Have i destroyed my diff?
Turbo Mini Forums

Hi everyone,
I was driving home tonight and i could hear a rumbling noise coming from the floor, so i backed off the throttle and let the revs and speed drop. The noise slowed down as speed and revs dropped. At first i thought it was grinding a bearing or something, so i put the clutch in and revved it with no load and the noise stayed the same. So i rev matched to 4th and accelerated and the noise got louder and faster. I babied it home (about 2k's) and have parked it until i decide what to do.
There was a bit of play in the passenger side wheel bearing so i swapped that, but the noise is still there. I couldnt feel any play in the drivers side, but ill be changing that bearing too asap.
The thing that worries me is there is about 5-10 degrees of free slack in the wheel before i can feel the diff engage.
Its got front drums and rubber uni joints.

Are there any other ways i could determine the problem? The engine and gearbox were recond 10 000 ks ago, so im really hoping it isnt broken.
Thanks for your help,
Joe

In boost we trust

What diff is in there? standard or 4 pin?

what sort of power is being put throught it?

Sorry, i just edited from a non-turbo mini forum.

Its a stock 998 on a stock diff for a mk1. The whole lot is also 40 years old, so its due a replacement.

In boost we trust

See if the inner joint of the shaft is hitting the exhaust

Paul

I seriously doubt it!

i stripdown will reveal all !!

Just to clarify, The noise is still there when revved with the clutch disengaged?

Yes i moved to the darkside

Instagram @jdm_brett

No it doesnt make the noise when i sit there and rev it.
It also doesnt start until about 30 mph, but its hard to tell as i dont have sound deadening.

In boost we trust

As Paul said could be the inner rubber x bush on the driveshaft