They are all good for their intended purpose. The 700R4 has overdrive, so it can help with gas mileage, but can't withstand as much torque as a 350. The 350 is economical to rebuild, and can take a lot of abuse, but the 400 is the heaviest duty of the three. It can handle big, high performance engines with a lot of torque, but consumes more of the engine's horsepower because of it's higher reciprocating mass.
If you have a Chevy 5.7 liter almost all Chevy transmissions 700r4 th350 th400 etc will fit. You can run a newer transmission 4l60e 4l70e or 4l80e basically they are electric overdrive versions of the older th350 and th400. the 4l60 and th350 is the half ton. The 4l65e is the corvette transmission and th400 and 4l80e is 1 ton. I believe the 4l70 is 3/4 ton and some half ton trucks like the ss and vortec max. the newer style transmission would need a stand alone controller which they sell and a aftermarket flywheel which will adapt the 2. Although all the bolt patterns are the same the 4l series one bolt on the top wont match up but its not a big deal and there are thousands of them out there. Your best bet is a beefed up 700r4 they can handle up to 450hp and don't need stand alone controller and have an overdrive. I would recommend a 2000 stall unless you have a rock crawler.
A 400 Turbo, 350 Turbo, and a 700-R4 (TH400, TH350, TH700) I recommend a 700-R4, all around best transmission, and lots better mps's compared to the others
A 1986 Cutlass with a V6 engine typically uses a TH200-4R transmission. However, compatible alternatives include the TH350 or TH400 automatic transmissions, provided modifications are made to accommodate them. It's crucial to ensure that the transmission mount and driveshaft length are suitable for the specific application. Always consult a mechanic or a specialist for the best fit and performance.
Every reputable converter manufacturer will provide that information free of charge. I would not use a TH350 behind that big block. TH400 is a must.
if its the GTA with the 5.7, the 700R4 is, in my opinion, the best transmission out there.mine is amazing, shifts on a dime, has a low first gear, and really runs great with the 5.7
700R4,,,, NOT 4R,,,,, Its an overdrive tranny that has a very good locking converter, Its actually the best overdrive trans ever made by GM, It will shift on its own and locks up nicely. 88 to 92
TH400 or 4L80E if you want overdrive.
Consult with the torque converter manufacturer of your choice.
the v8 700r4 its a strong tranny its a overdrive tranny it will give you better Gas mileage
a 1983 silverado has an TH350, its a three speed tranny. its been said that it's the best transmission that gm has ever produced.
1981
QA1 makes the best.