HELP! rear end shaking

[zeevann]

hey stangnet, i am asking for some help because im stumped. Lately while turning and going forward or backwards, my rear end shakes and clunks badly. Its like the whole axle is shaking. i can't figure out whats causing it, re torqued my rims and its still doing it. its scary....... please help

 

[mazen189]

check your tires, one, or both might be defective,

a way to tell is if your tires have developed a bubble on them, this bubble will cause that whobbly feeling when driving at low to higher speeds.
but my guess is that its your tires, check them.

 

[zeevann]

let me explain a little better, the only time it does it is when backing up turning or going forward turning, but i have to be going slow, its like they are locking up and there a clunk and the whole axle rattles. my brakes aren't locking up tho. we were thinking possibly a u joint? checking later tonight. But another idea floating around is that the gears chipped a tooth, but i figure it would do it all the time(my friends like to think the worst)

 

[trinity_gt]

let me explain a little better, the only time it does it is when backing up turning or going forward turning, but i have to be going slow, its like they are locking up and there a clunk and the whole axle rattles. my brakes aren't locking up tho. we were thinking possibly a u joint? checking later tonight. But another idea floating around is that the gears chipped a tooth, but i figure it would do it all the time(my friends like to think the worst)

It's your differential, specifically, the "traction lok" limited slip portion of the differential. The clutches are chattering, releasing and grabbing as the diff tries to do its thing with the inner and outer wheels turning at different rates as the car turns.

If you've had the oil changed recently, this can happen if no friction modifier additive was added to the new fluid. If the oil is old, replace it with a 75W140 synth and add a bottle of friction modifier (get this at a Ford parts counter...)

If that doesn't do it, you're probably looking at a limited slip rebuild.

 

[squeak93]

It could also be a bad outter wheel bearing. They are known for clunking around turns.

 

[1stanger1]

It's your differential, specifically, the "traction lok" limited slip portion of the differential. The clutches are chattering, releasing and grabbing as the diff tries to do its thing with the inner and outer wheels turning at different rates as the car turns.

If you've had the oil changed recently, this can happen if no friction modifier additive was added to the new fluid. If the oil is old, replace it with a 75W140 synth and add a bottle of friction modifier (get this at a Ford parts counter...)

i'm with this guy except for one thing i wouldnt go to ford to get it too expensive they sell a limited slip additive at your local parts store i.e. autozone napa advance etc.

but it sounds to me like a limited slip deal but if it IS bad then why not use this as a chance to upgrade your rear??