Th350 Gear Ratio

With additional reduction in first and second gear, these sets work great in all types of applications requiring additional gear for better takeoff. Gears are accomplished in all other tranny types by the application of two or more components in the transmission. 75 I didn't realize it but PATC has them too. 9 I'm at 11. 48 in a T400 or a 2. I had an 06 Silverado with the 3. Changing to a Tremec TKO 500 manual transmission—which has a 3. Material:Hardened SteelInput Shaft Style:TH350/400First Gear Ratio:2. 52 do the math. Gear Vendors Overdrive Unit, Chevrolet & GM 3 Sp Automatic Transmissions Gear Vendors Save Gas or Diesel Fuel, Extend Chevrolet or GMC TH350 and the Turbo 400 Mileage, 20% increase in fuel economy, Extend Engine Life, Start Saving Money Today!. 725 TH350 TH250 Transmission. The new Hone-O-Drive™ overdrive transmission system solves the problem of achieving the ultimate performance gear ratio combination for both drag racing and daily traffic and highway operation. A commonly overlooked component of a vehicle’s drivetrain that has a large effect on fuel economy is rear end gearing. TH350 output shaft with bearing that fits between case and ring gear Be sure you have the output ring gear to case bearing in the case. Gaskets and Rubber Components Gear Sets Governor Support/Rear Pump and Components High Clutch Drum and Components Input Shaft Metal Clad Seals Miscellaneous Items Modulator Oil Pans-Filter Adapters and Extensions Pumps and Pump Components Rebuilding Kits Reverse Clutch Components Sealing Rings Servo Pistons Covers. Information on Gear Ratios, Overall Length, Input Shaft, Weight, etc. 059:1 while the 4L80e have the gear ratio of 2. 50:1 gears and it works great. To determine the correct gear ratio of the speedometer for your car, use the following formula to calculate the number of teeth on the driven gear (round to the nearest available gear):. * SuperLight standard any gear ratio John makes, $4,495. What are specs for a 350 engine to a 700r4 toque converter to flexplate ? I’ve heard 45ft lb & 65 ft lb. Powerglide Gear Sets for 2. Notice with your rear gear in 1st-overdrive how low you would have to go in a new rear gear to make 2nd gear have that much torque multiplication. TH350/400 Governor Mods In the previous issue I explained how the governor plays the major role in determining the automatic shift points in Drive for TH350 and TH400 transmissions. The nickel content was increased to produce a harder, stronger gear. The drive gear is located on the transmission's output shaft. billet aluminum low/reverse clutch piston. If you do not know this ratio, you can simply put in 1. The 700R4 is a good transmission for a retrofit into an older car. 76 low gear, the company's custom E9310 gearset (part number HP7469L, which includes a forged carrier housing and ring gear, 9310 pins and new washers and needle bearings) and one with 4140 gears (part number HP7479L, which includes an OEM carrier housing built with new washers and needle bearings). TH700-R4's rear mount is 2" to the rear of that of the TH350 short tail. :-\ I guess it will be some time before I get my hands on a set. First gear at 2. The 700R4 goes from a 3. 74:1 First-gear ratio which is deeper than a TH350's ratio but not as deep as the TH700-R4's 3. The lockup torque converter, along with the overdrive fourth gear, was a brainchild of the oil crisis in the 1970's. 5 inch tailshaft torque converters available /// also available \\\ th350 9 inch shaft th350 4x4 th350 bop. 75 gear set is for low-HP vehicles looking to improve 60' times, and the 2. Otherwise, it is usually best to replace the torque converter with a new one or with a properly rebuilt one. 00 gearing (relative to whatever the actual rear diff ratio was) to the T’s default 2. Blackbox and Transfer case in Low 5. 90:1, and installed 26-inch tall tires. I am currently running a 3. The TH350 weighs 120 lbs. The gear ratios for the RPO M21 Close Ratio 4-Speed Manual Transmission are: 1st Gear – 2. 87 Final gear. Speedometer Gear Teeth = (Drive Teeth * Rear End Ratio * Tire Revolutions per Mile) / 1,000. 36 rear axle gear ratio coupled with the 3. 23:1, 4th Gear – 1. You can select your transmission, manual or automatic, your drive gear teeth, 6,7 or 8, pick out which gear ratio you're using and then select your tire size. At about 2600 dollars (depending on model) the GEAR VENDORS is not the cheapest way for you to get overdrive but is by far the best. Enter R&P Ratio, Tire Height, Speed (mph), and Transmission Ratio, then click Solve to calculate RPM. Gear Ratio Speed Calculator By David Nguyen Calculate theoretical speed for a car in each of its gear ratios. This auction is for 1 Old School GM speedo gear. Reason for the 2nd gear launch is because first gear, 3. The "It's All in the Ratios" chart lists all the different ratios for the various Chevy automatic transmissions from the 'Glide to the TH700-R4. In mechanical engineering, a gear ratio is a direct measure of the ratio of the rotational speeds of two or more interlocking gears. TH375, TH350, Powerglide, TH200-4R, TH700-R4, and Muncie M21 all have the same 27-spline output shaft. That is why you. The rearend is original with either 3. The M22 has higher-nickel-content gears of straight-cut design. 27 transmission first gear ratio multiplies providing a 10. And with so many gear ratio options available on the market to cater to the wide variety of engine combinations, tires, and race distances, this is a good problem to have. The 700R4 is a four speed transmission with the final gear ratio being. 4) Real world vs. I personally feel that the gear splits in a TH-700R4 are great for street driven cars as long as you don't get too crazy with the rear end gearing!. It features an integral bellhousing. Nobody guarantees a rebuild when using. Gearing (Automatic, TH350) - First Gear - 2. The steepest first gear ratio of any four-speed automatic (3. ) So getting a heavy load started is easier with the 700R4 due to the lower first gear. Transmissions after this period have a higher 5. 77 1st gear ratio, rollerized low drag planetary, deep pan, high performance intermediate band and clutches. M21 was a no-cost option but required the optional L82 engine. The NP203 and NP205 have the same reduction ratio of approximately 2. When using our sizing chart , please make sure you follow Steps 1 and 2 carefully. TH350/400 TCI 10" Streetfighter Series Product Description: Each Streetfighter torque converter is pressurized and subjected to a leak test to confirm the integrity of all weld seams. 1 - This is a retrofit gear to allow the speedometer to function with 3. 72:1 and second gear ratio from 1. 94 (basically 4:1) Overall Length of assembled 203 with NP205: 21. This has a real advantage for vehicles weighing more than 3500lbs. 55:1 rear-gear ratio, and a 20-tooth blue driven gear that's designed to mesh with 1. Gear Ratios are: First Gear – 2. 00 gearing (relative to whatever the actual rear diff ratio was) to the T’s default 2. 08 rear end (or even numericly lower) for a lower cruising speed. The 700 is 3 inches longer than a TH350. The automatic transmission might help some of the shock to the antique rear end but it would quickly crumble under the power. 52:1 for first gear, 1. That is why you. Later models used a circular style iron adapter which is generally considered the stronger of the two. Focusing on 10 tooth gear on the internet. the driven gear that is on the output shaft of the transmission, and the axle ratio of the differential. 11 ratio gear set, quick release pro tree transbrake valve body, 9310 Chromoly input shaft choice of turbo or powerglide spline, 8 clutch high gear drum with wide steel hub, Kevlar band, Torrington roller bearing, deep aluminum pan, rollerized billet aluminum governor support, billet aluminum. Axle Ratio/Tire Size Calculators **For Jeep or Chevy Technical Info see bottom of page Okay, so you've torn your pumpkin apart and have the ring gear and pinion gear teeth count. The C6 shared the exact same gear ratios, but was adorned with a series of internal and external upgrades so that it could be made to handle a lot more power and torque. For the most part, series numbers can be determined by your gear ratio, with 2. Call today for the right gear for your application. 810 18-22T. You will have a full 6 forward ratios and torque multiplication that will have even taller rear gears like 3. See results below for Camaro, 2010-Up Camaro, Firebird, Chevy II / Nova, Impala / Full Size, Chevy / GMC Truck, Mopar A, B, and E Body, Regal / Grand National, Tri-Five Chevy, Buick Regal and Ford Mustang. 06:1) in the 700R4, you are in the right place. Now I think I could live with a 3. 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. Ratio Adapter Small Part Kit You're viewing: TH350 Speedometer Drive Gears $ 12. 6L80E Transmission, Quality rebuilt at New lower price. Trans Ratio 1st: Trans Ratio 2nd: Trans Ratio 3rd: Trans Ratio 4th: Trans Ratio 5th: Trans Ratio 6th: Trans Ratio 7th:. I am pretty sure 3. Options "Special note" - The TH-200 is now available as a retrofit to use with either a TH350, TH400 or Powerglide converters with no modifications. FORD 9 INCH DIFF GEARS 3. Calculator for the right gear ratio on the speedometer. This auction is for 1 Old School GM speedo gear. A GM comparable would like a 3. 1 - This is a retrofit gear to allow the speedometer to function with 3. 00 as this is the typical 4th gear ratio of most 4 sp and 5 sp manual transmissions. The TH350 uses the standard gear ratios of 2. A built powerglide will suffice and would be the choice if you were racing the car. 90 to 1 ratio, that was common for the 2 speed automatic. 4) Real world vs. 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. Blackbox and Transfer case in Low 5. 07 first gear, as opposed to a 2. A new speedo drive clip is included. Select Aspect Ratio Select Wheel Diameter Select Wheel Diameter 23 22 21 20 19 18 17 16 15 14 13 12 10 Select Diff Ratio Select Diff Ratio 2. The TH350 uses a 66 tooth ring gear, and the 700r4 uses a 78 tooth ring gear. 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. Could be a. com FREE DELIVERY possible on eligible purchases. e4340 steel billet reinforced overdrive ring gear. Fill in all entries except the one you want an answer to (in green section). It features an integral bellhousing. This one is designed for use with all speedometer gears that have a 36 - 39 tooth count. 9 goal with those gears unless I have a tall tire, I might run a 28" tall tire to see if I gain MPH. 1) RPM when each gear shifts 2) How far below peak torque each shift puts the engine 3) RPM at given highway speed in O/D gear 4) As a rule of thumb, given the same power and axle ratio, the shorter a given transmission gear (i. GM 4L60E transmission Specs. 52 1st Gear, 1. This greatly reduces engine rpm at highway speeds and will increase fuel economy. corvette speedometer gears and sensors for all years and models Eckler's Corvettes carries everything you could need for replacement or repair of your speedometer. It is widely considered to be one of the greatest of automatic transmissions ever built. Meanwhile, the TH400 is nearly bulletproof and has better gear ratios for higher-powered cars. TH400 The TH400 automatic transmission is designed for Corvette big-blocks with engines rated up to 400 hp. Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. This means rebuilding the entire transmission from scratch. 06 comes on too fast and we cannot put the power down in that gear. 96:1 (NP205) BlackBox in Low, Transfer Case in High, 2. Gear Star offers three power-output stages for refurbished TH350 transmissions, ranging from 400 hp/400 ft-lbs of torque to 500 hp/450 ft-lbs of torque to 700 hp/550 ft-lbs of torque. The transmission mount position is also expressed from the bellhousing flange rearward to the centerline of the mount. 3-Speed Transmission Low Gear Sets ATI offers Low Gear Sets for most popular 3-speed transmissions. 960 2nd -- 1. 286 ratio brings the same close ratios found in a close ratio Muncie to your automatic. The steepest first gear ratio of any four-speed automatic (3. Options for lower gear ratios at the transmission are limited by the available gearboxes themselves (e. 87 Final gear. Transmission This adapter kit is designed for exclusive use with the GM TH350 automatic transmission. Drivetrain suggestions for NOS high RPM small block on 275's Nitrous - Induction Solutions. Tags: 200-4r 350 400 4l80e 700-r4 700r4 buick case dimensions gear gear ratio GM powerglide ratio specs th200 th200-4r th350 th400 th700-r4 trans transmission transmission case transmission gear. The TH350 is an automatic shift, three-speed transmission. 75 gear set is for low-HP vehicles looking to improve 60' times, and the 2. TH350 Automatic Transmissions in-stock with same-day shipping. StreetFighter TH350 1969-79 w/ 2. 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. If the trans died because a shaft broke, and there is no clutch material or anything in the pan, maybe you can use the old converter. TH350/400 Governor Mods In the previous issue I explained how the governor plays the major role in determining the automatic shift points in Drive for TH350 and TH400 transmissions. TH350 -- 35hp 700r4 -- 70hp 727 -- 40hp 904 -- 35hp E4OD -- 65hp If you have corrections, or gear ratios for other rear-wheel drive transmissions, please e-mail me with the info. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. This coupler / power sleeve kit will adapt a TH350 4wd automatic transmission to a GM NP205 transfer case with a 10 spline male input shaft. 72:1 and second gear ratio from 1. We have 6L80E Transmissions in stock and free shipping. I took the roadster out today for its first official shake down run. 68 overdrive ratio—would make this the perfect for performance and cruising. Includes seals/gaskets: New: $250: Buy Now: GU4012: SM465 to NP205, seal and gaskets included. IMO I would not run a numerically higher gear than a 3. THW06 660F Bearing, Rear Ring Gear. All weights are without converter and dry with stock components. The gear ratios for the RPO M21 Close Ratio 4-Speed Manual Transmission are: 1st Gear – 2. It is widely considered to be one of the greatest of automatic transmissions ever built. Borg Warner Second Design ST-10 4-Speed Info History Based on fact, rumors, internet stories, and my vague memory The history of the ST-10 transmission begins with the Borg Warner T-85 3-speed which was the basis for the Borg Warner T-10 4-speed first used by GM in 1957. 0 for 3rd gear. 50:1 gears and it works great. 73 rears in the 2. 75 gear set is for low-HP applications and Circle Track use. Performance Automatic, Max Performance Rebuild Kit, TH350 (except TH350C) GM TH350 '68-'81 (except TH350C) *Includes Vacuum Modulator: In Stock. While a vehicle with 4. Then you will have an OD gear, and this will allow you to run a shorter rearend ratio (3. 84 Ratio 1st Gear Racing Transmission 1100+ HP !. The input shaft for the 1992 Dodge NV4500 was 19 splines with a 1" diameter, like its predecessor, the Dodge NP435. Gear reduction of NP203 gearbox: 2. 11 ratio gear set, quick release pro tree transbrake valve body, 9310 Chromoly input shaft choice of turbo or powerglide spline, 8 clutch high gear drum with wide steel hub, Kevlar band, Torrington roller bearing, deep aluminum pan, rollerized billet aluminum governor support, billet aluminum. 73 non-posi 12 bolt rear end. First gear at 2. 70:1 4th gear. Standard Axle Ratio Table. THE VETTE NET - YOUR MODERN SOLUTION FOR ALL CORVETTE NEEDS. IMO I would not run a numerically higher gear than a 3. 00 I still run that tranny, just in front of the 455 now, and with 3. Converter weights will be similar for a given combination with the same size converter. 27 transmission first gear ratio multiplies providing a 10. The Turbo 400 is primarily constructed of cast aluminum, with the bell housing being integrated into the transmission and also made of cast aluminum. First and reverse are constant mesh to prevent gear clash. High Performance Racing Transmissions, Torque Converters, and Valvebodies manufactured by Automatic Transmission Design - Germantown, WI transmission shop. This gear fits chevy turbo 350 transmissions, GM powerglide 2 speeds, and 60's to 70's manual trans including muncie and Saginaw. It would be very helpful to know either how much torque these trannys were designed for or what GM engines they were used with. 00 as this is the typical 4th gear ratio of most 4 sp and 5 sp manual transmissions. 06, second is 1. 73 RATIO NOS GM OEM Rear. In between, the company says ratio steps 2-7 are “perfectly matched to make use of the engine’s strong and broad torque curve for optimal performance on or off the track. I don't know anything about the gear or what I should even do about this. 1 - This is a retrofit gear to allow the speedometer to function with 3. Know what you are doing here, or have someone who knows do it, or you'll burn the trans up quickly. i have heard that the 3rd gear is the same ratio in the th350 and the 4l60e but im not sure. Welcome to Bowtie Overdrives, home of the worlds finest GM Automatic Overdrive Transmissions. Converter weights will be similar for a given combination with the same size converter. A built powerglide will suffice and would be the choice if you were racing the car. I also have 265/75/16 on my truck. Hughes offers 4 versions of this kit, one with 1. 05 in the 1/4 but lost 2 mph over the 700r4 i was satisfied with the stock gears. 10 with a 28" tire. Correct speedo gears will allow your speedometer to read properly. corvette speedometer gears and sensors for all years and models Eckler's Corvettes carries everything you could need for replacement or repair of your speedometer. It is widely considered to be one of the greatest of automatic transmissions ever built. This calculator will provide the speed of the vehicle based on the transmission gear ratio, the engine RPM, the tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. NEWS: Our website is now running on a much faster server! Celebrate with us by entering discount code SERVER during check-out to save 8% on your web order! (offer excludes products already on sale and will only last a few days). Please contact us if you need help calculating the proper gear set for your TH350. GM/CHEVROLET FINAL DRIVE RATIOS It is the gear under your seat that counts. 52 do the math. RPM Calculator. by toyota motor corp 08/88. Installation of the correct ring and pinion gear ratio will help optimize performance, fuel economy and overall driveability. Chevrolet Transmission Dimensions Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. I currently have a Th350 in my 69 and I'm looking to pick up a muncie. Select Aspect Ratio Select Wheel Diameter Select Wheel Diameter 23 22 21 20 19 18 17 16 15 14 13 12 10 Select Diff Ratio Select Diff Ratio 2. IMO I would not run a numerically higher gear than a 3. Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your vehicle. 4) Real world vs. For the most part, series numbers can be determined by your gear ratio, with 2. Our Pro Touring turbo 400 transmission is rated to 800 horsepower. It is the ratio of an output to the input. list of modern GM rpo codes/option codes for general motors vehicles. I run a TH350 behind a 4. The speedo gear combination for a 2. I don`t know whats in it now, I think its a 3. With the setup that we have in the truck (3. These gears are an excellent alternative to steep rear end gears for street driven performance vehicles and low RPM, high torque race engines. Gear Ratios are: First Gear – 2. Changing to a Tremec TKO 500 manual transmission—which has a 3. starting line ratio 1st gear x rear gear? wouldn't this be the same for the 1/8 as it is for the 1/4. 56 gears first gear off the line and I wish I had a 13. 90 rearend gear ratios falling in the 3-Series, and 4. If you change tires and wheels on your Corvette, you may have to change the speedometer gear to make the speedo read correctly. Gearing (Automatic, TH350) - First Gear - 2. Use this calculator to determine your gear ratio and vehicle's speed in any gear and any engine RPM for best performance. There are a couple for sale in my area but I'm not too sure what which would be the best. To use this, fill in all the blanks and leave the one you are calculating for empty and then hit "Calculate". ) So getting a heavy load started is easier with the 700R4 due to the lower first gear. OER Parts Restoration Parts and Accessories - Speedo Gears. 73 RATIO NOS GM OEM Rear. I'm thinkin the drive gear inside you trans should be about a 9 or 10 tooth and the driven external one should be in the the 21 to 23 tooth range to make your speed read correctly. Gear ratio is simply the leverage that you have in a set of gears. If the trans died because a shaft broke, and there is no clutch material or anything in the pan, maybe you can use the old converter. Transmission gear ratios. 73 rear (assuming 29-inch diameter tires) is a 18-tooth drive gear and 35-tooth driven gear. Then you will have an OD gear, and this will allow you to run a shorter rearend ratio (3. 52:1 for second gear, and 1:1 for third gear. 1) RPM when each gear shifts 2) How far below peak torque each shift puts the engine 3) RPM at given highway speed in O/D gear 4) As a rule of thumb, given the same power and axle ratio, the shorter a given transmission gear (i. Popular Transmission Ratios - use for input below (TH350) and rear tire combination. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. The TH350 was mainly factory installed with small blocks and the TH400 with big blocks and high performance and heavier duty vehicles. Tires, Gears, MPH and RPM A common 4x4 application is an upgrade to larger-than-stock tires. 0:1 (Direct). The 700 is 3 inches longer than a TH350. This gear fits chevy turbo 350 transmissions, GM powerglide 2 speeds, and 60's to 70's manual trans including muncie and Saginaw. 84 Ratio Rollerized Revenger 700 HP! 700R4 2. Looking in the chart, I find the closest match (using a small drive gear and tailhousing) is an 8-tooth tailshaft gear and a 24-tooth speedometer drive gear. 62, third is listed as 1 even, and fourth is 0. 43Clutch Hub:Billet AluminumTransmission Case Style:Aftermarket SFITransmission Case Material:AluminumTransmission Case Finish:NaturalTransmission Shield Built In:YesFlexplate Shield Built In:YesFluid Fill Location:OEM Safety Rating:30. 1st, 2nd, 3rd, etc) the sooner the vehicle will achieve it's given gear's maximum speed. Otherwise, it is usually best to replace the torque converter with a new one or with a properly rebuilt one. com FREE DELIVERY possible on eligible purchases. We have 6L80E Transmissions in stock and free shipping. Or am I wrong? I would prefer 3. Stall is a 3500-4000 Coan triple disc, rear gear is 3. give me a ratio and why do you think that's the best way to go Mild cams don't need as much gear, you. Model Year Engine Trans Type Transmission; Astro: 1989-1992 : TH700-R4/4L60: Astro: 1993 - Up : 4L60-E: Astro Van, Safari : 1995-06: V6 4. You'll need to shorten your driveshaft 3 inches and move the trans mount/crossmember back. Gear-Splitting is that feature which has made Gear Vendors so popular. Gear ratio is simply the leverage that you have in a set of gears. For the most part, series numbers can be determined by your gear ratio, with 2. The constant "1,000" is used since it is the RPM of the Thunderbird SC speedometer at 60 MPH. We supply a full range of top quality transmission parts to enable you to get the best performance out of your Pontiac or GM muscle car. thats the thing though its mostly city riding that i would be doing and the occasional trip to baton rouge to see how i stand up to jason and marshall and a few others but what about in the quarter would the smaller gears slow me down?. But now its going in my 80 that has a 500hp 383 th400 3000 converter. OER® is America's first choice for GM and Mopar Restoration Parts and accessories. 55 or numerically higher will have you right at the max rpm at around 35 mph, only to then have your car fall on its face when it hits second gear, feeling like it skipped a gear. OER Parts Restoration Parts and Accessories - Speedo Gears. 43:1, 2nd Gear – 1. 84 Ratio Rollerized Revenger 700 HP! 700R4 2. History repeats itself when it comes to the. The TH400 length and mount dimensions are for the "shorty" tail-housing model. 9444/1 and lowers the speedometer output by 5. 69-86 1 TH350. 48:1 - 2nd 1. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. 11 ratio gear set, quick release pro tree transbrake valve body, 9310 Chromoly input shaft choice of turbo or powerglide spline, 8 clutch high gear drum with wide steel hub, Kevlar band, Torrington roller bearing, deep aluminum pan, rollerized billet aluminum governor support, billet aluminum. To determine which speedometer gears are needed, you need to know two things, tire diameter and rear end gear ratio. The shift from 3. For more you may wish to check out: 4L60E VS 4L80E Differences TH350 vs. The good news is that either way, you win. 73 non-posi 12 bolt rear end. Transmissions after this period have a higher 5. Transmission identification chart (Automatic and Manual transmissions ALL makes. Comes in 7, 8, 9 and 10 tooth gears. The downfall of this model is its cost when compared to the TH350, this is a more costly affair, making it more expensive to build up to higher power handling levels. It would be very helpful to know either how much torque these trannys were designed for or what GM engines they were used with. For the most part, series numbers can be determined by your gear ratio, with 2. Ratio Adapter Small Part Kit You're viewing: TH350 Speedometer Drive Gears $ 12. The TH350 weighs 120 lbs. JW Performance TH350: 2. I'm thinkin the drive gear inside you trans should be about a 9 or 10 tooth and the driven external one should be in the the 21 to 23 tooth range to make your speed read correctly. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. 52 FIRST gear(TH350) for 2. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. Gear Set, Upper Rmralpha I Gen Ii W147 Ratio 2022 1983-1997 43-18411a 2. That is why you. Gear ratio is simply the leverage that you have in a set of gears. These ratios would be good for performance but the stock rear end would never stand up to the abuse that your proposed engine power would produce. This gear fits chevy turbo 350 transmissions, GM powerglide 2 speeds, and 60's to 70's manual trans including muncie and Saginaw. 01 but if I were condemed to stay in the mid 2s I would have to go to a 6. 3-Speed Transmission Low Gear Sets ATI offers Low Gear Sets for most popular 3-speed transmissions. When you change your gear ratio it is important to get your speedo calibrated correctly. DRIVEN GEARS TH350/C - TH200/C- POWERGLIDE - TH400 - TH700-R4 Small gear with shaft - plastic brown 18T 3987918 03-104 Small gear with shaft - plastic natural 19T 3987919 03-108 Small gear with shaft - plastic green 20T 3987920 03-112 Small gear with shaft - plastic red 21T 3987921 03-116 Small gear with shaft - plastic gray 22T 3987922 03-120. What is the difference in a TH 350 and 350 turbo trans? None, TH stands for turbo-hydromatic, hence th350 or 350 turbo. In mechanical engineering, a gear ratio is a direct measure of the ratio of the rotational speeds of two or more interlocking gears. The wide overall ratio spread of 6. i'm just looking for gear that will run me down the 1320 quickly and a street friendly stall. It features an integral bellhousing.

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