What Tranny and Oil Pan Gaskets Should I buy?

Discussion in 'Transmission & Driveline Topics' started by slayer021175666, Apr 19, 2018.

  1. slayer021175666

    slayer021175666 Veteran Member

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    I have a leak at the timing cover/oil pan area on my 327. I also have a tranny pan leak.
    I have tried cork and black rubber seals on the tranny, to no avail. They always leak. I was thinking about this Moroso one :https://www.ebay.com/p/Moroso-Perm-Align-Rubber-Transmission-Pan-Gasket-TH350-93102/658631372 but Summit (and ONLY Summit!) say its only for aluminum pans. I don't see why it would matter but, I thought I'd ask you guys. Can't I use it on my steel pan?
    As for the oil pan leak, I was thinking about one of the Felpro 1 piece gaskets but, I see they have ones made for thin or thick oil pan to timing cover gaskets. I thought they were all the same and since my timing cover is a chrome aftermarket one, I have no idea which it is.
    I was also thinking of swapping it for a 2 piece timing cover but none of the covers I see, say whether they need a thick or thin oil pan to cover gasket.
    Never thought a couple gaskets and a timing cover swap could get so confusing!:confused:
    Any help with some or all of this would be appreciated. Anyone have experience with ANY of this?
    Thanks Guys!
     
  2. tom3

    tom3 Veteran Member

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    On that trans. pan, sometimes a front pump can leak and really look exactly like the pan is leaking in the front. More you tighten the bolts or change gaskets, seems to make it leak just a bit more. Big o-ring seal around that pump that can get hard and lose seal. This was on my 700R4, same setup with yours? Something to consider.
     
  3. slayer021175666

    slayer021175666 Veteran Member

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    Mine is a TH350 but, they can be deceiving like that too. I've checked that with my finger, though. It's clean.
     
  4. slayer021175666

    slayer021175666 Veteran Member

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  5. COPO

    COPO Veteran Member Lifetime Gold Member

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    I used GM gaskets in my 87 Grand Nat'l trans with no leaks.
    On my 70 Z28 I've used https://www.summitracing.com/int/parts/fel-tcs51241 Fel-Pro Timing Cover Gaskets TCS51241
    when I did a cam swap and didn't need to change the pan gasket.
    When I went with a roller cam I used the std Fel-Pro 2 piece oil pan gasket with the front and rear rubber ends.
     
  6. slayer021175666

    slayer021175666 Veteran Member

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    I think I got it figured out on the oil pan so I ordered this. https://shop.advanceautoparts.com/p/felpro-oil-pan-gasket-set-os-34509-t/18180032-P Got it for %30 discount so, it only cost me around $25 and its ready to be picked up at my local Advanced Auto store. No waiting!;)
    Now. How about the Moroso trans pan gasket? I don't see why it would have to be only used on an aluminum pan and Summit is the only place that says so. All other sellers make no mention that it has to be on an aluminum pan.
     
  7. Lee45

    Lee45 Member

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    I have that pan gasket on stamped steel pan and it works well for me, I've had the pan off a few times too and it's been leak free every time. Moroso makes valve cover gaskets in the same material and they work fantastic too.
     
  8. slayer021175666

    slayer021175666 Veteran Member

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