3.89 or 4.11 gears?

[carbuff]

I made a choice to go the other way this year. I have a shorter tire (315/30/18), and I went from a 3.89 to a 3.64. I liked the drop of RPM for the highway driving, but move significantly, it gave me more RPM range in 1st and 2nd gear during my autocross driving.

2565 seems high for a highway target. I was around that before, and I dropped to 2250-2350 now, and that seems better...

[TheJDMan]

I'm running a 9" with 3.89 gears, 26.5" tall tires, T56 with the .80 and .65 OD gears. This ratio is perfect IMO. I can cruise the two lane back roads in 5th gear at 65mph and 2500rpm. Or I can get out on the interstate and run 75 at the same 2500rpm. I think a 4.11 would be too low. I previously had a 3.64 and I felt it was too tall for my taste, I never used 6th gear.

You might also take a look at Roush Used Racing parts. They sell all manor of surplus NASCAR parts including 9" center sections.
http://www.sriperformance.com/Used-R...rain-s/428.htm

[68LS1]

I have 4.11 gears, T56 with 26.7" tires. This works fine, but I feel first is too short.

I would go with 3.89

[will69camaro]

If you decide you want a 4.10. Maybe we can work a deal. I have a DSE rearend with no miles. It's 31 spline trutrac also.

[Vegas69]

3.89 or higher... With any reasonable horsepower, a 3.89 will be plenty low and make first gear a trick to keep hooked up.

[71RS/SS396]

For a vehicle that's going to see mostly street cruising I would opt for a 3.70 or less.

[ADY]

For me I switched from 3.73 to 4.10 and it made the car a lot easier to drive on the street. Agree that first gear is a little short now, but with 3.73's, sixth gear was useless unless I was going faster than 75 mph and was on a flat road.

I have the T-56 with 2.66 first gear and a 383 SBC with a aggressive cam, so I personally needed the higher rpm.

[will69camaro]

For what it's worth, I have the motive gears (4.11) out of my DSE rearend that they built. I went to a 3.50 for turbo car as mentioned before. I'd make someone a smoking deal on them They're "new" as they've been installed but have never had power put to them.