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Thread: driveshaft breaking?

  1. #1
    Join Date
    Jan 2004
    Posts
    117
    is it a good idea to replace the stock driveshaft when doing an ls1 swap? Ive got an 89 chevy c1500

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    The most important thing is that you get the larger driveshaft yoke. There are two. The camaro/firebird use the smaller ones. The trucks use a much larger ujoint. Re-use the stock shaft for strength. Just my opinion. Aluminum it too weak for the torque load of a heavy truck. Draw yourself a straight line down your steel shaft and after a few months of driving/trips to the track you will see how much even the steel tube will twist. Sure you could buy kevlar but for the price you could gain more horsepower buying add-ons than you could save by the lighter weight. The smaller diameter driveshaft the better, less rotating mass.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Mar 2003
    Location
    Florida
    Posts
    1,208
    mine doesnt vibrate even with 4.10s jimmy...i thought/feared it would. i havent done a 6k rpm dump at the tree yet either though.

    bigger diameter = less vibe/stronger and yes aluminum will work. allens is 3.5" HD aluminum i believe.
    Hugger Orange 99 SS Hardtop #756
    485rwhp/440rwtq SAE

    http://i83.photobucket.com/albums/j301/slmdls1/Signatures/hugger-prostar-sig.jpg

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