Randy

There are 2 posibilitys.... the first is , if it is a 4 speed it is a THMR1.... which is the a4s310r.... which is also known as a 4l30-E. (made by G.M.) the other possibility is a 5hp-18.... which is a 5 speed. Quick I.D. is .....the 4l30 has 2 pans on... Login to read more.