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  1. #1

    Default Rear diff? Stop it!!!

    Ever since I had the rear diff drained, cleaned up and had a new gasket put on, the cover bolts keep backing out. I'll discover a drip/leak down there every month or so. It was tight as a drum before. What do I need to do, so these bolts stay put?
    I like you.

  2. #2

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    Loctite but I dont remember wich color for that application.




    2011 Silverado CrewCab 5.3L*Ram Air Look Cowl Induction Reflexxion Hood*6" Pro Comp Lift*Flowmaster Dual exhaust*Perfect Launch Rear Diff. Cover*Led Smoke Taillights*L.E.D.Smoke 3rd Brakelight*60" L.E.D. Tailgate Bar*Rearview Mirror Reverse Camera and Sensors*Smoke Headlight Covers*Front Bumper Grill Insert*Deezee Black Alum. Diamond Rail covers*20" Ultra Motorsports Rims wrapped with 35.5"B.F. Goodrich Tires*Inchannel Raingaurds*CAI*Bullydog GT Tuner*Alpine Amp*Boss 6x9's*Boston Acoustic Subs*Terrantula Tweeters*Custom Sub box*Red Led Interior Accents*5% Ultimacool duo tint rear window and doors, 20% front doors*Custom Vinyl Graphics*Demolded*Debadged*Painted drums and calipers*
    Future Mods Include: Custom Interior Hydrographics, Electronic Rollup Toneau Cover, 4.56 Gears, Painted rear bumper

  3. #3

    Default

    Blue loctite is appropriate for most vehicular applications. I would NOT use red loctite, as heat -must- be applied to remove it and the melting temp of the substance is 200F if what I've read regarding it is accurate.

    Surreal

  4. #4
    Sr. Engineer Dana W's Avatar
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    Default

    Quote Originally Posted by janikphoto View Post
    Ever since I had the rear diff drained, cleaned up and had a new gasket put on, the cover bolts keep backing out. I'll discover a drip/leak down there every month or so. It was tight as a drum before. What do I need to do, so these bolts stay put?
    You don't mention the year, but some diffs require a paste/liquid/caulk/glue type of gasket sealant around the cover.

  5. #5

    Default

    Quote Originally Posted by Dana W View Post
    You don't mention the year, but some diffs require a paste/liquid/caulk/glue type of gasket sealant around the cover.
    I keep forgetting this forum doesn't show our vehicles in our profile like many other car forums do. I have a 1999 K1500 suburban.
    I like you.

  6. #6

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    Like @SurrealOne said, Blue loctite. But, you have to make sure that you clean every hole out with brake parts cleaner and dry them with compressed air. You must also clean the bolts. If there is oil or dirt on the bolts or in the holes the loctite will be pointless.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  7. #7
    Sr. Engineer Dana W's Avatar
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    Quote Originally Posted by janikphoto View Post
    I keep forgetting this forum doesn't show our vehicles in our profile like many other car forums do. I have a 1999 K1500 suburban.
    Hey, that's what I have, a 99 Burb K1500. It sounds like the blue locktite is your cure though. Can't live without the stuff. Pikey is right. I left some studs and holes oily and dirty once and used locktite in 'em. The stuff might as well had been designed as a bolt ejector.

  8. #8

    Default

    Quote Originally Posted by janikphoto View Post
    Ever since I had the rear diff drained, cleaned up and had a new gasket put on, the cover bolts keep backing out. I'll discover a drip/leak down there every month or so. It was tight as a drum before. What do I need to do, so these bolts stay put?
    I used Hylomar non-hardening gasket maker on mine, and it is still dry.
    2011 Chevy Silverado LT 4WD 25k miles
    2001 Suburban 2WD, 5.3, V8 176k miles
    1993 964
    1996 318TI

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