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With gear "break in".....

This is a discussion on With gear "break in"..... within the Drivetrain forums, part of the LSx Technical Help Section category; Hey everyone I am going to get my 3.73 gears installed at the end of February and have to drive ...

  1. #1
    Senior Member clg82's Avatar
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    With gear "break in".....

    Hey everyone I am going to get my 3.73 gears installed at the end of February and have to drive about 1 and a half to 2 hours away to get them installed. The guy that is installing them is very reputiable, but he is saying that I can drive straight home without stopping (for lunch maybe) and it won't harm the gears as long as i'm not flogging it......is this true will I be ok without stopping or will this be bad for the gears?~Chris

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    Senior Member bills98ta's Avatar
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    You'll be OK !!!

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    Senior Member bigrondownhiller's Avatar
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    Drive about 500 miles being easy on them and have them rechecked and have the gear oil changed.

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    Senior Member clg82's Avatar
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    Anyone else with any suggestions?

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    Senior Member Bottesini's Avatar
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    The way we broke in my 9" was to run it on stands getting up to idle in 4th gear. Then shut the car down with the clutch in and listen for any noise. Next we took it out for a short 5-10 mile drive, keeping it easy on the throttle. Looked for leaks and made sure the casing was not to hot (also on test drive listen for noise). Let the car sit for about an hour and then pounded on it.

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    Senior Member clg82's Avatar
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    anyone else with any suggestions or will i be ok to drive home?
    2000 Arctic White trans am, ws6 hood, ws6 air box, slp lid, slp smooth bellows, slp loudmouth exhaust,shift kit, rebuilt trans, LS6 intake, 3.73 gears, Shaner S3 p/p throttle body, and a tune . SFC. C6 ZO6 rims 18" in back 17" in front. Drilled and slotted rotors.

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    Member 1TA LS1's Avatar
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    You'll be fine driving home. The only problem would be holding yourself back from driving it hard to try the new gears. Just baby it for about 250-500 miles and you'll be fine. That's what I did when I got 3.73. One of the best mods do date. Where are you getting the work done?
    01 TA WS6: Volant CAI, custom ram-air baffle mod, custom borla, BMR-(SFC, LCA, LCA reloc, PH rod,TQ Arm), UMI swaybars, Eibach + Bilsteins, TTM Anth, SS brakelines, 160 deg therm, 3.73 gears, Yank 3400 stall, Yank Crsmbr, Hayden 24k, Trans Go shiftkit, ported TB + MAF...soon to be cam/heads

  8. #8
    Impounded
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    From what I have read you need to put some heat cycles on it before you beat on it, and when you stop let it cool all the way off.

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    drain/change the fluid,visual inspection of the drained fluid will tell a lot about what's going on in there.
    Is it just the gears that are being changed or are you changing posi/differential too?

  10. #10
    Senior Member clg82's Avatar
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    Quote Originally Posted by oldmanZ28 View Post
    drain/change the fluid,visual inspection of the drained fluid will tell a lot about what's going on in there.
    Is it just the gears that are being changed or are you changing posi/differential too?
    nope not changing the differential....just the shims bearing etc etc etc.

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    Member stephen02ws6's Avatar
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    i would stop on the way home to let the gears cool down. that might help with keeping them from making noise.

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    visual examination of the drained fluid should then only show the gear break-in.Some gearsets are bronze phosfide coated to help break-in and there the fluid would show a 'bronzy' color,some are 'black/grey' coated with something to help break-in.Depending on the set you're using,initial drain should show some discolorization away from the normal transparent dark brown of the virgin fluid.
    Only thing bad would be particles that are large enough to settle out quickly.

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    2 SS's are better than 1 Jays00ss's Avatar
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    for me I have always done a 3 step cool down. drive the car for 10-15 minutes, stop and let cool for at least an hour. do that 3 times. Then I take it easy for 500 miles varying my speed. Then I change my oil, then give her hell. Never had any "whining" issues when you properly break in your gears.
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

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    Senior Member bills98ta's Avatar
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    Uhmmm... I always broke mine in a 1/4 mile at a time !!! LOL !!!

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    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by bills98ta View Post
    Uhmmm... I always broke mine in a 1/4 mile at a time !!! LOL !!!
    well all my true "race" cars were done that way but who cares about a sloppy noisy rear end in a true race car anyway.

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