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np203 transfer case

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 77k5, Oct 18, 2000.

  1. 77k5

    77k5 Registered Member

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    I was reading on of the posts and it said something about using 10w30 motor oil instead of gear oil, I have gear oil in mine, that is what was in it. I could find anything about it, could some point me in the right direction and I'll need to drain my case but I didn't see a plug where it would drain.
     
  2. James

    James 1/2 ton status

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    Actually you should use 10w-40. See http:/www.off-road.com/chevy/mm-np203/. This info was provided to me by Boss and Wheels from COK5
    Peace
    James
     
  3. James

    James 1/2 ton status

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    Sorry. Forgot to say. Provided it is full time 4wheel drive.
     
  4. Blazer79

    Blazer79 1/2 ton status

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    To drain it, you will find some bolts in a circular pattern in the rear of the case. You need to remove one or two of the bottom ones.

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  5. EDdaTREE

    EDdaTREE 1/2 ton status

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    I thought it was 10w30 for an np 203 that is still full-time.
     
  6. 77k5

    77k5 Registered Member

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    The case has a part time kit in it, does that make a difference?
     
  7. Wheels

    Wheels 1/2 ton status

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    No, the oil slinger is still the same and with gear oil, some parts won't get lubed properly
     

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