Sep 12, 2005 · The 2004-2006 GTO. 2004-2006 GTO General Discussion '06 or '08 GTO? Jump to Latest ... '06 or '08 GTO?

Apr 1, 2005 · 2004-2006 GTO General Discussion ...

Sep 23, 2024 · My ‘70 GTO has an Eaton posi with .3.55 gears. 10 bolt. Not good on the freeway, 3000rpm at 60mph. Too high for most of my driving. My local gear shops told me the Eaton …

Feb 22, 2005 · 2004-2006 GTO General Discussion ...

Feb 13, 2025 · My ‘70 GTO has an Eaton posi with .3.55 gears. 10 bolt. Not good on the freeway, 3000rpm at 60mph. Too high for most of my driving. My local gear shops told me the Eaton …

A forum community dedicated to Pontiac GTO owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, history, and more!

Nov 5, 2024 · Had a differential change 2 months ago, added Posi track. 2 months later Ring/Pinion went south. Thought it had a 3.55 gear ratio, turns out its a 3.08. Can't find 3.08 …

Nov 18, 2024 · In driving and owning first gen GTO's for 45+ years now, my pick for a 4 speed GTO that is highway driven a lot would be a 3.08 or a 3.23. I had 3.36 gears installed in my …

Feb 1, 2025 · Personally I would run the 3.08 and the torque converter given to you. The stroker engine will have enough torque to vaporize the tires and freeway cruising will be great. Also …

Mar 30, 2008 · You're right about the RPM's, Rukee. But a 421 rev's lower than a 389, and makes more power at lower RPM's. While a 3.55 is the standard gear for a 389 equipped stickshift …