Dana 80 Limited slip limits

[ws6 blackbird]

What are the limits of the factory Dana 80 limited slip in a drag racing high torque application? Will a 4 series factory limited slip or detroit locker work with 3.31 r&p ?

 

[ARbowhunter7]

Spiders went first for me, very early on. They are a known weakness; it seems the 80 has the same ones used in the 60.

And I don't think you can get a Detroit for a D80 that's geared that high.

 

[Supershafts]

You could use the TT version or the arb w/3.31

 

[ninerqb8]

Yeah I think I made it 3 pulls before I shot spider gear chunks through the cover. If you can afford it go with something better.

 

[bigstacks95]

My Dana 80 posi grenaded too. I think it was just the 4th pull. I now have a welded stock carrier. It works great and hasn't given any trouble (yet) so you could go that route if you have no plans for driving on the street.

 

[ClamDigger4]

I destroyed mine 3 years ago when truck was around 500. Spider gear bout came threw rear cover. Spooled now

from phone

 

[sledshaker]

I ran mine for years and never had a problem with it. Truck pulling and pulling a overloaded GN.

 

[zstroken]

Ran an open welded carrier for half a season, got tired of the terrible turning, put a limited slip in for just a little more street ability. It broke the first hook right at the line. LOL I didn't realize it, it just popped at the line, figured it was something like the chain, next hook noticed it was jumping and popping.

 

[ARbowhunter7]

So what's the best option for a street truck (best driveability)?

 

[Ghostman]

ARB?

 

[ARbowhunter7]

ARB?

I've heard people say they're weak in a D80. I'd like to avoid a compressor, but the OX isn't made for the 80, as I recall.

 

[BluegrassDiesel]

I had really good luck with the Detroit TruTrac.

 

[zstroken]

I had an ARB in my D80 in the puller.

First one with the 3.54 ratio, ended up spinning the bearing on the driverside carrier(on the carrier, just needed like a $120 piece to fix) second one ran for 2.5 years in a puller, and it finally grenaded the internals. I would say it held up pretty well. I know of a 3rd ARB that sheared right at the drivers side carrier bearing.

All 3 of these units lasted several years in a high HP pulling truck.

 

[ARbowhunter7]

I had an ARB in my D80 in the puller.

First one with the 3.54 ratio, ended up spinning the bearing on the driverside carrier(on the carrier, just needed like a $120 piece to fix) second one ran for 2.5 years in a puller, and it finally grenaded the internals. I would say it held up pretty well. I know of a 3rd ARB that sheared right at the drivers side carrier bearing.

All 3 of these units lasted several years in a high HP pulling truck.

That's good to hear. I need a very streetable option, and the ARB is looking like the route.