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IIRC Positraction is a GM brand name.
Limited slip is the generic term for traction adding differentials.
If you rear axle is open, a LS will make a huge difference. My '87 dually has one and my '97 SRW doesn't. The '97 barely move in 2wd on ice or snow, while the '87 will go nearly as far in 2wd as the '97 will in 4wd.
get a carrier out of a superduty, the 10.5 is a direct swap and has a monster posi in it.
I feel like the LS in my truck works much better than my dads 6.blow which is a LS 3.73. Whenever I do a burnout it's two wheels no matter what the road conditions or road angle or whatever. But with his is a crap shoot whether it with be a one wheel peeler or actually be a LS system.
the disc brake rear's are harder on the limited slip during burnouts then the drum brakes are. its easier to overcome their holding force then the disc's. look at a diagram of the internal's of the 10.25 ls and the 10.5 ls. the physical weight alone is ridiculous. i would bet the 10.5 carrier is 30 pounds heavier then the 10.25 carrier and if i recall it has twice the clutches.
and yes, "positraction" is a GM name just like "hemi" belongs to chrysler...... even though ford and chevy have had "hemi" headed engines they are not advertised as such.
the same goes for rear's. they are all "limited slip's". GM calls theirs positraction while dodge's was the sure grip, and ford uses a traction lock.
Ahh I see, that makes perfect sense. So does that mean that when I do a rear disk conversion i'm going to become a one wheeler peeler? Cuz that would be a huge draw back.
Ahh I see, that makes perfect sense. So does that mean that when I do a rear disk conversion i'm going to become a one wheeler peeler? Cuz that would be a huge draw back.
It might be a draw back for burn outs but launching in 4wd you can now build 20+ PSI boost and still hold it back to launch.....Ask me how I know.....
That is a good point, I like racing as much as doing burnouts. How easy is it to hook up a line lock to the front brakes. Then I would even have to burn up my shoes or eventually pads in the rear
i can still burn both tires in my truck with the disc's via powerbraking but i prefer to save my rubber, its expensive to replace, i spin in the rain and mud and occasionally the snow when we get it. dry pavement is too hard on the tires
That is a good point, I like racing as much as doing burnouts. How easy is it to hook up a line lock to the front brakes. Then I would even have to burn up my shoes or eventually pads in the rear
If you are changing to rear discs then throw on an adjustable proportioning valve in the rear. Line locks are electronic, Prop valves are hydraulic. I like the 'lever' style better than the '****'...it's much faster to adjust. Be sure to turn the rears on before you launch.....did that once at the track....really hard to stop w/o rear brakes at 140+ MPH (Cuda not my truck LOL)
is it possible for limited slip rearends to wear out?
in the mud or snow i spin both rears but the few times i've done burnouts on the road
they are one wheel peels. Just curious, i'm not even sure of the code on the axle, and
can't check since truck is still at the shop getting tranny built.