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05 Z71 diff recommendation

This is a discussion on 05 Z71 diff recommendation within the Drivetrain forums, part of the LSx Technical Help Section category; I have the rare scsb Z71 and I want to make it a street racer. Plans in the works are ...

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    Junior Member Z28dryva's Avatar
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    05 Z71 diff recommendation

    I have the rare scsb Z71 and I want to make it a street racer. Plans in the works are a 6l80 swap and SS front end swap, as well as a turbo build in the distant future. My problems is what traction adder to put in the rear. I have had a lunchbox locker before and didn't care for it that much. I grenaded it due to wheel hop anyways and now I'm down to an open diff. I had the same exact lunchbox locker (powertrax) in a Jeep Cherokee and you couldn't even tell it was there. It of course didn't have auto 4 wheel drive, ABS, or such a touchy cruise control system not to mention half the power. I feel that all lockers are gonna have that slight amount of slack in it to operate correctly and I really don't want to use one. It freaks out the auto 4X4 system and the ABS and it makes for a bucking effect with the cruise on coming off loads going up and down hills. I'm not building a rock crawler or anything so I think a quality posi unit would be fine. I hear Auburn is the best but it's a clutch style and, as with all clutch styles, they wear out over time. I'm not too familiar with the torsion style but I have a similar one in my Trans Am. It seems to work fine for the most part but I noticed it will 1 tire fire from time to time if you are already turning and then get on it. I would think that a truck being more top heavy would be worse for pissing off the torsion style in corners. I have to do something before the winter cuz I'm not rolling on snow with an open diff so hit me up with your opinions and experiences so I can make a decision on what to go with.

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    Junior Member Z28dryva's Avatar
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    Ok let me help you guys out. I'm looking at the detroit trutrac or possibly full locker. I'm leaning toward the Trutrac since this is a primarily on road vehicle. Anybody have one? Break one? 1 tire fire one?

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    M6 King Hot Black Trans-Am's Avatar
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    I'm not a fan of the gear units, I'd go either tight clutch style or a locker. If your not concerned with smooth engagement on corners then locker is my pick. I would like to give the wavetrac a shot though.

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    Member Supershafts's Avatar
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    The true trac is fine, i have them behind all kinds of things, cars, trucks, 300hp 900hp and 1900ft lbs. Wavetrack is a gear design like true trac with a supposed added type of ramp locking feature between the side gears

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    Junior Member Z28dryva's Avatar
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    They don't even make a wavetrack for a 10 bolt or a 14 bolt. I've decided to put a diesel in my truck so it might be getting a 14 bolt soon after that and I'm not sure if I can get a tru trac for that rear end. I might end up with a locker but I'd like to steer away from it.

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