Changing out the Transfer Case Fluid

Discussion in 'Transfer Cases' started by BLACKed OuT 97-GT, Jul 28, 2011.

  1. BLACKed OuT 97-GT

    BLACKed OuT 97-GT Newbie

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    i have a 97 Yukon 2dr with the electronic push button 4x4. First does anybody know which transfer case model it was for that year/model?

    The main question i had was how would i go about changing the transfer case fluid and what would i use and how to do it? Never done it before.
     
  2. MIHELA

    MIHELA Nooo! Noooooo

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    Auto Trak II from the dealer for the push button case. It's the 243C transfer case. It has the same drain and fill plugs on the back side of the case as a 241C. Just take off the bottom one and loosen the top and when it's empty put the bottom plug back in and fill it to the level of top plug.
     
  3. 93 K1500

    93 K1500 I'm Awesome

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    X2+++ Also a pump oil can or a tube that screws onto the bottle makes filling it back up easy
     
  4. Butch

    Butch I'm awesomeR! Staff Member

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    '97 wouldn't have auto trak IIRC just a standard NP243
     
  5. Fobroader

    Fobroader I'm Awesome

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    I bought a syringe type of transfer pump, it works great, the hoses are long enough so you dont have to be under the truck. Great for diffs, trannies and t-cases. Under 20 bucks at the local Parts Source.
     
  6. bggrnchvy

    bggrnchvy Super Moderator Staff Member

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    Negative on the fluid. Only the 246 needs that expensive blue dealer only stuff.

    The 243 can just be filled with 4qts of ATF DXIII+
     
  7. MIHELA

    MIHELA Nooo! Noooooo

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    Cool, I thought all the clutch pack equipped t cases took the auto trak. That should save you some money.
     
  8. bggrnchvy

    bggrnchvy Super Moderator Staff Member

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    243 has no clutches, hence no A-trak II. It's just an E-shift 241.
     
  9. MIHELA

    MIHELA Nooo! Noooooo

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    Actually it does have a high/low clutch pack. But it looks like a really simple mechanism to soften the shock of the high low shift.
     
  10. bggrnchvy

    bggrnchvy Super Moderator Staff Member

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    Reference?

    There's zero friction clutch parts in a 243 I've ever seen.
     

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