The 700R4 transmission from General Motors continues to be a reliable and sought-after automatic gearbox more than 40 years after its introduction. Used in all manner of cars and trucks, the GM ...

Read how Jimmy Nylund of Four Wheeler shows how to upgrade the TH700R4 GM transmission so it can handle 850 horsepower.

Check out a rebuild of a 700-R4 automatic transmission by Bowtie Overdrives for a 1988 Pontiac GTA. More details and photos only in High Performance Pontiac ...