jwahl16
10+ Year Contributor
- 428
- 3
- Oct 26, 2009
-
Havertown,
Pennsylvania
I have read about the taller 5th gears for manual transmissions that help to bring the rpms down at highway speeds. I was wondering if IPT or someone has made anything for automatics to help lower the rpms. It would be a great gas saver! Oh, and i'm definitely looking for info on 4g63t trannys, not 420as.