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do u think my rear end will hold up?

This is a discussion on do u think my rear end will hold up? within the Drivetrain forums, part of the LSx Technical Help Section category; ok i have a stock 10 bolt (7 1/2) with motive pro gears 373's and with moser axles and a ...

  1. #1
    🤔 11s. blackbirdbrain89's Avatar
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    black trans am
    2000

    do u think my rear end will hold up?

    ok i have a stock 10 bolt (7 1/2) with motive pro gears 373's and with moser axles and a mac diff cover with the suport studs and arp main studs.. i did all this cus i broke my axle at the track and i had 350 bucks so it was chepper to just get new axles btw i only ran a 12.9 @110 with a 2.01 60 ft on street tires 255's. now over the winter im doing a head cam swap 4.8 heads ported and polshed and 2.055 valves, 1 7/8 headers and a big cam. im looking to put 450 to the wheels. note that a also have a center force dfx clutch and alum flywheel...

    i want to put 15x28 10.50 or 11.50 m/t streets probly drop it at 3500 rpm or so

    now my ? who thinks im going to leave the pinion at the start line?? i know i need to get a locker or something cus im going to break then center shaft/pin in the stock eaton. btw i allready broke one worm gear rear and the eaton probly wont be far behind... but if any of u guys read all of my info leave me some feed back so i know if im going to be cashing in some of my 401k for a 9 inch ..lol

  2. #2
    Member
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    Sunset Orange Metalic
    2002 Firehawk

    NO !!

  3. #3
    Member blk_jaws's Avatar
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    Black on Black
    2000 Trans Am M6

    Probably not.
    SLP LT's, SLP High Flow Cats, 3" Flowmaster CB, Comp Cam, SLP Lid, LS6 Intake, BBK 80mm TB, SFC, Ram Air HO Hood, Lowered, Torq Thrust II's

  4. #4
    2 SS's are better than 1 Jays00ss's Avatar
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    NBM / Silver
    00 SS / 71 SS Elcamino

    nope. I have seen stock m-6 car blow up the rear end
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

    1971 SS ElCamino 402 Big Block 550HP

    2006 Silverado 2500HD 496 cubic inches of pure muscle

  5. #5
    🤔 11s. blackbirdbrain89's Avatar
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    black trans am
    2000

    note that its a built 10 bolt

  6. #6
    The Bandit Wesman's Avatar
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    SGM
    1998 Trans Am WS6

    It all depends on how hard you hook. There are plenty of A4 guys running 11's on the stock 7.5", due to the fact that there isn't the initial driveline shock that you get when you launch with a manual trans. Thats what kills 7.5's, the shock of the launch, it just can't take the stress.

    So if you run street tires and ease off the clutch instead of dropping it, there's a good chance your rear will be fine. Especially if you can get some controlled wheelspin. But don't expect to run D/R's or slicks dropping the clutch at high RPM's and have the stock rear hold up without an issue, because thats exactly what will kill it.

  7. #7
    Senior Member bills98ta's Avatar
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    White
    1998 Trans Am

    Quote Originally Posted by blackbirdbrain89 View Post
    note that its a built 10 bolt
    Just bring it to the track tomorrow and don't hit it so hard at the launch !!!

  8. #8
    Sidewayz Hat Police LS1TransHed's Avatar
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    Navy Blue Metallic
    2000 Trans Am

    I hate our stock rear ends. My 10 bolt is giving out as we speak. Im replacing it as a quick fix with a 3.42 out of a 6 speed for cheap as hell, but later on... before my cam.. before my stall... this car is getting a 9" (well.. with 3.73s lol) so I dont break it nearly as easily in the long run.

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