Turbo 350 gears. A new speedo drive clip is included.

Turbo 350 gears com FREE DELIVERY possible When you wear out the Turbo 350 then a built 4 speed auto would be worth buying. Oct 10, 2021 · Turbo 400 is the biggest, Turbo 350s and Powerglides smaller. Below is a link that provides some useful information when changing drivetrain ratios and speedometer gears. A reliable parts diagram will show how these components interact within the transmission. 00. See full list on transmissionrepaircostguide. 42 or 3. If the gears are wider then the pump is designed for, the gears will be frozen/vised between the two pump halfs. 73" in the stock rearend. Description Automatic 3-Speed TH 350 6″ Tailhousing. Your math looks good for the 7 tooth driving gear and the 19 tooth driven gear based on your combo (3. Many experts consider the Turbo 350 Performance Transmission perfect for light trucks, rally races, and entry-level sports vehicles. 73 axle. 73 gears? Will it be worth the money? All help is appreciated, thanks! * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually located in the transmission housing and directly drives the speedometer cable Dec 22, 2022 · Once the Hot Rodder forum used to be buzzing for Turbo 350 transmission not shifting issue. I had 3. All 4WD transmissions require the actual core be supplied for preparation. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. Had it I d3 and didn't seem like it was shifting, it Jun 3, 2010 · Hey, Guys- My turbo 350 (short shaft) equipped pickup has a speedometer that doesn't work. I assumed this was because of no or low pressure in the lines. com: th350 speedometer gear housingTH350 Speedo Housing Kit for GM TH350 Transmission 1969 & Up, Speedometer Turbo 350 Includes Retainer Bracket, Extra Seals, Lock Washer & Bolts, Prevents Fluid Leaks, Accurate Gear Engagement- 1 Set Explore a wide range of our Turbo 350 Speedometer Gear selection. It’s very hard to tell just by turning it because the teeth don’t seem to go all the way around the gear. Note that our Chevy 350 transmission is built without an external kickdown cable connection, requiring manual downshifting to engage “passing gear” use. com FREE DELIVERY possible on Aug 22, 2007 · This photo is of a 700R4 but the Turbo 350 works the same way Turbo 350 come with one of three drive gears a 7, 8 or a 9 COLOR code listed below 7 teeth - pink ( shown below ) 8 teeth - orange 9 teeth - green The other gears are below If you have a 7 gear you need a 18 If you have a 8 gear you need a 21 Nov 9, 2025 · This transmission is a 3 speed, and no overdrive gear was available. No overdrive. It is a TCI TH350 (Turbo 350) transmission. ChevelleStuff. 73 gears? And if I do go through with this will it be unhealthy for the engine to cruse at 60mph with the 3. Basically, your Chevy Turbo 350 Trans fails to shift mainly due to the Learn about the Chevy Turbo 350 transmission and how it operates with a detailed diagram. It pulls good off a stop, and can run 80mph or so without the guts flying out of the engine (I'm thinking @ 3,500 rpm). 6 with 3. 10 gear in a car with a 350 and turbo 350. Gearing is what you are buying when you purchase a Gear Vendors Under/Overdrive. So, I unhooked the cable and turned the gear Feb 11, 2008 · The turbo 400 goes to a 44, but they will not work for the th350 or Powerglide. 42 gears was a 7 drive 18 driven gear. Used gear calculator to pic closest driven gear. Click to read more. This complete kit includes a range of components such as 7, 8, 9, and 10 tooth drive gears, 18 through 22 tooth driven gears, a speedometer gear housing “bullet,” retainer clip, both SAE and metric bolts, a Aug 2, 2017 · We have to replace the speedometer drive gear in the transmission to get our speedometer reading correctly. 83 $19. Aug 10, 2023 · 350 Turbo transmissions have regular glitches in their shifts (often ignoring the 1st or 3rd gear), gear engagement (both hot and cold), engine brakings, and transmission noises. Items included as Shown: 7 Tooth Speedo Drive Gear 22 Tooth Speedo The GM Turbo 350 Transmission a 3-speed, automatic shift transmission and one of the greatest automatic transmissions ever built. 23 posi with 235-60-15 front and 255-60-15 rear tires - Dec 11, 2004 · Can anyone tell me what color gear (gears) I would need to have my speedometer to read correctly. This transmission is a 3 speed, and no overdrive gear was available. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. 4"dia. Correct speedo gears will allow your speedometer to read properly. It has reverse, However No Forward Gears at all. 00 Sold out Turbo 350 TH350C Turbo 250 TH250 Transmission Pump Gears . It’s installed in the trans already and trying to figure out how many teeth it has. A new speedo drive clip is included. GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH SPEEDO W/BULLET Add to cart The turbo 350 transmission is short and light, making it utilize less power to spin. whats holding it on etc. net: RPM calculator. Jun 26, 2015 · Here is some pics. Jul 24, 2023 · Chevy 350 Turbo Transmission GuideMechanic. Items included as Shown: 8 Tooth Speedo Drive Gear 21 Tooth Speedo Aug 3, 2023 · Hi Everyone, Figured I'd start an all-encompassing TH350 Transmission thread, similar to my 700R4 thread, to serve as another repository for information about these transmissions. However, it worked great for cruising and had decent 1st gear performance, especially after I replaced the sluggish 750 carb with a 600, and loosened up the spark advance curve. 08 gears/ 225/70-15 tires/27. 00 The TH350's innovative design, weighing approximately 120 pounds, featured a cast aluminum case, three forward gears, and a simple yet robust planetary gear system that proved capable of handling up to 350 horsepower in stock form. My RPM Feb 19, 2024 · CT4332 - A new speedo gear set for Turbo 350 Transmission. My th350 with 26. Sep 7, 2012 · Hows it going I have a th350 looking to upgrade my gears. This trans is origional and never been rebuilt. Items included as Shown: Steel Speedo Housing with Seals Extra Set of Seals to use later 7 Tooth Speedo Drive Gear 20 Tooth Speedo Driven Gear Drive Gear Retainer Clip Speedo Housing Bracket Metric and Non Metric Bolts to Fit all Year A new speedo gear set for Chevrolet Turbo 350 Transmission. 73 ratio i got from the junkyard until i can get the other rearend back from the shop which will be 3. 841 1980-1986 $30. 08 gears. Replaces 6″ tailhousing. 42, which was a choice in 1971 for the rear axle gear, but may not actually be the gear in your particular Esprit. A new speedo gear set for Chevrolet Turbo 350 Transmission. We give you a new "bullet" and a nice assortment of drive and driven gears to accommodate most street gear ratios and tire sizes. It is a good idea to replace your speedo drive clip each time the gear is removed. With the 3. Engine is stock with the exception of intake and carb upgrades. 73 be better on gas mileage or hurt gas A new complete speedo set up for Chevrolet Turbo 350 Transmission. com In conclusion, the TH350 Turbo 350 transmission is a hydraulic transmission with multiple components working together to engage and shift gears. The TH350 featured gear ratios of 2. “Turbo 350” is the nickname that became popular among enthusiasts, while TH350 is the official GM designation. Jun 21, 2005 · If you just replacing the gears in a turbo 350, you have to be careful because they make 3 or 4 different thickness of gears. I am able to shift manually into 2nd and 1st with no problems. 52:1 for second gear, and 1. 06 -> 1. I have a bone stock 350 c. I want a good powerful street car and decent A new speedo gear set for Chevrolet Turbo 350 Transmission. 55 might be a better idea. Feb 28, 2006 · I need to the correct speedo gear and number of teeth for the rear end gears i am putting in my truck. Mar 24, 2015 · Does anyone have a mistake free formula to figure out and order the correct speedometer gears for TH350 trans? I was on TCI website, and they have a Oct 2, 2023 · Have a turbo 350 trans with no speedometer gear. Com – History And Development Of The Chevy 350 Turbo Transmission – The Chevy 350 Turbo Transmission is an iconic piece of American automotive engineering. 42 or maybe a 3. The current axle ratio is 2. I figured that I need a driven gear with more teeth, but the calculations come in wierd. For example, a mild 350 works very well with 3. GM usually paired the Turbo 350 with small-block Chevy engines, such as the 327 and 350 V-8s. It's totally backwards of what I TH350 Turbo 350 Transmission Pump Repair Set with . My drive gear has 7 teeth. Learn more about it's specs, benefits, common uses, and how to identify one. 08 gears and a turbo 350 trans. Doesn't budge. The Turbo 350 transmission consists of several key parts such as the pump, valve body, gears, and clutch packs. - Drop driveshaft, unbolt tailhousing and Dec 28, 2010 · Not real clear on how to determine what speedo gears I need for correct read - I'm running 3. Push clip down swap drive gears and put tail shaft pack on. drove it home and went out to go for a drive the next day, and had no forward gears. The gear ratios used for this transmission were 2. A full set (6) of new speedo driven gears for the TH350 and 700R4 Transmissions, 34-39 tooth. 11 gears would work better at getting the cam up in its power band. i and a th350 mated with it. Total Mar 19, 2013 · I'm about to install the used rearend with 2. The Turbo 350 was known as a durable transmission and was used extensively by GM. 5" 10-bolt 2. I remember some posts which gave some formuls w/gear ratios and transmissions & rpm @ 60 mph. Items included as Shown: 9 Tooth Speedo Drive Gear 18 Tooth Speedo The terms Turbo 350 and TH350 refer to the same 3-speed automatic transmission from General Motors. Get familiar with the TH350 parts diagram to better understand the components of this popular automatic transmission. Unless you're going with a tall rear tire, high stall speed converter or a big cam, about all you want is a 3. This is a set of high quality replacement pump gears for GM's Turbo 350 automatic transmissions. The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive solution designed to cover all speedometer calibration needs, regardless of tire size or rear-end gear ratio. . Larry, The easiest way to find the right gear is to take the gear you have and add or subtract teeth. 52:1 for first gear, 1. 74 -> 1. 97 Turbo 350 TH350C Transmission HI-Flow Brass Filter 1969-1986 fits GM 3-speed $12. Jan 23, 2020 · Buy GM TURBO 350 TH350 MUNCIE POWERGLIDE TRANSMISSION SPEEDOMETER GEAR KIT 8/18 19 20 21 22 W/BULLET DRIVE GEAR CLIP: Drive Gear - Amazon. 73 with 28" rear tire). I have a 350 engine, 350 turbo trans, and the 3:50 rear is a 9" from an early Bronco. With 2. Click here for the tire size conversion chart speedo gear color chart Turbo 400 (M-40) Apr 1, 2018 · Gear Ratios – The TH350’s gears are placed closer together (despite having less of them). Covers servicing, rebuilding, parts selection and performance/heavy duty upgrades for your TH350. I think I understand how to get the old gear out and the new gear in, but have a few questions. Transmission has under 1k miles on it. The Turbo 350 is a three-speed automatic transmission with a cast aluminum case, which helped reduce its overall weight compared to the heavier iron-cased TH400. Understand the inner workings of this popular automatic transmission. 0 for 3rd gear. 52 second gear, and 1:1 3rd gear. When you get to 500 hp you may find out the turbo 350 is the fuse and 4. ATI offers Low Gear Sets for most popular 3-speed transmissions. Explore the GM TH350 automatic transmission — its specifications, adaptability to Jeep transfer cases, and compatibility with various engines. and Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. dropped the pan and valve body and here's what I found; pan had thick gray A new speedo gear set for Chevrolet Turbo 350 Transmission. The Turbo Hydramatic 350, or simply Turbo 350, is a three speed automatic transmission used between 1969 and 1986 in a variety of GM cars, trucks and SUVs. 42 posi, 12 bolt. Items included as Shown: 7 Tooth Speedo Drive Gear 7 Tooth Speedo Yes the 350 turbo is a 3 speed auto with 1:1 3rd gear. 06 first gear of the 4L60,,,it has a huge rpm drop the engine has to recover when the 1-2 shift accurs, and is not a fan favorite among serious racers. I recently bought a 74' C20 with a small block and a Th350 tranny, which had been rebuilt three years before. Refundable core charge for acceptable transmission cores: $175. Currently running a 245/50/15 tire with a 2700 stall converter. If you take a few moments to study the gear chart for your transmission and rear end ratio combination you will see why this product is so popular. Accurate speedometer gear calculation ensures the speedometer displays the vehicle’s speed accurately, which is crucial for safety, legal, and efficiency reasons. The speedo driven gear is easy to change out, so it is always nice to have some options available to keep your speedometer accurate when changing out tires or rear end. 13 Free shipping Turbo 350, 350C Automatic Transmission Oversized Pump Gears | 0. turbo 400 power loss, the th400 uses more power during operation than the turbo 350. 0. Discover the Turbo 350 Transmission, also known as the Hydramatic 350. The Turbo-Hydramatic 350, commonly referred to simply as the "Turbo," was a three-speed automatic transmission first produced by General Motors in 1969. May 23, 2018 · Transmission Fluid Fill Capacities JEGS 555-60300 GM TH350 Performance Automatic Transmission Features: Fits Chevrolet Engines and 2WD Applications Handles Up To 450 HP Firm, Crisp Shifts Designed to work without a throttle valve or kick-down cable Removal of the kick-down block-off plug voids the warranty Speedometer drive gear and driven gear not included Overall Length: 27 5/8 in. 52 first gear, 1. I am putting 4:11's in my rear end and want to make sure i get the right speedometer reading. General Motors produced the TH350 or Turbo 350 three-speed automatic transmission to equip its Chevrolet, Buick and Pontiac cars beginning in 1969. Detailed TH350 shift linkage diagram explaining the components and their connections for accurate installation and maintenance of the transmission system. Items included as Shown: 8 Tooth Speedo Drive Gear 22 Tooth Speedo Jan 23, 2020 · Buy GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH SPEEDO W/BULLET & CLAMP: Speedometers - Amazon. 57. I was thinking about 3. So comparing the turbo 350 vs. 73. Items included as Shown: Steel Speedo Housing with Seals Extra Set of Seals to use later 8 Tooth Speedo Drive Gear 21 Tooth Speedo Driven Gear Drive Gear Retainer Clip Speedo Housing Bracket Metric and Non Metric Bolts to Fit all Year Oct 23, 2009 · When engaged in any gear it drove forward, essentialy, all gears were drive gears, no neutral, no reverse just Park and Drive. There are not too many gearboxes that can make that claim. 55's, TH350. 52 for 1st gear, 1. This two-speed box thrives after 71 years and still sees use in motorsports and classic cars. When introduced in upper-level Chevrolet models in 1950, the Powerglide represented the first automatic transmission offered by Mar 20, 2021 · Hi. While a vehicle with 4. Jump to Latest 72K views 7 replies 4 participants last post by tnsmith10 Jan 21, 2009 7 Aug 29, 2010 · Turbo 350 Detent Cable must be hooked up to have kickdown passing gear function, and proper shift points. Construction and Size The Turbo 350 transmission was a single piece transmission with the bell housing integrated into the transmission body. reverse was fine. A full set (6) of new speedo driven gears for the GM TH350 Transmission, 17-22 tooth. Today I replaced both lines, there are no leaks and I replaced the transmission fluid that was lost and verified the level with the dipstick. Does anyone know on a turbo 350 can the gear shift selector be replaced while the transmission is still in the car? I've heard the valve body and A new speedo gear set for Chevrolet Turbo 350 Transmission. I drive the car daily so I want to have some kind of economy mind and am wondering what most folks recommend for a daily Jul 20, 2011 · R Frederick Member from illinois After having a couple 4:11 cars, I started using 3:50 rear ends. In addition to supplying increased torque for towing and motor homes, these gears are an excellent alternative to steep rear end gears for street driven performance vehicles and low RPM, high torque race engines. Externally, each Turbo 350 transmission includes a new adjustable vacuum modulator and chrome oil pan with drain plug, making future transmission oil changes easier. This should be Apr 21, 2013 · I have a 79 Chevy 1/2 ton 2 wheel Drive. Items included as Shown: 9 Tooth Speedo Drive Gear 22 Tooth Speedo Choosing the Right Stall Converter for Your Turbo 350 and Engine Combo The Turbo 350 (TH350) transmission is a 3-speed automatic transmission developed by General Motors in the late 1960s and widely used through the 1980s in various GM vehicles. Oct 24, 2010 · Tell us about your engine. Have a 77 vette that I just changed the differential gears to 3. Never underestimate the mighty post-war Powerglide. Apr 25, 2007 · TH350 speedo drive gear replacement just so Im not gonna run into suprizes whats the procedure for speedo drive gear replacement? I know the tailshaft needs to be removed and im sure the drive gear is slipped onto the output shaft. It shifts fine into the 2nd gear but not 3rd. Feb 17, 2019 · Hi. 721" THICK FITS '69-'79 GM Aug 7, 2022 · A new complete speedo set up for Chevrolet Turbo 350 Transmission. 4 bolts take tailshaft off. 52 for 2nd gear, and 1. Sep 6, 2011 · C3 General - Gear ratios and rpm - I have a76 (former L-48 current 383) W/ 3. However, over time the Turbo 350 will develop problems, as with any type of Then, how many gears does a th350 have? This is an automatic transmission that is longitudinally mounted, making it applicable for rear-wheel drive cars. However, unlike the 700r4, the detent cable is NOT a TV (Throttle Valve) cable that regulates fluid pressure although their functions are very similar, but a Turbo 350 will not be harmed by driving without the Detent Cable connected but Apr 17, 2017 · On my first drive after getting my car finished car ends up being towed home. That means the transmission is not turning out of first gear or it is not moving into 2nd or 3rd gear. This section will break down each case in further detail: Vehicle Slipping in Park Customers report the Turbo 350 transmission struggles to keep their cars stationary whenever the gear selectors are pulled to “Park Mar 20, 2024 · The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct speedometer gear for vehicles with the TH350 transmission. The speedometer reads way faster than what you're really going. The driven gear has 21 teeth. Jan 27, 2007 · Ok, current setup, 26" tall tire, 3. Home AUTOMATIC TRANSMISSION 350 350C TH350 TH350C 250 350 TH350 TRANSMISSION PUMP GEARS SET . Please contact us if you need help calculating the proper gear set for your TH350. Measure the depth of the pump where the gears set as compared to the replacement pump gears thickness. The sheet shows the rear axle gear to be a 3. Does anybody know what Jun 13, 2014 · It is the gear ratio for first gear of the TH350 transmission. The speedo drive gear is orange. Any recommendations? Thank you. TH350 short, most common tailhousing length for TH350. May 9, 2011 · I have a 73 Nova with 350 engine and TH350 trans. ** All 3-speed (non-Powerglide) transmissions require either a like-kind core be supplied or a unit specific core fee be paid. In fact, when I got my 55 sedan it had a 350 with TH350 and a 7. Accelerating up through 35 MPH and past 45 MPH still does not produce that 2nd shift. Aug 4, 2023 · What are Turbo 350 gear ratios? Which benefits can you get when you read Turbo 350 transmission gear ratios correctly? The answer is here. Are all the orange gears Dec 13, 2011 · I figured the best way to do this would be 3. Amazon. Sep 26, 2025 · GM TURBO 350 POWERGLIDE SPEEDOMETER GEAR SET 18 19 20 21 22 W/BULLET CLAMP BOLTS $36. It does have a better gear spread than the 4L60. Understanding this transmission’s functioning can assist in diagnosing and resolving any issues that may arise, ensuring optimal performance and longevity of the vehicle. When you put in Reverse, It moves and pulls engine RPMS Down, Go into Neautral from Reverse Engine RPMS increase, Go into any Drive from Neautral and No Learn more about the GM Turbo 350 transmission, including its history and development, its key features, upgrades, and more. 45 Summit Racing™ speedometer gear kits are designed to recalibrate the gauge back to normal after changing rear axle ratios or tire diameters from stock. The 700R4 goes from a 3. The HydraMatic 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. I'd try to sell the 4. 727 Gear Set $37. Car has a pretty built 350 with a b&m th350 with a 2200 stall. Items included as Shown: 7 Tooth Speedo Drive Gear 20 Tooth Speedo For units producing over 1000 HP, please call and consult your ATI Sales Technician for further details on what we can offer you. I just want to know will I loose highway and country backroad drivability by adding posi and the 3. 55 and would like to change the speedo gears before I put eveything back under car. Items included as Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. 73s but a friend of mine said 3. 73 gears and posi. If you want a better gear spread between gears and you Nov 1, 2025 · People who viewed this item also viewed Speedo Driven Gear 23 Tooth, GM 250 350 TH250 TH350 Speedometer $16. Apr 2, 2023 · A new speedo gear set for Chevrolet Turbo 350 Transmission. Filled with new fluid and took it out for about a 3 mile trip. Mar 31, 2021 · For a Chevy Turbo 350 trans, it is most likely going to have the "bullet" style holder and your trans will use the smaller diameter "driven" speedo gear. 10 for more than you pay for it and put a better choice of gear in your car. Shop now for fast shipping and easy returns! GM/CHEVROLET FINAL DRIVE RATIOS It is the gear under your seat that counts. I was wondering would the 2. I have a 72 C-10 with a 350 cubic inch engine and a turbo-hydramatic 350. Learn how they function and how to maintain them properly. 723'' Thick The Turbo 350 quickly become known for its strength, versatility and compactness. May 4, 2013 · I wouldn't put a 4. For example, while driving your car, the transmission goes through 1 st gear, and then it starts acting up and stops shifting. 62 1-2 shift, which is way more aggressive than the Turbo 350’s 2. It featured a 27 spline driveshaft with each pan in transmission able to take up to 4 quarts of oil. Items included as Shown: 7 Tooth Speedo Drive Gear 19 Tooth Speedo Jan 16, 2009 · T-350 - no forward gears, only reverse. Find top brands, exclusive offers, and unbeatable prices on eBay. 11 gearing may scream down the highway with a a TH350, it’s going to keep the engine in the power band longer. 730" Thick | Fits Chevrolet, GMC, Cadillac, Buick, Oldsmobile And Pontiac Cobra Transmission Parts Jan 29, 2000 · My recently rebuilt TH350 doesn't seem to be shifting into the 3rd gear automatically. 00:1 for third gear, providing a good balance of acceleration and cruising efficiency. The … Continue reading GM Drive Ratios → Find Speedometer Gears In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! 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): Explore the GM TH350 transmission diagram and learn how this popular automatic transmission works and is assembled. General Motors TH350 transmission specs, ratios, and tech. mvdrg bbwqs ceeefee xibb peaf yfnziq rqiyyx mbnku sipm fyofyi jvgl ntjbp fazncq ikhv eyjvym