Rear main seals?

Discussion in '6.9L IH & 7.3L IDI Diesels' started by ah1988ford, May 16, 2018.

  1. ah1988ford

    ah1988ford Full Access Member

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    I just bought a felpro rear oil seal and it is different from stock I just wanted to know which seal is better they are 2 different kinds the old one has a spring in it to keep tension and its made out of rubber and the new one is just like a plastic flexible ring it kinda scares me to use it seems like it would wear out premature
     
  2. DaveBen

    DaveBen Supporting Member Supporting Member

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    I would use the rubber and spring one. :Thumbs Up
     
  3. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    The plastic ring is for the install only. After that, you pull it out and throw it away. Either type will work just fine, even it it's different than stock.
     
  4. icanfixall

    icanfixall Official GMM hand model

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    It sounds to me like you purchased the new style seal.It has a steel wear ring and the actual seal has two lips. Please read the install directions when installing it.
     
  5. towcat

    towcat Administrator Staff Member

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    if you installed or are going to install the fel-pro speedi-sleeve on the crank, you can only use the rubber seal with spring ONLY.
    the new design seal does not have enough "give" to accomodate the installed speedi-sleeve.
     
  6. chris142

    chris142 Full Access Member

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    The one i put in my truck was a different material that required to be installed dry.
     
  7. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    That's the newer style.
     

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