Under my hood it does not mention lsd. When i turn a corner and accelerate too fast, only the inside wheel spins, also i have done a burnout before and only one wheel spins. But, today we had snow and when i went to drive up my driveway both rear tires spun at the same time, and then later today when some of it melted i was backing up my drive way with one wheel on wet pavement and one wheel on the snow and again, both tires spun. I have not changed the fluid in the rear axle yet...so i do not actually know if i have limited slip, but i didn't think i did. Do you think that the previous owner put an aftermarket lsd, one like the stock clutch one, and the cluthes are breaking apart, which is making it not work that well?

Thanks

 

get a build sheet for your truck.. search "build sheet" and theres tons of info on how to get one.. there will be details on what your 9.25 has..

sometimes a warn out clutch pack in the trac-locs (lsd's) will mimic what an open diff does

 

You could also jack up your back end (both rear tires off the ground) and turn one of them. As you turn, watch the opposite wheel. Does it spin in the same direction (LSD) or does it spin in the opposite direction (open)?

 

I don't think a Limited Slip diff would do much anything different from an open diff, unless it's a locked differential.
So if you raise your vehicle, most likely the wheels will spin in opposite directions when turned by hand, regardless of differential.

Keeping in mind the term Limited specifically refers to the fact that only a small percent of differential pressure is applied to the tire with the most traction, while the one with the least traction still takes the brunt of the acceleration. Thus, it is very possible to spin one tire around a turn while the other holds traction and may even appear to be getting no pressure, even with an LSD.

I'm not sure what the percentages are, but as a rule I would lean in the direction of 5, 10, maybe 20%...
Keeping in mind that the higher percentages also cause excessive tire wear, and make the car harder to turn, any differential that applies 100% pressure to both tires is a locked differential and generally used for certain off-road situations only, as it makes the car unsafe to drive on highways.
Most manufacturers put in LSD's as a driving aid, and it's only a small % pressure going to the other tire.

On the note of wheel spins, I would assume if both wheels spin at times, that you do have an LSD.
The hard way to test it is if you have a winch, go stick one in some deep mud while the other remains on dry pavement, then try and get out (and use the winch if you can't lol).
The easy way is to assume you don't have LSD, and let it surprise you if it does.

 

Negative ... a properly operating LSD is solid until the friction of the clutch pack is overridden by the differential force of one tire trying to go faster (farther) around a corner than the other. LSD's take a bum rap here (as opposed to true lockers) because there are some hard-core 4-wheelers on board ... but I will tell you ... I have never seen one tire spin by itself on my truck.If one goes, so does the other ... and the rear end starts to come around on me. If only a "small percentage" of power was going toeither side, that would never happen.

 

diddo to tms bill. if one spins they both spin in a lsd

 

I have the trac-loc rear in my truck, and if i ever try to spin the tires from a stop, they both spin. Also most of the time they will both kick the truck out sideways when gassin it out of a corner. However, at times, mostly on right turns, my right tire will spin, not my left, and it sounds different. My friends 99' 2500 sport with a 5.9 is the exact same way. I got about 113k on mine, and he's got 85k on his.
Also, when the truck is up on the lift (Or jacked up) if you spin one tire, the other tire will spin the same way on the trucks with these rears.
One question though - I wana drop the fluid out of my rear b/c i dont think it was ever done in 113k miles. Whats the best fluid to put in and my truck also came with a small bottle of fluid in the glove box from mopar for the lsd i beleive. Not exactly sure what it is, and i'm assuming its added to the rear fluid. Does that go in with any fluid?

 

Hey , new to the board... Good lookin site. Hey I recently replace my LSD carrier with a new one and am somewgat happy with it. Have any of you ever put a Detroit Locker in a 9.25?? Wondering if those 31 spline axles can take it.





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That bottle is a friction modifier for your sure grip rear end. You need it too keep the cltch plates from chattering. I think you need two little bottles for the 9.25. OR some oil manufactures already add it too there oil, Just read the lable on the back.



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