what size is the rear end???

[big black excursion]

i know my gear ratio is 3.73, but what size is the axle... is it 8.8", 9.75", 10.25", i have the stock axle... does anyone know???

[powerstrokekiller]

sterling 10.25 most likely I think.

---

Last edited by powerstrokekiller : 10-30-2005 at 10:00 AM.

[big black excursion]

thats what i kinda figured but i was not sure, i wanna get my rig regeared closer to stock, im losing too much power with the lift and 37's. thanks.

[powerstrokekiller]

yea you really need to at least move up to 4.10's maybe 4.56's

[big black excursion]

i was lookin at 4.30 or 4.56, just have to decide which one, is it something you can do your self or would it be better to take it in to the shop and have them do it.

[powerstrokekiller]

you could do it yourself with the right know how...But it would be better to take it to a professional shop to have them install it.

[jwiger]

okay looking at your stock sized tires (LT265/75R16) and if the tranny would stay in 3rd gear (1:1 ratio) your stock set up would have you spinning roughly 1,950 RPM to travel at 50 MPH. So looking figuring in your 37 inch tires here is a list of RPM related to the final drive ratio when driving in 3rd at 50 MPH

3.73 = 1694.3 RPM - What you have now
4.10 = 1862.3 RPM
4.30 = 1953.2 RPM - What I recommend
4.56 = 2071.3 RPM
4.88 = 2216.6 RPM
5.13 = 2330.2 RPM
5.38 = 2443.8 RPM

Here's the references for the front axle http://www.reiderracing.com/dana60r.htm

and here's a link to Randy's Ring and Pinion for you.

[bdcnst]

If your goingg to switch you might as well put a limited slip in it if you don't already have one. That was the only option I wish I had on my my excursion with all the wet leaves falling in oregon right now I slip on them all the time and my old chev had a govlock that kicked in at all the right times and was disengaged when I didn't. I want to put one in my excursion bad