Rear Differential Rebuild/With Pictures

[z122643]

Now that I've got someone's attention. Anyone know how to get the pinion out?

[jute91]

http://www.r3vlimited.com/board/showthread.php?t=211891&page=8

you will find out it there :)

[nando]

is the VC working? going to rebuild/replace it?

my VC is dead - a new one is about $500. considering picking one up before they go NLA forever..

[Wh33lhop]

is the VC working? going to rebuild/replace it?

my VC is dead - a new one is about $500. considering picking one up before they go NLA forever..

Or you could just get a clutch type...

[nando]

I could, but BMW used a VC back there for a reason - to some extent a clutch diff still needs one axle to have a load on it. a VC doesn't.

[z122643]

So, for the pinion just dead blow it out?

I got this from a salvage yard from a iX with 94,xxx miles. but some idiot removed the cover and left it off. That's why there are small rocks inside.

VC works. In order to better clean it, can I take down the LSD or should I leave it alone?

[nando]

if there's crap inside I'd want to clean it out. it means you have to redo the pinion crush sleeve. make sure you mark the hex nut before you remove it - that way you can put it back to the same depth as it was before (might want to do a search on this first).

I made the mistake on one of my diffs of taking it completely apart before I realized I could have marked the nut before I removed it..

[z122643]

I'm debating whether or not to remove the pinion.

[DER E30]

Kool, I need to do that to my 4.27 lsd... it's stupid loose :(

[flyboyx]

for your purposes, i would not remove the pinion if i were you. i would just clean it really good, replace the seals and put it back together.

[z122643]

So, I did not remove the pinion and just decided to replace the seals. Cleaned up nicely.

Also does anyone know what the "P" stands for?

[Sean]

How do you guys know that the VC in the diff is going out? I think mine is likely shot...but not sure.

[nando]

I think in neutral if you jack up one side of the car, you should be able to turn a rear wheel and it should be stiff.

I think mine is done because of the way the car reacts under throttle, it doesn't throttle steer as it used to and over rough surfaces I can't put power down. but it has 250k+ on it..

new ones are in the ballpark of $500.

[z122643]

Car must be in gear with the front wheels on the ground. Then try turning one of the rear wheels, it will be very stiff and will slowly (very slowly) rotate the opposite wheel is the opposite direction.

If dead if will just spin the opposite wheel with no resistance.

[Sean]

Ok, so, basically, it will act like an open diff is the VC is bad. If it requires a lot of resistance, but starts to slip at all, it's on it's way out. I have two LSD's, one in my car and one sitting in storage - I'll have to check them both out.