Rebuilding The Popular GM 700R4 Automatic Transmission

GM 700R4 Automatic Transmission
 

The guys from Detroit Muscle rebuild the popular GM HydraMatic 700R4, a 4-speed automatic transmission with a 30% overdrive in 4th gear.

The development of this transmission was primarily targeted to improve fuel economy, and this was accomplished by a number of modifications, not the least of which was the 30% overdrive capability.

700R4 Transmission Specifications
HydraMatic 700R4 Transmission Pan and Basic Specifications

The 700R4 was used widely on both truck platforms and rear-wheel drive car platforms. Some of the popular trucks it was used in were the Chevrolet Blazer and Suburban and the Oldsmobile 350 diesel. This transmission was also used in the Chevrolet Camaro, Corvette, Impala, and many others.

The guys offer tips and tricks on how to rebuild, upgrade and bulletproof a GM 700R4 automatic transmission. They also take a brief side-trip to the Tri-Five Nationals In Bowling Green, KY in this episode.

0:00 – Intro
0:23 – GM Transmission Overview and Differences
2:15 – GM 700R4 Disassembly
8:35 – Internal Part Teardown
9:20 – Tri-Five Nationals In Bowling Green, KY
12:36 – Switching The 700R4 To 2WD and Reassembly
17:12 – Console and Stereo Upgrades