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3 speed transfer case?'s

Discussion in '40- & 55-Series Tech' started by ozarkcruiser, Jul 13, 2005.

  1. ozarkcruiser

    ozarkcruiser

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    Ok, I am putting a 4.3 vortec in my 72 cruiser. I am going to run a 4 spd toyota transmission and my 72 3 spd transfer case. Based on some research I believe I am going to need a transition gear to mate the transmission output shaft to the gearing of the transfer case. I stumbled across this gear from a 74 transfer case from a local guy that he says will bolt the 4 spd tranny to the 3 spd transfer case. Is this correct? What does the FSM call this gear so I can start tearing into the transfer case? Thanks.
    Jake


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  2. 76FJ40

    76FJ40 Old Fart SILVER Star

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    There's what's known as the "transition" T case from '74 that uses the gear you're talking about. You can check the SOR catalog to see the specific date range that this gear applies to. as I recall, it's something like 32 teeth and 16 spline.
     
  3. peesalot

    peesalot

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    you want 16 spline on the inside .
    It is a special gear cause it has 16 inside and mates to the older 3 spd tcase gearing whereas the 4 spd tcase's had different gearing so you use the special gear that lets the 4 spd tranny go infront of the 3 spd tcase.
     
  4. ozarkcruiser

    ozarkcruiser

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    It is the 16 spline. When you say go in front of 3spd tcase you mean IN the actual case correct?
     
  5. CruisinGA

    CruisinGA

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    Yes he does.

    Some '74's got the four speed tranny with a 3 spd tcase. Hence the adapter gear. Count the inner splines to be sure. Some '74's got 3 spd trannies with a standard 3 spd case.
     
    Last edited: Jul 13, 2005