How to tell if you have an LSD?

[epmedia]

That's the opposite. An LSD is designed to resist the rear wheels moving independently. An open will let the wheel spin in the above test with only the resistance of having to move the diff & driveshaft.

I edited my post. I don't know what I was thinking. I've been a little 'off' since I quit drinking beers almost 2 weeks ago...

[pommeree]

i edited my post. I don't know what i was thinking. I've been a little 'off' since i quit drinking beers almost 2 weeks ago...

quit drinking beers!? Are you mad!?

[epmedia]

quit drinking beers!? Are you mad!?

I was being abusive with them for far too long, then I finally got sick from it. I had to quit

I'll have an N/A Becks every now and then, They're pretty tasty. lol

[MortyCrock]

I was being abusive with them for far too long, then I finally got sick from it. I had to quit

I'll have an N/A Becks every now and then, They're pretty tasty. lol

Props, man... I know that's not easy.

[Heretic E21]

This is too much reading....

Open Diff


LSD

[Thecatmilton]

This is too much reading....

Open Diff


LSD

This is why I am confused. It consistently leaves two marks, but acts like an open diff in the air.

[Heretic E21]

^ On that note, the BMW open diff works very well. When I got my car gifted to me about 5-6 years ago from my step father (been in the family Since '99) he was sure it had a LSD in it, but I soon learned it did not. (It does now )

[Manny G.]

LSD has a giant white "S" painted on to the case.

[mossyoaks]

LSD has a giant white "S" painted on to the case.

I recently discovered a giant white S on the diff case on my 92 e34 Touring!

[320iAman]

I was being abusive with them for far too long, then I finally got sick from it. I had to quit

I'll have an N/A Becks every now and then, They're pretty tasty. lol

I never quit drinking beers, I just dont drink any

Randy

[Bimmerfan84]

Alright so this still has me a bit confused my 92 e30 when I spin one wheel in the air the other does not spin either direction......... when I spin the driveshaft both wheels spin. ???????????

[82eye]

wrong test. driveshaft will always spin both if there is enough resistance in the diff no matter if lsd or not. sounds like your diff is open.

definitive test. 2 people required.
get back of car in the air.
have one person hold one tire to keep it from spinning.
spin other tire by hand.
if the tire that is held does not move, or can be turned in the opposite direction = open diff
if the tire that is held cannot be held still, cannot be moved in the opposite direction, and turns the same direction while being held = lsd.

if purchasing an lsd pop the cover off the rear and visually confirm.

if still confused then car does not deserve an lsd.