cjsxj87
NAXJA Forum User
- Location
- Connecticut
I am on the debate on what gears to have installed in my axles. I have a 4.0, and an Ax-15 on 32s. I was wondering if anyone runs 4.56 gears with an Ax-15 on 32s? How is it? Thank you in advance.
I plan on running 35s with a D30 and D44.
What RPMs are you guys with 4.0 ax-15 and 4.56 gears running at 55, 65, 75.
With 33's, AX15, 4.56's.
55=2000k ish
65=2500k ish
75=2800k ish
With 33's, AX15, 4.56's.
55=2000k ish
65=2500k ish
75=2800k ish
Not bad.
Use this.
http://www.grimmjeeper.com/gears.html
When in doubt, gear lower. The 4.0 doesn't mind spinning some higher RPM's.
If you're unsure, run 1 gear lower on the highway (3 on the automatic, 4 on the manual) for a few days and see how it feels.
I ran 4.56 with 32's for a long time and it was GREAT. I'd spin close to 3k on the highway, but the 4.0 never minded and I did better than 20 mpg.
20mpg? I don't think I could get that if I was going downhill everywhere I drove. I got better mileage when I had my 3.73s in.