How do I identify my TH350?
How do I identify my TH350?
Look for the vacuum modulator. It will be on the side of the transmission and have a rubber vacuum line attached to it. If this fitting is on the right front of the transmission, you have a TH350. On the similar TH400 it is attached at the right rear of the transmission.
Where is the Chevy 350 TH350 transmission made?
The 350 and its 250, 250c, 350c and 375b derivatives have been manufactured by Buick in its Flint, Michigan, plant and by Chevrolet in Toledo and Parma, Ohio, and Windsor, Ontario. Both Chevrolet and Buick divisions produced the TH350.
When did the GM TH350 lock up converter come out?
At the right rear of the case is the modulator. The TH350-C was the lockup torque converter version introduced in the late 1979 model year, and was produced through 1984. This later version had an electronic lock-up converter to increase fuel-efficiency at cruising speeds.
Which is better Chevy TH350 or 400 Trans.?
Very expensive to build up to higher power handling levels, as compared to a TH350. The TH350 has far more high performance parts available at reasonable costs. The 400 trans. is not a practical choice.
Is the 700R4 transmission the same as the TH350?
The 700R4’s drive shaft yoke is identical to the TH350’s, so your old yoke should work nicely with the new transmission. The 700R4 was produced after all of GM’s engines went to the “corporate” Chevy pattern, which means that the transmission has a standard small-block Chevy bolt pattern.
When does a Chevy TH350 engine start to break?
J.C Beattie pointed out that the input shaft is somewhat a weak point in the TH350. It’s fine up to 600 hp, but if your engine is putting out any more than that it will break. The TH400 also suffers from the same problem, but doesn’t break until the 800 hp mark.
What kind of transmission does a Chevy TH350 have?
This “BOP” version features a “valley” at the twelve o’clock position of the block flange where the peak would be on the Chevy (pictured) version. The top dog of cool TH350 transmissions is the TH350C Unicase version, featuring both a Chevy / BOP pattern and a lockup torque converter.
At the right rear of the case is the modulator. The TH350-C was the lockup torque converter version introduced in the late 1979 model year, and was produced through 1984. This later version had an electronic lock-up converter to increase fuel-efficiency at cruising speeds.
How big is the torque converter on a Chevy TH400?
This also included a change in the torque converter diameter and flexplate attachment pattern. The large diameter converter pattern for the TH400 is an 11.5-inch pattern, while this new LS converter pattern is slightly smaller at 11.1 inches.
