tire size, axle ratio, and final transmission gear ratio. However, the rise of modern six-, seven-, and eight-speed automatics has more. Switching gears enables a wide range of vehicle speeds, depending upon the acceleration or deceleration of the engine, which is detected by the transmission via the crankshaft. 23 rear gear. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. Second gear ratio is 1. 85:1 drive ratio in 1st gear I am thinking of either going to a 3. Holden vehicles fitted with Chevrolet V8 engines used the 1. 283, 327, mild 350 CI motors and lightweight combinations usually fair very well with these ratios. Using Drag Strip Analyzer my best gearing worked out using a stock geared th350 and a 4. Lenco offers an extensive variety of transmissions. The gear ratio is perhaps one of the most overlooked aspects of modifying a car. - This low 1:80 ratio planetary gear set is excellent for racing applications and is available in standard length and shorty applications. 56 and higher gears (numerically lower) such as 2. As far as micro sprints go, on tracks about 1/3 mile and bigger, longitudinal traction is generally not much of a problem. The 1964 serial numbers are found on the bottom of the carrier. 31:1 rear end gear ratio. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. Lenco Transmission Overview. WELCOME TO WSP Wedan Performance was opened in JAN. If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk my favorite forum is 1955-1957 ( Modified / pro street / show) forum. 1)the tires are the IMCA McClearys also would that gear also work for a 3/8 track running glide in low. Ring Speed. Solve for your MPH. A 3:73 is a good gear IF you have a powerglide, or a manual with a poor 1st gear. 69:1 gear ratio that's ideal for today's big-cubic-inch motors. 00 Paddle Tires. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. 76 ratio now. New transmission speedo gear for your classic. I've got 3. For this example, let’s use an AOD. Planetary gear ratio calculations This article also available in Spanish. The 4L80E has an overdrive gear with a ratio of 0. The driven gear is positioned in a removable housing that is typically located in the transmission's tailhousing. This is a superior alternative for most cars thinking of going to a Th400. I changed the gear ratio on my 750 last year using different. If you install the Turbo Hydro trans, you could easilly switch to a 3. STREET PERFORMANCE CALCULATOR. Classic Industries offers a wide selection of Chevrolet Truck parts, including Chevrolet Truck interior parts and soft trim, Chevrolet Truck exterior sheet metal, Chevrolet Truck moldings, Chevrolet Truck emblems, Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation.