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Tranny swap.

Discussion in 'The Garage' started by Dirty, Nov 26, 2006.

  1. Dirty

    Dirty Registered Member

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    First of all this looks like a great forum with some great people. I looked for a search option but could not find one so I will ask my question here.

    I have a 84 K20 w/ a TH350 behind a 350ci. This tranny needs to be replaced. I have a 700R4 from my trashed K5. I was wondering if these could be swapped. I was specifically wondering what needs to be modified or adapted between the two vehicles. Any help would be great. Thanks in advance.

    Dirty
     
  2. NEK5

    NEK5 3/4 ton status Premium Member

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    I really cant answer your question, but where in MA are you?
     
  3. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    The 700r4 is longer... You'll have to swap or move your crossmember.. Thus, driveshafts will be different length too...

    What transfer case is on each?
     
  4. u2slow

    u2slow 1/2 ton status

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    You sure its a TH350? Doesn't seem right for the year unless swapped.
     
  5. Dirty

    Dirty Registered Member

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    Thanks for all of the replies!!

    BIGBLAZE433, I am from the Milford area.

    ryoken, the k5 has the 700R4 and the K20 has the TH350.

    u2slow, it looks like a TH350. I am not sure if it was swapped in or not. I got this truck from a local highway department at a cheap price, so who knows what they did to it.
     
  6. u2slow

    u2slow 1/2 ton status

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    In '82 the TH700, TH350, and TH400 were all offered in a 4x4 with an NP208. They all used the same length front driveshafts. I'd gather the rear must be the same also.
     

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