Q. How do I identify my TH350 transmission?
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.
Q. Where is the transmission ID number?
Open the driver’s side door and find the white card on the side of the door that is filled with small black lettering. This card contains specific details about the year the car was made, its transmission, engine specifications and other details. Underneath or beside the “TR” symbol will be a number code.
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Q. What are the parts codes on a TH350 transmission?
Locate the stampings on the side of the transmission. The TH350 had part codes M33, M38 & M39. The TH350C, which is a TH350 with a lock up torque converter, had part codes MV4, MX2, MX3 & MX5.
Q. When did the GM TH350 automatic transmission come out?
GM TH350 Automatic Transmission The TH350 is an automatic shift, three-speed transmission. It is widely considered to be one of the greatest of automatic transmissions ever built. The TH350 transmission was introduced in the 1969 model year as the successor to the GM Powerglide automatic transmission.
Q. How can you tell if transmission oil pan is TH350 or TH400?
However, you can tell if it is a TH350 or TH400 depending on the transmission oil pan’s shape. If the pan is square in shape and looks five-sided due to a cut in one corner, then you are dealing with the TH350.
Q. Are there any other variants of the TH350?
On the contrary, the TH350C, a variant of the TH350 that has a lock-up torque converter had codes including MV4, MX2, MX3 & MX5. Asides from this, other variants of the TH350 were launched and these are the TH200, TH200C, TH250, TH250C and TH375.
