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Thread: Rear main seal

  1. #1
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    Rear main seal

    I need to change out the rear main seal on my car.
    i got the new seal already and my friend that knows a little more than me about car is gunna do it but i need to know if we will have to pull the crank to change it or not because he said he will need to pull the engine when i thought it could be done by just pulling the tranny

    any replies will be greatly appreciated

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    Full Throttle Extreme! BlackZ29's Avatar
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    Someone correct me if I'm wrong, but I think all you have to do is take out the transmission.
    -Jacob
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  4. #3
    Contributing Sponsor LETZRIDE's Avatar
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    Quote Originally Posted by BlackZ29 View Post
    Someone correct me if I'm wrong, but I think all you have to do is take out the transmission.

    Just have to slide the trans back yes
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  5. #4
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    alright thanks i wasnt sure because he was saying something about a lip being there that would prevent the seal to go in or out

  6. #5
    remove trans
    remove fly wheel
    theres your rear main

  7. #6
    i need to do this sooner or later.
    1997 Camaro - sitting in the garage indefinitely
    2013 WRX - the awd DD

  8. #7
    $.02 Queen OneSlowL36's Avatar
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    Same.. I think all 3.8 F bodies came with leaking rear mains from the factory. Sadly its not worth the time now, it barely leaks 1/4 quart between oil changes so I'm not concerned.
    ~Ryan~

    A4, Z28 Catback, 3" Magnaflow cat, 3" Cutout, PCMforLess tune, 3.42 Z/T
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  9. #8
    ya, mine only does about 1/2qt between changes, but it leaves quite a few spots on the drive way, and my oil pan/TC cover always has oil on it
    1997 Camaro - sitting in the garage indefinitely
    2013 WRX - the awd DD

  10. #9
    4000+ HP, it pulls. MusicMan's Avatar
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    They really aren't that bad to do, trans is easy to drop out.

    Make sure when you guys put the new one in that you put some oil on the surface facing the crank. It'll burn up if you don't, and you'll be right back where you started. I've seen it too many times to not make sure it's known.

    -Steve
    1996 Camaro, in progress: mild 5.3, TH400, T6 S475, 8.50 chassis cert...
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  11. #10
    $.02 Queen OneSlowL36's Avatar
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    ^ Good advice.
    ~Ryan~

    A4, Z28 Catback, 3" Magnaflow cat, 3" Cutout, PCMforLess tune, 3.42 Z/T
    As of now, its a 3350 lb paperweight.

  12. #11
    Light Throttle
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    Does that mean mine is rare if it doesn't leak at all? I have had to do two output shaft seals on the t5 though.

  13. #12
    Mud in the hvac box again FlyinGTP's Avatar
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    make sure you change the rear cover gasket while you have the trans out. 9 times out of 10 its the rear cover gasket leaking not the rear main. But the rear main inserts into the rear cover so it's kind of pointless to do one with out the other. the rear cover gasket is normally 6-10 dollars. make sure you have a paper one with the silicone bean impregnated in to it. I normally get them from the dealer because they are so cost effective.

    When installing the rear cover is slotted, so leave the rear cover bolts loose, lube up the rear main and then install the rear main. part way through rotate the crank some and continue tapping it in. once the rear main is seated then torque the rear cover down.
    Peeing in people's cheerios 24/7!
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  14. #13
    Contributing Sponsor LETZRIDE's Avatar
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    should any RTV be used?? doing this today/tommorrow
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  15. #14
    Cretaceous and aggravated lo_jack's Avatar
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    Are the flywheel bolts TTY or can they be reused?
    Scavenging your broken dreams.

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  16. #15
    Contributing Sponsor LETZRIDE's Avatar
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    Quote Originally Posted by lo_jack View Post
    Are the flywheel bolts TTY or can they be reused?

    x2 on this, or any bolts that have to be removed that are TTY for that matter...

    also, dumb question but, autos dont have flywheels? what are we taking off, flexplates?
    Last edited by LETZRIDE; 02-03-2010 at 04:51 PM.
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