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Is a NP203 divorced or married?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by zakk, Nov 6, 2001.

  1. zakk

    zakk 1/2 ton status

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    trying to figure out where the fluid is coming from & i don't know if the 203 is divorced. also, can you run dextron (sp?) in a 203 or just gear oil? i see a crack in the t-case, but it's tranny fluid coming out.[​IMG]
    as always, thanks to all who can help!

    -Zakk
    '77 K5 SB 400 TH350 NP203 p/t 6" Lift D60 14BFF 4.10's 36"Wrangler II's

    [​IMG] CK5's MOAB 2002 OR BUST!! [​IMG]
     
  2. POWERMAD

    POWERMAD 1/2 ton status

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    First if the t-case is mated to the tranny then it is married.
    A divorced t-case has a drive line from the tranny to t-case.
    2nd a 203 uses engine oil for lube. 10w40.
    If you have tranny fluid leaking from the t-case then the input shaft seal is wasted on the t-case.
    And if it is cracked then ya got problems all over.
    Are ya sure it is the t-case that is cracked and not the adapter?
    That is the piece inbetween the tranny and t-case.
    The 203 is cast iron and pretty tough.




    <font color=green> Too bad ignorance isn't painful </font color=green>
     
  3. zakk

    zakk 1/2 ton status

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    i see a crack on the "belly" of the t-case. it is "forward right" of the front driveshaft. it might be the adapter, but would that allow tranny fluid to flow like a river?

    -Zakk
    '77 K5 SB 400 TH350 NP203 p/t 6" Lift D60 14BFF 4.10's 36"Wrangler II's

    [​IMG] CK5's MOAB 2002 OR BUST!! [​IMG]
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    The ataptor has the seals from the tranny to the case. The adaptor will have ATF in it. If your case has oil in it then you have a leak around the adaptor. Ig the case was cracked and you had oil in it then you would get oil not ATF. Now be sure it's a crack your seeing and not casting marks. When they make the moulds for the housings there is often lines where tha halves meet. This will leave a line in the metal that can at a glance look like a crack.
    Worse case you might have a cracked addaptor and the 203 adaptors are pretty pletifull in junk yards so it sould be that expensive. Just a pain to replace.

    Women dig dents and flat paint!
    coloradok5.com/gallery/Grim
    75 Jimmy, Dollar
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  5. zakk

    zakk 1/2 ton status

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    so i might just be needing an adapter...great, right after i buy a 465/205 combo and a 350/203 combo[​IMG] oh well. if it is just the adapter i will be stocked. i will try to get a digital pic and post it to see what you all think. I was getting ready to just drop the t-case and tranny and see what the hell was busted.

    -Zakk
    '77 K5 SB 400 TH350 NP203 p/t 6" Lift D60 14BFF 4.10's 36"Wrangler II's

    [​IMG] CK5's MOAB 2002 OR BUST!! [​IMG]
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    If you need that adaptor Waxer has one for sale in the parts section. He's even on your side of the country [​IMG]. I have bought parts from him (infact parts off the 203 the adaptor came off) and he's a straight up guy. He won't screw you.

    Women dig dents and flat paint!
    coloradok5.com/gallery/Grim
    75 Jimmy, Dollar
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