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How do you reset the governor in your THM350 and THM400 transmissions to increase the speed?
Wiki User
∙ 16y ago
The speed governor in a thm350 is a centrifugal device with weights and springs altering this device is tricky .Try the after market.
Wiki User
∙ 16y ago
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What transmission is better the thm350 powerglide thm400 or the 700r4 its going to be used in a el camino for drag racing?
out of the two, you'll find that the thm400 is a better transmission all around. it was a more heavy duty built transmission than the thm350, and it does last a lot longer. we had built up a 77 gmc sierra classic with a 350 4 bolt, and it was pushing near 500 hp. tore apart 3 thm350's before going that little bit bigger, never had a problem with the used 400 we bought. just from my experience, the 400 is a better transmission, a little harder to come by, but much worth looking
1983 Chevy truck how long is the driveshaft?
I have measured the "Tube" portion of the drive shaft to be 66" in length, however, the reason i measured it was because there was a THM400 tranny installed in the truck replacing the THM350. This made the drive shaft a bit short for the THM400. So, I dont know if there are any longer driveshafts or I would need a Spacer of some sort to extend the overall length of the driveshaft. I guess that would be my question to answer your question with. R/R
What automatic transmission does a 1984 Chevy silverado 2wd have?
This will depend on how many bolts it has. If the vehicle has 13 bolts you will need a THM400. If it has 16 bolts it will need a THM700-R4.
Will the thm425 fwd transmission bolt in place of a thm400 on a Chevy small block?
There were three bell housing patterns I know of for the THM425.ChevPontiac/BuickMulti (Both)The correct answer to your question is in order: Yes, No, Yes
What GM transmission carries case number 24225029?
The THM400 can be visually identified by an oil pan number four shown at General Motors Transmission Pans. First introduced for the 1964 model year under ...
How many Qt 's of Trany oil are needed to change oil in a Chevy turbo 350?
Since you didn't tell the year If you include the Torque Converter it will be more like 10 Qts. Specs from a 1980 CHEVROLET TRUCK C20 CAPACITIESEngine, without filter..........4.0 quarts[1]Cooling System, with AC Initial Fill..........18.0 quartsCooling System, W/O AC Initial Fill..........17.0 quartsAutomatic Transmission, THM350 Initial Fill..........3.5 quarts[2]Automatic Transmission, THM400, 75 Initial Fill..........4.3 quarts[2]Automatic Transmission, Total Fill3 speed THM400, 75..........11.0 quarts3 speed THM350..........10.0 quartsManual Transmission, 3-SPD..........3.0 pintsManual Transmission, 4-SPD..........8.0 pintsDifferential, with 8.5 ring gear Rear..........4.2 pintsDifferential, with 9.75 ring gear Rear..........5.9 pintsDifferential, with 10.5 ring gear Rear..........6.3 pintsDifferential, with 8.8 ring gear Rear..........3.6 pintsDifferential, with 12.25 ring gear Chev Rear..........14.0 pints1. When replacing filter additional oil may be needed. After refill check oil level.2. With the ENG at operating TEMP, shift TRANS through all gears. Let ENG slow idle in PARK for at least 3 minutes. Check fluid level and add fluid as needed. Do not overfill. Good Luck and Remember.Change Your Mind, Not Your Oil.Use the First In Synthetic Motor Oil's.See My Bio For more information. I was told you need 5 Qt's as if you were just changeing the oil and filter,then start the engine,make sure the Transmission is good and warm change into all drives[1/2/D/N/R/P] then pull the dipstick and see
What transmission should you use for a Chevrolet 350 small block?
For an automatic a Turbohydramatic (THM 350) should fit the bill. If you find a THM 400 it is a bit stronger with a shorter first gear for quicker launches. Manuals you're gonna have to match to the year, but you should be able to find many 3, 4 and even 5 speeds. whoever said that the thm400 is stronger is a bit retarder b/c i ran a turbo 400 in my race truck for two weeks and it basically stripped all the gears out of it and blew it to pieces... i was told to try the thm350 and after the new 350 transmission has been in the 800 rear wheele hp truck i have had no problems even running it on the street every once in a while.... the 350's are notoriously stronger even though the 400's were designed to be stronger and faster with the shorter first gear the 350is an all around better pick
Will a Chevy big block fit on a 700 r 4 transmission?
Sure, it'll fit. But it won't last very long. The 200R4 and 700R4 were engineered for the torque output delivered by a small block engine. Unless you get it built up to match up to a big block - and that customization is NOT going to be cheap - that big block will kill that 700R4 quick. The 700R4 became the 4L60, and, with the addition of electronics, then the 4L60E. You'll notice that, on corresponding years to the 4L60E, anything with a big block, diesel, or even a 3/4 ton and heavier van or pickup with a small block will have the much sturdier 4L80E. If you're swap an OD transmission in place of a direct drive (such as a THM400 or THM450), you're much better off installing something like a Gear Ventures overdrive kit.
