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T-case issues

Discussion in 'GM Powertrain' started by rileyjr16, Jun 22, 2012.

  1. rileyjr16

    rileyjr16 Active Member 1000 Posts

    Ok today's that kind of day that anything that is wrong with anything, it seems to be my stuff. A while ago, I had my rear end on jackstands and installed a pair of 1/2 spacers for the rear wheels and decided to put it in drive to see if I have the parking brake issue still. Well a new issue came up, this time in the transfer case.

    Its a New Process Gear 246GM; 272 gear ratio and it makes kind of a slapping metal to metal noise. It does it mostly in drive and is barely heard in reverse. The u-joints are new and the boot is not torn that I can see.

    Are these transfer cases gear driven or chain driven?

    *Oh its push button and as far as I know, Service 4WD is not on in the DIC
    Last edited: Jun 22, 2012
  2. Pikey

    Pikey Moderator Staff Member 1000 Posts

    is it a constant noise or just occasional? My truck makes the same kinda noise at times. I think that it is the bushing for the slip yoke in the tail shaft of the transfercase. If i push up on it I can duplicate the noise
  3. rileyjr16

    rileyjr16 Active Member 1000 Posts

    Its a constant noise. Did listen to some youtube vids and the noise doesn't sound like the chain slap but who knows.
  4. rileyjr16

    rileyjr16 Active Member 1000 Posts

  5. aloxdaddy99

    aloxdaddy99 New Member 1000 Posts

    It is chain driven.
    [​IMG]
  6. rileyjr16

    rileyjr16 Active Member 1000 Posts

    Thanks Alox. I'm almost at my wits end with this truck but eveything in my body says keep her. Might just buy a used t-case for $350 and have a family memeber who is an expert in gears and whatnot do a partial rebuild of the used one. Alot of electrical and mechanical needs to be fixed.

    How much do you guys think a partial rebuild would cost?

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