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Rear end question

This is a discussion on Rear end question within the Drivetrain forums, part of the LSx Technical Help Section category; I've seen a lot of differing viewpoints on the various rear ends available to us. First, I'd like to know ...

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    Make real real sure Johns00Z28's Avatar
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    Rear end question

    I've seen a lot of differing viewpoints on the various rear ends available to us. First, I'd like to know which one is the lightest between the 12 bolt, 9" and Dana 60? Secondly, I'd like to know which causes less parasitic loss as I've heard different responses on that as well. And if you could provide proof rather than just an opinion that'd be great too. Thanks.

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    Make real real sure Johns00Z28's Avatar
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    Wow, no one? Guess I'll just have to do more research myself.

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    Drag racing is a disease! RacerBob's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    I've seen a lot of differing viewpoints on the various rear ends available to us. First, I'd like to know which one is the lightest between the 12 bolt, 9" and Dana 60? Secondly, I'd like to know which causes less parasitic loss as I've heard different responses on that as well. And if you could provide proof rather than just an opinion that'd be great too. Thanks.
    I don't know how much each one weighs, sorry. I do think that you need to consider the carrier that you go with also. On page 5 of the Trutrac Owner's Manual it states "For Trutrac models built with pre-load, ther rotation will be restricted(approx. 100 lb. ft. torque required to rotate). Pre-load units are all models for Toyota and Dana 30 axles, and for the Ford 9"-913A328 model only."

    I was quite suprised after my 9" install. I didn't expect that much drag. I hope this info helps. Good luck with your research.
    Drag racing...just another numbers game.

    Vortech Super Charger, 9" w/4.11, 3200 Stall, BMR SFC, BMR TracPak, !MAF screen, 160 T-Stat.

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    Make real real sure Johns00Z28's Avatar
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    Hey that's some good info. I wonder how many ft./lbs the other rears take in order to rotate?

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