sinneDBTB

front ifs diff in my yota is gone, but i have a 4.88. will my truck blow up if i use the 4.88 in the front with the 4.56 in the rear?

peow130

your xfer case will if you use 4wd.
go find a 4.88 rear from another pickup with the 8" 3rd..

vinnymac

Ooh, bad idea. I have had experience with this myself. I had (still have, but totaled) a 98 4runner. Upon replacing the rear diff with an E-locker, I was too drunk (oops) to count the teeth on the ring and pinion. I put a 4.30 in the back and still had a 4.10 in the front. For some reason, I kept breaking CV joints, only about 5 of them. It wasn't until I had to flat tow the 4Runner home, with the T-case neutral ( auto transmission), on night after a stick went through the radiator and auxilary transmission cooler that I figured out what I did wrong. Don't ask me why I didn't check the C/TR code on the door jam. Sheered every tooth off of the ring gear, killed every roller bearing in the driveline (Rear axles, front hubs, pinion, T-case output, all rear drive shaft U-joints, front diff output on the passenger side, front pinion seal, both front axles and the rear tires). Don't run different ratios!

sinneDBTB

nuff said. will find a rear 4.88

highonpottery

iTrader: (1)

i'm sure in an EMERGENCY situation where you DON'T have a lot of traction (like a mud hole), using 4wd with that combo would be ok for a very brief time period. spacejunk did it in his 4runner, but the other way around (4.88 rear + 4.56 front). a high traction situation (like rock crawling) would be BAD and things will definitely bind due to each axle moving at a different rate.

i'd put the 4.88s in and keep it all unlocked until you can find a 4.88 rear. lets face it, everyone will eventually want bigger tires

TNRabbit

it will explode in a spectacular fashion, showering your fellow 4x4-mates with bits of rubber, metal & FIPG...

Matt16