September 26, 2005ok i just got a new rear axle with 4.11s in it got a front axle with a stamp of 45-10 in it i was wonder what would happen if i threw it into 4wd-i got 38s on it if it matters ok i read the stamp wrong it says 45-11 which corresponds to 4.09 gears so that wouldnt make that big a difference would it?
September 26, 2005if you put it in 4x4 with a different gear in the front then in the back, dont expect to get very far, after you move about a foot it will be like you have your foot on the brake cause they are turning at different speeds, and your transfercase will start making all sorts of banging clanking sounds. ive actually done this before, i had a 273 in the back and 373 in the front and a offroad club run was coming up and never got around to swaping out the front axle so i just put on a set of bald 33s and went. i just took it out of 4x4 on the straight aways and put it back in 4x4 at the start of a mud hole.
September 26, 2005not a good thing to do, you'll break stuff !!!
September 26, 2005One word- clunk, pow, pop, snap, wham, bang, boom, cluthunk, clurplunk, ting, knock.........< pick one
September 27, 2005I believe you need to be within 1 % of each other in order for you to not totally screw everything up. And according to my calculations 4.09/ 4.11 = 99.51% so theoritically you should be fine.Double check with Brent ("apbt" and some numbers), and let us know.
September 27, 2005I have 4.88 gears with 38x14.50x16 and it runs great!!!!!!!!
October 2, 2005
I believe you need to be within 1 % of each other in order for you to not totally screw everything up.
1% difference is correct. As long as you're within 1%, you won't have driveline binding issues. You can be as much as .5 - 1% off just running mismatched tire pressures even with matching gear ratios front/rear!
If you have one axle with 45-10(4.56) and one with 45-11(4.09), you're going to break your u-joints the first time out(if you're lucky and don't do more damage than that).
If the rear axle definitely has 4.11's(I would double check) and the front has 4.09's(45-11), then you're well within a 1% difference and should be fine!