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Differential - Is this normal?

This is a discussion on Differential - Is this normal? within the General Help forums, part of the LSx Technical Help Section category; I was getting ready to start the installation of the racetronix harness and noticed the exhaust was black right before ...

  1. #1
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    Differential - Is this normal?

    I was getting ready to start the installation of the racetronix harness and noticed the exhaust was black right before the differential. The chassis looks black. I took some pics. Is this normal, or do I have a differential leak? If that is the case, what are my options?

    Thanks for the help knowledgeable folks.







    Sent from my SAMSUNG-SM-N910A using Tapatalk

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    Senior Member raynor139's Avatar
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    Yeah 10 bolts are notorious for leaking around the pinion seal. People joke it's a standard gm option.

    Mine just leaked onto the rear end and the torque arm it was never enough to get all over the exhaust. I feel like that is more then normal.
    Last edited by raynor139; 05-14-2016 at 03:40 PM.
    Mods - Lid, Skip Shift Eliminator, MGW shifter, UMI SFCs, Founders Lower Control Arms, Founders Panhard Bar, Founders Adj. Torque Arm, UMI Torque arm mount, MWC Drive shaft safety loop, KONI Yellows, Strano Springs, Strano Sway bars, UMI Upper and lower A Arms, 160 thermostat, TSP headers and TSP true duals Monster stage 2 clutch, racetronix fuel pump, Strange S60 rear axle and tune by Frost.

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    Senior Member Too Fast's Avatar
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    Yes looks like a pinion seal leak. Check/monitor your fluid level, it may be nothing more than adding a few ounces a year, especially if you don't notice any dripping on the ground after you park for a few hours.

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    I have posted at least a dozen times... leaking pinion seal was a factory installed option on these cars.

  5. #5
    Spaz is My Mentor SMWS6TA's Avatar
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    If it makes you feel any better it's the same on Ford & Dodge vehicles too.

    My 8.8 has less then 2000 miles and the damn seal is leaking already.

    My Durango same thing...rebuilt it last yr.... pinon seal is leaking.

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    Thanks for the replies. It is not dripping on the ground. I will lookup how to check the level and keep an eye on it.

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    Spaz is My Mentor SMWS6TA's Avatar
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  8. #8
    Senior Member Whamhammer's Avatar
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    Quote Originally Posted by pajeff02 View Post
    I have posted at least a dozen times... leaking pinion seal was a factory installed option on these cars.
    Leaking 10 bolt pinion seals were NEVER a factory option....






    it was standard equipment!!!

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