Please help:
I have a 96 Discovery, 4.0, AT, NAS.
While traveling down the highway at 25 MPH I heard and unsettling noise from the rear. I immediately hit the brakes and threw the car in neutral as the diff made a LOUD clunk. I put the car back in drive and heard some grinding. Not good.
Actuated the diff lock and limped home. I did not hear any more grinding for the rest of the ride.
I was able to get the diff off the car and low an behold the planetary gears took a crap. After a complete inspection...
The ring appears to be in good shape, no missing or mangled teeth. The pinion on the other hand and 5 chipped teeth, not too bad just a little at the top where it makes contact on the inside of the ring. Again... the ring is in good shape no teeth missing.
Questions:
Should I replace the pinion? I can see if it was worse, but... I don't want to be in this predicament later.
Locker, LSD or stock? I am a moderate off roader and it only makes sense to upgrade to a locker at this point. I am to understand that the Detroit locker is far stronger than stock. I have a LSD in the front already with no problems.
Any suggestions?
Thanks.