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what trans do i have???

Discussion in 'The Garage' started by skidpan, Jan 6, 2006.

  1. skidpan

    skidpan 1/2 ton status

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    ok so i have spent today trying to find out what the hell transmission i have in my rig...what i know
    its a 1978,
    its ALL cast iron,
    its shifter is on top,
    its attached to a 205 ,
    4 speed granny,
    its is stamped...
    13
    GM
    486452
    on the side of it,
    and m20 on the top by the bell housing
    now i have looked at every pic i could find of the m20s sm*** and any other 4 speed trans i could find in our trucks.
    it looks very simmilar to this, but this is called the clark 5 speed, and mine doesnt have that thing attached to the back. can some one help me out???
    [​IMG]
     
  2. sled_dog

    sled_dog 1 ton status

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    SM465, SM465 and 420 where the transmissions use in our rigs, 420s in the older style ones. I think you messed up when you just typed the numbers on the trans. Should be 484652. At least I think thats what mine says. Here is a picture of one or two of the ones I have laying around. Mine were conected to NP208/241s so they have the bigger adapter.

    [​IMG]

    [​IMG]
     
  3. skidpan

    skidpan 1/2 ton status

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    ohh thank you !!! i dont know why i was having such a problem with it... thanks
     

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