Turbo 350 transmission torque specs. Chevy 350 engines are no exception.

Turbo 350 transmission torque specs When comparing the TH350 vs the 4L60E, there are many differences. Yes! The terms Turbo 350 and TH350 refer to the same 3-speed automatic transmission from General Motors. Is there a free site that gives this info. Kickdowns are controlled by the detent cable. Feb 18, 2012 · 350 Chevy Torque Specs Flexplate (Automatic) Flywheel (Clutch) Thread Locker 60 ft-lbs. Remove the last two bolts slowly and the pan will tilt down to allow the last of the fluid to drain. GM made the 4L60/700R4 before the 4L60E. Nov 9, 2025 · The Turbo 350 transmission was a single piece transmission with the bell housing integrated into the transmission body. I have the new T350 bolted up to the engine & torque conv. of Dexron III trans. Application For hi-performance vehicles and street rods. Here you'll find Turbo 400 Identification Information, specs, and general information about the TH400. Identifying internal components. It is an automatic shift, positioned longitudinally behind the engine for the best power ratio and durability for rear-wheel drive. Sep 3, 2025 · Get the Best Performance with Moroso Transmission Pan Gasket GM Turbo 350 93102 parts at JEGS. Add a quart of new transmission fluid to the torque converter. of torque just for the bolts for the flexplate/flywheel to crankshaft. An electrical plug on the driver’s side of the transmission identifies the lockup converter, according to Novak Conversions. thanks jmi Aug 29, 2010 · Turbo 350 Uses Same driveshaft yoke as 700r4, 2 Speed Powerglide, Muncie M20, M21, and Saginaw 4 speed manual transmissions as well as others. Learn more about the GM Turbo 350 transmission, including its history and development, its key features, upgrades, and more. 2). -lbs. The similarity of the THM 350C and the THM 350 are covered in this manual, along with some of the 350 updates ‘We wish to thank General Motors Corporation for the illustrations and The GM Turbo 350 Transmission a 3-speed, automatic shift transmission and one of the greatest automatic transmissions ever built. Centerbolt (Harmonic Damper) Engine Oil 60 ft-lbs. THM350 vs THM400 The Turbo 350 was built for lighter duty applications than it’s heavier duty counterpart. Six pieces total. Beginning in the early nineties, the 4L60E began to be the go to transmission for GM light duty cars and trucks. GM installed a lock-up torque converter in 1979 through 1984 vehicles. By 1984 the TH-350 was on its way out in favor of the new 700R4, a 4 speed automatic transmission. They are all made of aluminum. I've read a few posts which mention 'boxwrench. Nov 27, 2018 · I was wondering what that complete torque bolt specs on inside and out of the turbo 350 trans. Chapters:00:00 Intro (What to Expect)00:50 Extension Housing01:47 Trans M Th400 and Th350 are two darlings from General Motors that are prevalent till date. The specs for the motor say 330 hp and somewhere around the same torque. Oct 29, 2021 · I read from what little research that some folks said there turbo 350 converters took the 3/8x16 bolts and were a little loose but they used them anyway. Hardware torque specifications for GM's 4L60E automatic transmission. See full list on transmissionrepaircostguide. The final Mar 13, 2010 · Torque Specs on th350 pan bolts Pontiac - Street Mar 12, 2023 · There are many different transmission pan bolt torque specs, depending on the make and model of the vehicle. Shift delay, line pressure control, and shift feel are all controlled by the vacuum modulator. They are all covered here. 60 ft. That does not seem to squish out the side, but tight enough to not leak. The time now is 03:09 PM. Thanks for any help. 52/1. Learn our tips on how to choose the right stall converter/torque converter for your GM Turbo 350 transmission to make your build the best it can be. Prep converter for install. I’ve heard they will still leak if the bolts are over tightened. Complete unit comes with general installation instructions. The TH350 was also known for its quite short length, with an overall length of 21. Jun 24, 2011 · A person here in town has a TH350 for a 1983 trans am. That also converts into a lighter transmission that carries a weight of 120 pounds. Looking in my 350 manual, by Ron Sessions, he says 7-10 ft/lbs (84-120 in/lbs). Mar 18, 2009 · th350 trans pump replacement? Pontiac - StreetAll times are GMT -4. Lubricate the bearing surface of the hub and slide the torque converter onto the transmission. Shop Now at the Guaranteed Lowest Price! Jun 16, 2021 · Also thanks on the torque specs but from what I read the big bolts that bolt the bracket on the transmission aka the side bolts of the mount are to be torqued 30 ftlbs with the bolts dry and no lube and the same for the stud and nut. Click to read more. Jun 28, 2008 · Can someone tell me what are, or where to find all 350 SBC to Turbo 350 torque specs? Specifically Torque Converter to Flexplate. 6mm total length. Bellhousing (Transmission to Block) Engine Oil 25 ft-lbs. M464GD 3/8" x 1/2" - 16T Coarse. Comprehensive guide on torque specifications for Pontiac engines, providing detailed information for enthusiasts and mechanics. Bolt and torque the flex plate to the crank, bolt the tranny to the engine, slide the torque converter forward until it mates with the flex plate, align the three holes and torque the bolts. 8 are the same and the other 5 are all somewhat different. The first step in this process is to install the torque converter into the transmission. “Turbo 350” is the nickname that became popular among enthusiasts, while TH350 is the official GM designation. Using the aid of a helper, stand the transmission on the tail shaft and carefully install the torque converter onto the transmission. Discover the Turbo 350 Transmission, also known as the Hydramatic 350. The 200-4R is very similar to the 700R4, although there are some differences between the two of them. lbs. Features Higher Torque and Thrust Capacity Improved Oil Circulation Significant Slippage Reduction Hi-Capacity Filter Competition Components Apr 1, 2018 · There are many differences between the TH350 vs 700R4. These figures vary in ranges of years as well as which engine is used. general motors turbo hydramatic 350,TH350,turbo 350, help you build,turbo350,thm350 May 19, 2011 · 3rd Specs - What are the correct torque specs i've seen anything from 35 - 80ft lbs for converter to flexplate torque settings?. 2 days ago · The Turbo 350 transmission was a single piece transmission with the bell housing integrated into the transmission body. A torque converter to fly wheel bolt & nut set for the Chevy TH350 transmission 1969-up. com. this was for a TH-350 to a NP-205most torque specs for bolts by size listings also say 35 ft lbs is the usual rating for a 3/8" bolt. The bolts each measure 21. Cylinder Head Bolts Step 1: Torque the M14 (1-10) cylinder head bolts to 65 lbf/ft (88 Nm) in the numerical sequence shown. The best way to find the specific torque spec for the pan bolts on your vehicle is to consult your owner’s manual or a reputable automotive repair guide. Make sure you support the back of the transmission so you won’t damage the distributor). May 23, 2018 · The Performance Automatic Transmission is a GM TH350 with a Chevy bellhousing bolt pattern. New torque converter bolts (3) for TH250 TH350 & TH400 transmissions. Shop TH350, Automatic Transmissions and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. Place a new gasket on the pan rail. com' and found Flexplate to Crankshaft to be 60lbs, but I can not find torque specs for the torque converter to ATSG sie INTRODUCTION THM 350C The THM 350C transmission, first introduced in model year 1980, is a modified version of the previous THM 350 transmission, with the addition of a Torque Converter Clutch. Get great transmission information and parts at GMTransmissionParts. Mar 17, 2006 · Leave the torque converter on the transmission, slide it back on the input shaft as far as it will go. 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. Aug 10, 2011 · DEPTH CLEARANCE: GM Turbo-Hydramatic 350 1 1/8" from Bell Housing to Pads GM Turbo-Hydramatic 400 / 4L80E / 700R4 1 3/16" from Bell Housing to Pads GM Powerglide 1 1/8" from Bell Housing to Pads Most Fords 1" from Bell Housing to Pads *Distance may vary either way . Prices listed are for base model units with the valve body listed. bolted up to the flexplate. is the most widely used specification for most V-8 engines. Jul 24, 2023 · Chevy 350 Turbo Transmission GuideMechanic. 4K views 4 replies 3 participants last post by eric32 Oct 3, 2017 E Jan 18, 2011 · TH350 Trans and converter being mated to my 354 Hemi using a Wilcap adapter. Jul 9, 2019 · I can't get a torque wrench on cuz of the clearance between the flex plate and oil pan, I'm wondering if I take the pan off will I have the room to get the torque wrench on. Although the TH350 Identification The Turbo 350 came encased in a one-piece aluminum alloy housing unit. It fits 2WD applications and features a short 6 in. Understanding torque specs ensures your engine runs smoothly and safely. The THM400 was designed to handle more torque and horsepower, therefore it is still the preferred transmission of people looking for a factory automatic that can handle a lot of power. 75 . Rated up to 450 HP, it has a case fill and is dyno tested for reliability. Kevin General Motors TH350 transmission specs, ratios, and tech. For P/N 42010 use Moroso Transmission Pan Gasket # 93102, tighten the pan with the Serrated Flange Hex Bolts . Then replace t/w with habd wrench and "feel" the torque required to turn. Download your guide today. Please let me know what you think about the torque specs and my overall plan. Check that all the Drain Plugs are tight. Feb 10, 2003 · Hello all, Well the T350 install continued this weekend. Thanx, Evan Many experts consider the Turbo 350 Performance Transmission perfect for light trucks, rally races, and entry-level sports vehicles. Does the TH350 Transmission Use a Lockup Torque Converter? No, the TH350 uses a standard torque converter without lockup. Turbo 350 uses a Detent Cable (aka kickdown), Vacuum Modulator and Governor to control shift points. The old B&M instructions, says 100 in/lbs. May 9, 2015 · Transmission pan bolt torque The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Trans Basic Operation: The THM 350 is a RWD 3 speed unit. It is a the lesser known of the two overdrive transmissions made by GM in 1980’s, and is still considered part of the Turbo-Hydramatic series. Nov 7, 2007 · Any of you know the proper bolt sequence to use when installing a th350 transmission pan? Got a massive leak on mine. Spin the torque converter and listen for 3 distinct clicks as it drops into the transmission. It measured 21. The transmission casing is made of cast aluminum. Jun 17, 2002 · I need the torque specs for the front cover of a turbo 350 tranny, the tranny is a 1975. The Turbo 350 is arguably GM's most popular automatic transmission with the aftermarket even today. 5 Thread, Slotted Hub, 1. See what it takes to install a torque converter. For proper operation all vacuum lines & kick-down components MUST BE USED. 00 What should I do if there are torque converter problems in the Chevy Turbo 350 transmission? If there are torque converter problems in the Chevy Turbo 350 transmission, it may be due to a faulty torque converter clutch, a clogged torque converter, or a damaged torque converter seal. Feb 7, 2023 · That explains keeping pouring in excessive fuel compared to your turbo 350 transmission fluid capacity, in this case, only brings counterproductive effects, which possibly cause a total mess such as your transmission fluid gushing out or transmission slipping after fluid change for you to clean up later. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Engine Hotrodders' Lounge Body - Exterior Transmission - Rearend Hotrodding Basics Home Forums Tech Help Transmission - Rearend Feb 13, 2013 · Performance Automatic also offers a complete package that includes a torque converter matched to your combination, transmission dipstick, and a universal transmission mount. Put a new gasket and tightened it Pro Competition GM Turbo 350 Maximum HP Rating: 700 Maximum Torque Rating 750 Standard Gear Ratio: 2. TH400 Torque Converter:1). Dec 2, 2009 · Just in my 1964 to 1988 GM A/G body manual the torque specifications range between 48 and 70 ft. always torque bolts in three equal increments Bolts or Parts Lube or Sealer Torque to: Apr 3, 2018 · There are a lot of differences between the 200-4R and the TH350 transmissions. 050". Perfect for vintage cars, muscle builds, and street rods, the TH350 delivers smooth, consistent shifts and is designed to handle demanding applications. It was commonly used in a wide range of vehicles from the 1960s through the 1980s. 75 inches long and weighed 120 lbs. This is espescially true for the people who are still using the generation I and II small-block Chevy. don’t know why it’s so hard to find anything about this online. 7L V8 4WD AUTOMATIC 246,000 MILES Explore the GM TH350 automatic transmission — its specifications, adaptability to Jeep transfer cases, and compatibility with various engines. 4th tips - Is there any special thing to do or lookout for when installing the torque converter. Thanks ahead of time to any dood who can help out here !! Converter information about dimensions, upper / lower limit measures and other info This video will walk you through the proper steps,and procedures for making sure your transmission,torque converter,and flex plate are installed correctly. Mar 23, 2002 · Anyone know what the torques specs are for the pump to case mounting bolts on a th350? I've been fighting with a leak there forever, and we are about to Turbo 350 transmission pan torque specs DAYTON41799 MEMBER 1994 CHEVROLET 1500 5. Installation ti Unleash the classic power of the SportMonster TH350 transmission—a 3-speed automatic built for reliability, performance, and versatility. Torque Converter; Lock-Up, 12" Overall Diameter, 10. Proper torque ensures a secure seal. (Note: Moroso Performance does not recommend using any type of sealer on the gasket. tail housing. W Oct 3, 2017 · turbo 350 torque converter selection Jump to Latest 2. Small pieces may dislodge and clog the transmission or transbrake internals resulting in failure). TH350, Automatic Transmissions in-stock with same-day shipping. Includes three each M464GF torque converter bolts and lock nuts (3/8" x 9/16" 24T Fine - Standard Bolt). Feb 27, 2000 · Only specs my old books have for t-case to tranny are 35 ft lbs. From what I read there's alot of differences right? So it wouldn't be easy to bolt that sucker into my chevy pickup with a 454? My Pickup has a TH350 short shaft now. Chevrolet, Powerglide, TH350 & TH400, w/ race converter, 1/2˝ thick tabs Mar 13, 2025 · Torque specs are crucial for any engine work. What torque should I put on the pan bolts? The bolts are the new stainless hex (Allen key) style. Jul 29, 2003 · A forum community dedicated to hot rod owners and enthusiasts. I torque cork/rubber gaskets to 175 inch lbs. The Th350 transmission, also known as the Turbo 350, is a three-speed automatic transmission that was produced by General Motors. Suggestion< Double nut a 3/8 bolt in the vise and adjust it for 30-35 ft/lbs as shown by your torq wrench. everything on the trans in and out has a different torque setting. 703" Pilot Diameter, 30 Spline, 1600-1800 Stall Speed 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. Com – History And Development Of The Chevy 350 Turbo Transmission – The Chevy 350 Turbo Transmission is an iconic piece of American automotive engineering. Here's the torque specs and torque patterns that we used for the TH400 Build Series. Jan 20, 2003 · Bpos has given the correct specs. . Feb 26, 2003 · What is the proper way to tighten the bolts on a th-350 pan? Ive got a paper gasket, not the cork, do i need silicone? May 25, 2008 · What are torque specs on the pan and filter of Chevy 350 turbo tranny. Unleash the classic power of the SportMonster TH350 transmission—a 3-speed automatic built for reliability, performance, and versatility. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. Question 1: When I put the adapter on, the face of the flexplate was Nearly all of the GM automatic transmissions have a few things in common. Measure the depth of mounting pad face (A) from the mounting flange face. Detailed torque specifications for the Ford Super Duty 3, made from (2011-2016), and tightening torques for all of its components, including the wheels, engine, brakes, suspension, and exhaust, in both Nm and ft/lbs. Always use new bolts in vibration damper! All Figures on next page. TH350 vs 2004R differences include length, weight, gearing (overdrive and ratios), crossmember location and more. Pour at least 1 quart of clean ATF slowly into the torque converter. 750" Bolt Pattern, 3 pad Mount w/ 10mm x 1. Comprehensive guide to the GM TH400 automatic transmission — specifications, identification, history, and adaptability for Jeep conversions. Jun 30, 2017 · C3 General - C3 350 small block th350 transmission info - I just bought a 1980 corvette with a 350 small block and th350 transmission. any help is appreicated. This article places Th400 vs. I've torqued to 150 inch lbs before and after a couple weeks of use, seem to start leaking. Spin the torque converter at the same time to help align the input shaft and stator splines. Mar 31, 2018 · The TH350 was GM's go to transmission for light duty vehicles for at least 20 years. Th350 side by side and explains what they are. All transmissions are blueprinted and assembled to the specific torque demands of each engine application. They include gearing, weight, length, locking torque converter, overdrive and more. The 200-4R is a transmission that was manufactured by General Motors for the 1981 model year. Before I bolted the T350 up, I poured in 1 qt. Generally speaking, however, most transmission pan bolts should be tightened to between 18 and 24-foot pounds of torque. How can I find out the exact placement May 17, 2007 · Will a turbo 350 with a BM shift improver kit (Stock type steels and clutches) hold up to this sort of torque? The reason I ask is because the truck was origenally a small block powered truck and had to have the transmission rebuilt about 8 months ago (I hope to be able to reuse it because it is fairly new). This may require considerable effort. Learn more about it's specs, benefits, common uses, and how to identify one. Chevy 350 engines are no exception. com Dec 21, 2003 · The instructions for the TransGo kit I just put in, says to torque the valve body bolts to 75 in/lbs. And like he said, it'll vbe hard to have torque wrench underneath the car trying to measure everything. fluid into the converter and installed it on the T350 input shaft as far in as Oct 20, 2023 · The torque specs for the transmission pan should be followed precisely to prevent leaks or damage. Jul 17, 2021 · Torque Converter Bolts For TH350, TH400 and Powerglide Converters [Set of 3] The TH400 is a venerable transmission that has its roots in mid-century automotive tradition but has since been modified for modern use. Dyno tested Street King Turbo 350 3-speed automatic transmission with 6-inch tailshaft 1/4 NPSM Street King transmissions suitable for street and mild strip use up to 450 hp Features standard Chevy V8 bellhousing bolt pattern All new friction and steel plates, new intermediate band, and all new bushings Front pump rebuilt for higher transmission line pressure Valve body rebuilt with shift Hardware torque specifications for GM's 4L60E automatic transmission. Later models were equipped with TCC and designated as THM 350C. Mar 22, 2011 · If I recall, torque specs on the pan is 13ft lbs. Jun 10, 2006 · Wondering if anybody know the torque specs for the flywheel to torque converter bolts for aTH350? Do they have to be torque? Jul 17, 2012 · How tight should trans pan bolts be? The 1967 - 1972 Chevrolet & GMC Pickups Message Board May 23, 2009 · Hey guys, I need to find the torque specs to install the tranny pump. 3). It can put out at least 400 foot-pounds of torque at market specs, but enthusiasts have been known to modify it and increase The 350 in TH-350 refers to the amount of torque that the Turbo Hydramatic 350 was rated for. We'll break them all down. Factory automatic type shift pattern & manual hold operation. Torque to 10 ft. Clutch Pressure Plate Thread Locker 35 ft-lbs. Dec 8, 2013 · C3 Tech/Performance - Auto transmission pan bolt sequence? - I got a new gasket for my '79 transmission automatic oil pan but when I took it off I didn't realize there are three different types of bolts that held it on. Jul 6, 2019 · • 5) Tighten bolts across center of crankshaft. I wold hate to think if I ever needed to take my transmission out and have it rebuilt that the torque converter threads would be toast cause of the wrong bolts. Please don't hesitate to contact us if you have any questions. It looks to me like the bell housing bolts up different and the torque Nov 22, 2023 · Get the THM 350 350C ATSG manual with detailed repair, service, and troubleshooting steps for automatic transmissions. Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. I'd rather not just tighten it by feel cuz my torque converter has welded in nuts on it. Is the 75 in/lbs TransGo speced tight enough? Does anybody know the torque specs on the 350 pan bolts? Feb 20, 2003 · TH350 pump bolt torque specs 1 reading Jump to Latest 14K views 3 replies 2 participants last post by reddwarf Feb 22, 2003 Jan 7, 2019 · Hey guys, I’ve been experiencing trans fluid leaks around my trans pan, th350… I have a new aluminum pan and rubber gasket. wsqk dmo qgeym gzzl xfgg eocun vmncyg jylc lcxpb vnacxqyw kogpqp sgnr mveuhf fgvjfa hxia