Check ball locations in gm s 4l60e transmission valve bodies. I realize running an automatic is not attractive to everyone but sometimes it is the bestor most cost effective option. This is just the beginning of your th350 rebuild, watch the subreassembly and. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the powertrain control module pcm. How to identify a th350 transmission it still runs. The th350 uses a mechanical linkage that attaches to the carburetor.
This particular th350 build is going behind a pretty powerful engine, so i will upgrade a few areas during the rebuild. Dont lay out a couple thousand on a transmission when its completely. They utilize a kick down cable, and they both use the same bellhousing bolt pattern. Th350 transmission parts,th350 transmission rebuild kits,sonnax transmission parts. This unit is basically a thm 700r4 with electronic controls added to the valve body. Dip01 901j retaining clip, governor cover 6498 1 th700. It came in a chevrolet boltpattern version, long tail shaft version, and even a model with a smaller th350size output shaft. These transmissions mate a threeelement turbine torque converter to a simpson planetary geartrain, providing three forward speeds plus reverse. The th350 is an automatic shift, threespeed transmission. Choosing from the chart at the end of these instructions, pick a weight and spring combination which will.
The fully automatic transmission was equipped with three forward gears and one reverse gear. Lots of information, not the holy grail but a great book to walk you through rebuilding your first th350. Although the design of the th350 is fairly primitive compared to todays computercontrolled transmissions, major disassembly should be left to a. I wonder if any of you fellow bolters out there can help me. Th400 specs, info, and identification drivetrain resource. Tci competition transmissions are designed to take the abuse of dragracing competition. Gm th350 performance parts manufactured inhouse by tcs products call.
Gm th350 transmission assembly guide chevy diy gm th350. The turbo 350 transmission, commonly known as the th350, was a 3 speed automatic transmission that began phasing out the gm powerglide in 1969. Automatic transmission valve bodies th350 transmission type. The bolt in center support assembly is for a 4l60 case, which not only strengthens the. The unit shown is the most common junkyard or swap meet find, and the th400 was the factorys choice for fullsized cars with biginch engines in the late 1960s through the. Holds any gear to any rpm and backshifts with the lever to any gear at any speed. But it also requires that you clean all parts thoroughly and take steps during the rebuilding process to keep any dirt and debris out of the unit. If you have a gm car that falls within these model years, there is a good chance you have a th350. If that applies to your project and you just happen to have a th350 with the lockup feature sitting on the floor of the garage here is how to get that lockup feature working. I understand the th350 went to a lock up converter around this time. Buick transmission parts buick automatic transmission. We stock thousands of gm transmission parts to ensure we can get the part you need for you rebuild delivered to your garage in days quickly at the lowest cost online. Th350 transmission tuning tech hot rod magazine hot rod. When anyone had a stock or a rebuild by anyone else, and the customer complained of slipping, they would reccommend flushing the fluid with type f.
Gm 4 speed overdrive transmission dimensions gm 2 speed transmission dimensions manual transmission dimensions ford 4 speed. I have never used type f in a gm tranny as i dont see the need for it. A gear vendors will handle more horsepower, deliver bigger performance gains, give you guaranteed troublefree performance, and continue reading gm 23 speed auto. Buick cadillac chevrolet gmc oldsmobile pontiac the numberone choice in gmpowered hotrods. The th350 transmission was introduced in the 1969 model year as the successor to the gm powerglide automatic transmission. Th125 transmissions th125 m34 3t40, th125c md9 saturn taat saturn transmission taat fwd 4 speed. Th350 has the vacuum modulator in the back, and the th400 keeps it on the side.
Th350 automatic transmission disassembly the school of shift. General motors transmission parts online automatic. Component application chart oil pressure value chart oil pump to case passages case to oil pump passages case passages case checkball locations valve body passages separator plate passages separator plate checkball locations. Gm th350 tcs high performance direct clutch drum w sprag. Turbohydramatic or turbo hydramatic is the registered tradename for a family of automatic transmissions developed and produced by general motors. Oct 29, 2015 the used th350 transmission is secured in the holding fixture and is mounted on the workbench. Im going to rebuild my own th350 with help of this book and im quite confident that it will help me during the process.
Jan 7, 2014 th400 parts diagram th400 diagram forums. Gm th350 transmission assembly guide transmission building involves careful assembly. Jegs th350 performance transmission for chevy with short 6 in. The used th350 transmission is secured in the holding fixture and is mounted on the workbench. I have used a mild shift kit and type f fluid in the th350 transmissions i. Gm automatic overdrive transmission builders and swappers guide sa design. The novak guide to the gm th350 automatic transmission. Nov 09, 2017 this is a new series i have started an i will show how to dissassemble an reassemble a th350 the easy an save you money. Chevrolet vehicles diagrams, schematics and service manuals download for free.
Automatic transmission line drawings world wide parts outlet. The 197179 np205 was only found mated to the th350 and the sm465 transmission. Automatic transmission valve bodies th350 transmission. General motors th250, th250c, th350, th350c automatic choice. Th350 full manual automatic transmissions free shipping. This is an old draft of some th400 oil pump technical. The turbo 350 quickly become known for its strength. Besides demonstrating an ability to withstand a moderate amount of pounding in stock condition. Identify your transmission, transmission lookup, transmission. For gm th350, th400, th200, 2004r, 700r4, 4l60 and 4l60e, 4l80e with long selector shaft fig.
The th350 transmission was developed by general motors as a replacement for the twospeed powerglide transmission. For gm th350, th400, th200, 2004r, 700r4, 4l60 and 4l60e, 4l80e with long selector. Ls engine engine swap small engine gm trucks chevy trucks chevy s10 truck mods car mods diesel trucks. The gm th400 transmission is a strong unit and came in several configurations, including two bolt patterns and several different overall lengths. Has case protecting snap ring and alum 23 accumulator piston.
Th350 transmission automatic transmission 4l60e transmission rebuild chevy. Best of all, they are entirely free to find, use and download, so there is no cost or stress at all. The th350 offered a substantial improvement to its predecessor, with the additional gear being an obvious improvement from. General motors th125 transmissions th125 m34 3t40, th125c md9 saturn taat saturn transmission taat fwd 4 speed a210, gm mx17 3 speed fwd. Th350 transmission parts, th350 transmission rebuild kits,sonnax transmission parts. Is there any visual clues to identify this from a non lockup. Turbo 350 th350 automatic transmission parts diagram exploded view. Th350th350350 performance transmissions and parts for gm. Using the pan bolt pattern is the easiest way to identify the th400. Pictures cover most of what you need, my pump did not match what they showed, exhaust portion different, extra support ring on bottom, but rest of information very useful.
Chevrolet first produced the th350 transmission for the 1969 model year. They feature special heattreated races and sprags, highperformance clutches and bands, and improved lubrication. Gm muscle car street rod restoration 2speed 3speed automatic 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. Turbo 350c th350c automatic transmission parts and diagram. Lokar cable operated sensor kit installation instructions lokar cable operated sensor kit installation instructions for gm th350, th400, th200, 2004r, 700r4, 4l60. Automatic transmission line drawings due to issues with transmission line drawings images all part requests must be done over the phone. Gm used the th350 in their vehicles starting in 1968 and was found in almost all rearwheel drive gm vehicles through 1984. Tcs products th350 transmission schematicparts nov2012 author. Free pdf diagram transmission 350 turbo gm ebooks 2019 download it faster pdflibrarydotcom offer in in any format such as fb2,djvu,lit,rft,epub, pdf,mobi, because we are able to get enough detailed information online in the book materials. Transmission case and external parts transmission case and external parts legend. Thm 4l60e electronic automatic overdrive transmission. The th350 was still produced many years beyond 1986 for export sales. It came in a chevrolet boltpattern version, long tail shaft version, and even a model with a smaller th350 size output shaft.
Gm turbo 350 and 350c th350 transmission 3 speed transmission. Gm turbo 400 th400 transmission 3 speed transmission. The th350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. Gm turbo 2004r 2004r transmission overdrive transmission. If you want a little firmer shift, a shift kit is the answer, not fluid. Take apart the turbo 350 transmission from start to finish in 2 videos.
Gm th350 transmission assembly guide chevy diy gm th350 transmission assembly guide. Buick transmission parts buick automatic transmission parts. The 4l60e is a fully automatic rear wheel drive transmission. If you have a gm car that falls within these model years, there is a good chance. Lokar cable operated sensor kit installation instructions. The th350 transmission is one of the most popular gm automatics for highperformance applications. Tcs products th350 transmission schematicparts nov2012. You can see both the valley and peak designs below. Pdf free online in the continuing process to keep the technician updated on the four wheel drive. Pdf free online in the continuing process to keep the technician. Gm 350 transmission rebuild fundamentals chevy diy. Free chevrolet vehicles diagrams, schematics, service. Identify your transmission, transmission lookup, transmission specs, gm transmission lookup, 700r4 diagram, 4l60e diagram, th350 diagram, 4l80e diagram, e4od diagram. Jointly developed by chevy and buick, it is also referred to as the cbc chevroletbuick combined 350.
This transfer case was mated to the th350, th400, and sm465 transmission. I have cleaned off a work area and rounded up the tools needed to take the unit apart for inspection. This is a new series i have started an i will show how to dissassemble an reassemble a th350 the easy an save you money. Once all of the valve body bolts have been removed, it slips easily out of the valve. Atsg transmission manuals full pdf 104 mb atsg automatic transmission service group transmission manuals are a collection of manuals for rebuilding transmissions from atsg. Diagrams supplied by general motors and atsg have been noted and are the property of the credited entity. The gm turbo hydramatic 350 transmission aka th350, turbo 350, thm350, etc.
Some units require a good power washing to remove dirt, mud, grease, and road grime before they are taken apart. It is widely considered to be one of the greatest of automatic transmissions ever built. Shown here is a bop buick, oldsmobile, pontiac unit with a short tail shaft. Atsg automatic transmission service group transmission manuals are a collection of manuals for rebuilding transmissions from atsg. The slink is connected to the manual valve and linkage. The th350 then lasted 15 years before eventually being replaced by the 700r4. Theyre available with fullmanual and transbrake setups and retain no automatic shift features. How to troubleshoot a chevy th350 transmission it still runs.
For 1ton vehicles between 1979 to 198485, gm used a th400 and the sm465. Discussion in the hokey ass message board started by customcab, jan 9, 2011. Tci blueprints and modifies these transmissions for maximum performance, then dyno tests and. This is an old draft of some th400 oil pump technical information. Turbo 350c th350c automatic transmission parts and diagram turbo 350 th350 automatic transmission parts diagram exploded view. It is a relatively rugged, compact transmission that lends itself to a wide variety of applications and modifications.
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