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Tcase Issues 02 2500hd

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by COdix699, Oct 1, 2013.

  1. COdix699

    COdix699 New Member

    Yea, its a flowmaster 2 in 2 out. came with the truck. lol.

    - - - Updated - - -

    the P.O. mentioned that his mechanic thought it was the chain. i got to researching and discovered the old pump rub issue. sounded like two logical explanations to me, but i don't know this guy, much less his mechanic( God bless Craigslist) Im going to have to pull the case to fix whatever's wrong so i may as well fix it all at once.
  2. Pikey

    Pikey Moderator Staff Member 2 Years ROTM Winner 1000 Posts

    Do you know where to look for the pump rub hole? just google GM pump rub hole and look at the images, it is like the third one over It will not leak fluid unless you are driving because the hole that forms is above the fluid level.

    As far as looking for a used or rebuilt t case goes. I ended up buying a new one from GM for $1200. rebuilds were $1100.
  3. COdix699

    COdix699 New Member

    i do not know where to look. i thought i did, but i didn't see anything either. the area around the drain plugs and back of the case are dirty, but looks like road grime rather than fluid.
  4. dsfloyd

    dsfloyd Epic Member 5+ Years ROTM Winner Gold Member 1000 Posts


    I had the pump rub issue on my truck. Not really anything in the way of noise but it sure did start leaking like a pig. First I thought it was the output shaft seal but later found the hole as its usually small. had to use a dye to find it. Mine was on the top side near an inspection cover. The chain definately makes sense. you can usually find rear case halves (for pump rub issues) on ebay and some are making them in things other than aluminum and they also make a new ring to add on the inside to fix the rubbing. I know on mine to split the halves the entire TC had to be removed as there was a C clip inside only accessible from the inspection hole on top and not enough room to get to it with it in the truck. That being said we have different TC so as far as splitting case halves may be entirely different.
  5. COdix699

    COdix699 New Member

    im still not 100% sure what t case i have. the tag has gone missing and i cant make heads or tails out of my rpo codes in my glove box.
  6. dsfloyd

    dsfloyd Epic Member 5+ Years ROTM Winner Gold Member 1000 Posts

    if you give your vin # to the dealer parts guy they can tell you (well they should be able to).
  7. COdix699

    COdix699 New Member

    t case.jpg im hoping what looks like a patch job was a pump rub repair at one point.
  8. Pikey

    Pikey Moderator Staff Member 2 Years ROTM Winner 1000 Posts

    Do you mean that you can not read them? chances are it is a NP2 rpo code or a NV261
  9. COdix699

    COdix699 New Member

    I don't know what I'm looking for. I guess I'm looking for an NP something.

    - - - Updated - - -

    Success!! NP2 RPI code
  10. Pikey

    Pikey Moderator Staff Member 2 Years ROTM Winner 1000 Posts

    Just a heads up, I think that the tail shaft on the NP2 is longer on the HD truck vs the non HD truck.

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