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Trasfer case help ?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JDELBLAZ, Jul 11, 2000.

  1. JDELBLAZ

    JDELBLAZ 1/2 ton status

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    i have a 89 blazer with manual hubs a 700 r4 trani do i have a 208 or 241 tcase i want to chage the oil in it i called 2 dealers and one told ne use atf oil and the other said gear oil looked in my manual it said conventional tcase use gear oil automatic hub tcase use atf!
    now here is the confusing part i have manual hubs but when i drain the oil it looks and smells like burned atf what should i put in this tcase
     
  2. chevy4x4

    chevy4x4 1/2 ton status

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  3. Blazer1970

    Blazer1970 1/2 ton status

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    Your '89 has an NP241 case. For either chain drive case, NP208 or NP241, use ATF. Do not put gear oil in there.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  4. Boss

    Boss 1/2 ton status Author

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    They're right, put ATF in there. Dexron III
    Boss
     
  5. 1TUFF89

    1TUFF89 1/2 ton status

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    Definitely ATF. I know first hand because I have already rebuilt my t-case thinking it was the culprit of my leak. What the real problem was (for everyone's info. and for future reference) was the green seal at the back of the t-case where the yoke slides in had worn a groove around the yoke allowing the fluid to seep out and of course spray all over the undercarriage of my truck while driving down the road. I replaced the seal and the yoke and all is well.

    Chevy's RULE!
     

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