I'm throwing this up for a friend.

so quick description of the situation

After a very hot track day on R compound tires and his fastest times in the car his lsd started making grinding noises and started "slipping"

the car is fine for street duty but track driving is a big no go at the moment


so after a lot of reading, we've yet to find a solid answer

what exactly needs to be replaced? / what is known to break in the ap1 diffs?

am I correct in thinking he can't just get away with buying a new diff, he needs a housing or other parts in general?

 

The factory LSD is a none serviceable part it is sold as a unit. The cost of a replacement factory LSD is as expensive as a quality clutch type that would be a better replacement.

Does the rear grind on turns, going straight or both? If the car grinds going forward/straight then, it may not be the LSD but, the gears or CV axle.

 

it only grinds on turns,

I found an ap2 diff on here for a good price

any problems installing an ap2 diff in a ap1?

 

You must change the input flange...PM me for detailed instructions on doing this change out. If not done correctly you will have to take the rear apart and replace the crush sleeve.

If your friend plans to race the car that hard it maybe a good idea to look into a better LSD.

 

pm sent


Thanks