Jethrro

What was the factory option for the Limited slip differential. In the past the vehicles equiped with spicer/dana axles tended to have a Power Lok or a Track Lok (the crappy jeeps that I have owned and own now), Is this the same for the cummins as well. I figued that I could get away without having it right away but I need to get someting sooner than later. Thanks Jethrro

rockjeep73

Dana Power-Lok was the factory option and from what i have read its the best there is

rockjeep73

By the way, thats a beautiful truck you have, I like the colors!

limitedslip

I changed my differential fluids to synthetic 75-90. Don't I need to add a friction additive for the limited slip to function properly.

wannadiesel

Some gear oils already have it added. If you don't have any additive in there and it's not making crunchy noises on tight turns, the clutches are probably shot. Not a big deal, they are about $50 and a few hours work to replace.

Jethrro

Thanks!!! The truck was a total loss by insurance standards. Six months of long weekends now the prior owner wants it back so he can hit another dump truck. Jethrro

Underpsi

Are you sure your right with that? Wouldn't it be If you don't have any additive in there and it is making crunchy noises around tight turns, the clutches are probaby shot? The power loks don't make sounds going around corners.

wannadiesel

When I rebuilt mine and took it for a ride to see how much more additive it wanted, it was pretty crunchy until I dumped in the rest of the bottle. I used half the bottle soaking the clutches before the build. After I dumped the rest in and did a few more figure 8's, it quieted down nicely. The additive actually helps the clutches slip easier, so the less you have to run to quiet the diff, the better.

Begle1

I would assume that this "Dana Power Lock" stuff is only with the 3.54's and up?

I'm out of luck with just about everything on the 3.08's, correct?

wannadiesel

The trucks were avalable from the factory with power-lock rears, but the 3.08 carriers are no longer made. They were a special Dodge only part. Unless you can find a factory 3.08 power-lock rear, you are SOL. AFAIK your only option is the setups that fit inside an open diff and convert it to an LSD.

jughead

it has been a few years but i bought mine from drive train specialists. wasnt a dealer item then. it was 800 bucks cheaper than the dealer. had new departure on the box it came in. have won money with it. one wheel in wet grass other on dry pavement on 8 percent grade spun both wheels smoked the one on pavement.

Underpsi

I see what yor saying now, I understand. When I put my new unit in like two weeks ago I just put the whole bottle in right away and it worked fine so thats why I was like

Begle1

So they did make a 3.08 with LSD, did they?

Could any of you fine gentlemen tell me how to tell if a truck has one on it?

Is there a way to tell from the VIN number?

wannadiesel

It will say on the build sticker under the hood, and also on the ID tag on the rear. Look for the letters "LS" after the ratio.

AFAIK, you can't tell that from the VIN.

Begle1

Cool, cool...