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  1. #1

    Default Transfer Case front output shaft seal leaking after replacement

    My transfer case from Hades situation continues to by my Achilles heel.

    Any ideas what would cause a front output shaft seal on a transfer case (NP 246) to go bad after being replaced? I just had the seal replaced about 3-4 weeks ago and the seal that was in there was supposed to be new when I got t-case, but it started leaking after a little time. Could there be something wrong with the actual output shaft/spline?

    It's back at the shop now that replaced the seal a few weeks ago, so I'm waiting to hear what they have to say.

    Thanks,
    Sean
    Current Rides: |99 Chevy Suburban- the family truckster |93 Lincoln Town Car- 250K miles & still churning -now a fan of the Panther platform
    Former GM cars: |78 Suburban 454 |71 Buick Electra 225 (deuce & a quarter) |75 Monte Carlo- 400SB- heaviest doors GM every made |70 Impala coupe- my 1st car

  2. #2

    Default

    Well,it appears to have been leaking between the seal and the case. They used some silicone around the inside of the case as there were small pits and scratches and installed a new seal (this will be the third one).
    If this seal leaks I guess I'll start looking for another t-case. What a PITA this has been.

  3. #3

    Default

    Who manufactured the seal? I ask because I just had a rear seal replaced (with a NAPA part) .. and it leaked like mad despite being brand new. So, it was replaced -again- with an OEM part and there was no issue. Apparently this is common, as another forum user (dsfloyd) had run across the same thing.

    The OEM rear seal cost about 3x as much as the NAPA part ... but was visibly superior in quality.

    Perhaps your front seal issue is similar in nature? I'm merely speculating ... but if you've got a leaky front seal and it's not OEM, maybe give the spendy OEM part a look and if it's an obviously better seal ... perhaps spend the cash on it and put it in and see if it makes a difference?

  4. #4

    Default

    Quote Originally Posted by SurrealOne View Post
    Who manufactured the seal? I ask because I just had a rear seal replaced (with a NAPA part) .. and it leaked like mad despite being brand new. So, it was replaced -again- with an OEM part and there was no issue. Apparently this is common, as another forum user (dsfloyd) had run across the same thing.

    The OEM rear seal cost about 3x as much as the NAPA part ... but was visibly superior in quality.

    Perhaps your front seal issue is similar in nature? I'm merely speculating ... but if you've got a leaky front seal and it's not OEM, maybe give the spendy OEM part a look and if it's an obviously better seal ... perhaps spend the cash on it and put it in and see if it makes a difference?
    Not sure who manufactured the seal since the shop ordered it in. The shop did say that they occasionally get a bad seal, which based on your comment makes me think they don't use OEM.

    So far it's not leaking, but the last won't didn't leak until it had been in there for 3 or 4 weeks. We'll see.

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