How to tell what gears you have.
Registered User
Joined: Jan 2010
Posts: 39
Likes: 0
From: FLORIDA
from the 3.9 you said you had on the diff tag I'd say you had the alternative 3.92 factory ratio....no good for 35" tires...to be able to drive and actually use the overdrive on your tranny and not have it constantly shifting up and down you would want 4.56 gears with 35" tires....everything would be returned to factory ratios thaen and even your speedometer would be correct again (if you have 31" tires it as well as your obdometer and mpg calulations are all off a bit...
Last edited by SPARKIEGIRL81; Jan 25, 2010 at 10:43 PM.
Champion
Joined: Apr 2007
Posts: 2,831
Likes: 1
From: Miami, Fl
you can run 4.88s with 35s it will give you more low end and you will lose top end(raise your cruise rpms) 4.56 would be close to stock
If you never are going to use 4wd why put the bigger tires? technically you could just do the back and as long as you never put it in 4wd you wont have a problem
But if it was me I would do both regardless and then I never have to worry
If you never are going to use 4wd why put the bigger tires? technically you could just do the back and as long as you never put it in 4wd you wont have a problem
But if it was me I would do both regardless and then I never have to worry
Registered User
Joined: Jan 2010
Posts: 39
Likes: 0
From: FLORIDA
Kinda wanna make it like a show truck. The plan is to jack the truck up and deck it out, so to speak, didn't want it to go in the mud. Have a project truck for that. My next ? would be if I regeared just the rear end with a 4.56 what would I need to put in the front gear later? same ? but with a 4.88?
Record Breaker
Joined: Jan 2009
Posts: 2,222
Likes: 4
From: NB, Canada
IF you were gonna ever re-gear the rear end and not the front, I would strongly suggest pullin the front driveshaft out of it since you couldn't use it anyways.... Then there is no way you could accidentally fack up the front
edit: you're in the right place if ya like big n loud
edit: you're in the right place if ya like big n loud
Last edited by Maxx_Magnum; Jan 25, 2010 at 11:24 PM.
Champion
Joined: Apr 2007
Posts: 2,831
Likes: 1
From: Miami, Fl
You would put the same ratio in the front as the back you have a 9.25 in the back and dana 44 in front I'm almost positive to put 4.56 or 4.88 in the front you need either a new carrier or thick gears
