Engine/Transmission (1994 - 1998) Do I have LSD???

[gwizpro]

Hi guys,



Used to be (at least I thought) that when you had both rear wheels off the ground and you turned one of them, with a limited slip differential that the other wheel would turn in the opposite direction.



On my truck, no matter what I do, both wheels will turn in the same direction when off the ground. I thought this meant that the rear end was NOT a LSD.



If I set her back on the ground and then brake torque her so she spins the tires, Both tires will lay rubber.



The identity plate under the hood says it has LSD.



What is bothering me is that sometimes when turning in parking lots and going slow, I get a slight shudder in the rear end, just as if one wheel is slipping on the pavement because one wheel is turning more than the other.



Could possibly be that the rear end is locked somehow?



I am not a pro at rear ends, so any help would be appreciated.



Thanks

The Rackman

 

[Lsfarm]

You have LSD

Rackman, you have LSD. What you describe about both rear wheels turning in the same direction is with LSD, not without.



The two rear axles are held together by a stack of clutch discs that have springs holding them together. So you have both wheels being driven at the same time, and the clutch allows the rear wheels to run a different speeds when you go around a corner.



the shudder you feel is the clutches slipping and grabbing as the outer wheel has to go faster than the inner wheel when the truck is turning.



Some folks don't like the shudder and will add some differential fluid conditioner to make the clutches slip easier. I prefer to have the clutches grabby like you describe. This way I know that both wheels are going to be held together as much as possible, but still allow some slippage when needed.



I hope this help explain the rear Diff for you.



Greg L The Noise Nazi

 

[gwizpro]

Thanks a lot, Lsfarm;



Now it makes sense to me, I also prefer to know that they are working like they should.



This is such a great place to get answers.....

Well worth the $ spent on membership... .



Again, Thanks

The RackMan