How to identify the transmission on a GM car?

So, whether you are heading out to check out a “For Sale” ad that could be your next project or trying to make heads or tails of a junkyard find, the following charts can be useful guides when it comes to GM transmission identification. The easiest method of GM automatic transmission identification is to examine the transmission pan.

Where can I find the transmission model number?

Try Searching For Your Transmission Model Number Here! If you notice that your car is dripping a red fluid, that is most likely transmission fluid. Check on the ground where your car is normally parked.

How can I tell if my car has a 4 speed transmission?

As mentioned above, modern 5-speed and 6-speed manual transmissions are easy to identify, but older 4-speed transmissions have more variety. While there are no distinctive pans and bolt counts to make transmission identification simple, 4-speed manual transmissions can be generally identified by examining the side profile.

What is the transmission number on a Chevy?

THM375 – This transmission is a derivative of the THM400 sharing the external appearance of the 400. It’ll be marked 375-THM on the bottom of the tailshaft housing.

Where do you find the VIN on a Chevy transmission?

Others have a tag rivited to the case. Most transmissions will have a “source serial number” (chassis vin) usually found close to the transmission code. This number will contain division ID #, model year, assembly plant and production sequence (last 6 digits) of the VIN stamped onto the transmission.

What kind of transmission does a Chevy Chevelle use?

THM200 – Light duty, “metric” 3 speed transmission. THM250 – Used in small 4 cylinder cars (Vega, Sunbird, Monza) from 1973 to 1981 and some Nova/Camaro/Chevelle 6 cylinders in 1974 & 75. The 4 cylinder models have 4 large cooling holes near the torque converter, while on the “bigger cars” there are no cooling holes.