Rear End Gear Noise
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Thread: Rear End Gear Noise

  1. #1
    Senior Member nasty68's Avatar
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    Rear End Gear Noise

    What causes the rear gears to howl going down the road? Does the backlash setting have something to do with it?

    68 Dodge Dart, 383, 727, 8 3/4 w/ 4.10's

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  3. #2
    Full Member brandon6973's Avatar
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    lash has everything to do with it, you need to check the lash and shim your pinion gear to fix it.
    I just want the front wheels to come up off the ground when I take off, is that too much to ask?

  4. #3
    Full Member Supershafts's Avatar
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    Lash and pinion depth, the entire set up needs to be right everything works together.
    ]=Supershafts.com=[

    www.limotorsports.org
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  5. #4
    Senior Member nasty68's Avatar
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    Well i guess this will be an excuse to buy some tools to set up a rear. Thanks guys.

    68 Dodge Dart, 383, 727, 8 3/4 w/ 4.10's

  6. #5
    Full Member Supershafts's Avatar
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    You're gonna need more than just tools
    The problem you have was caused by someone that had tools. . . . and thought that was all they needed.

    Find someone that knows what they're doing, it'll be cheaper to let someone who does it professionally do it
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  7. #6
    Senior Member d55dave's Avatar
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    There is a very good chance that if the gearset is noisy now it is worn, from use or improper set up, and no matter what you do the gearset will now always make some noise......
    I'd rather die while I'm living than live while I'm dead

  8. #7
    Senior Member nasty68's Avatar
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    Sounds like a set of new gears are in order.

    68 Dodge Dart, 383, 727, 8 3/4 w/ 4.10's

  9. #8
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    Quote Originally Posted by nasty68 View Post
    Sounds like a set of new gears are in order.
    What kind of pumpkin do you have? 489, 741, 742?

    I just put new gears in my 742 a few weeks ago with the help of a knowledgeable guy with all the tools. The difficult part/tool would be removing the pinion bearing to add new shims if needed. We started with the .090 shim, put the bearing on, put everything together and painted the gears. Damn nice pattern right off the bat, so luckily we didn't have to press the pinion bearing off to do any more shimming. Gears work great, no noise.

    Other than that, and a press to put the bearing on (or carrier bearings if needed), a dial indicator on a mag base, maybe a few other things, it wasn't that hard.

    Still as someone else said, if you or someone you know doesn't have the experience, best to take it somewhere and pay them 2-300 to do it and set up the gears properly. For a shop that does that sort of thing it would be very easy to get it right.

  10. #9
    Senior Member nasty68's Avatar
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    Its a 489 case with a 35 spline Mark Williams spool and 4.10's. Pretty sure i could do the rear if i had the tools to set it up. Pinion depth and backlash and that seems about it. I have access to a press. I have done just about everything else on this car.

    68 Dodge Dart, 383, 727, 8 3/4 w/ 4.10's

  11. #10
    Full Member Supershafts's Avatar
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    The tools will cost more than what the shop that does rears to set it up would charge.
    ]=Supershafts.com=[

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