LSD Grinding

[whitewatermd]

All,

I just installed my LSD and am getting a harsh grinding/vibration at very low (Parking Lot) speeds...

Any thoughts?

[jlevie]

Is the noise only present when turning at low speeds? That could be from the clutches in the differential and a change of fluid might help. Redline 75w90 (which includes friction modifiers) is a good choice. But if the noise is present when going straight, a bad bearing or damaged gears are possibilities. You could also have a bad wheel bearing or bad half shaft.

[whitewatermd]

i notice it the most when turning....

The diff has brand new lucas oil 75w90 in it from when i installed it...

Dont notice it too much going straight unless i am slowing down coming to a stoplight...

[jlevie]

The description of that fluid doesn't mention friction modifiers for LSD application. That may be your problem. You can get friction modifiers, add that to the fluid, and see if it helps. Or you could change to a fluid meant specifically for an LSD.

[whitewatermd]

Interesting, now that i look at the description too, you are right... I could have sworn on the bottle that it said it was specifically for LSD's...

I will pick up some tonight and try that before i swap it back to the open diff...