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run the numbers to see what i found...

Discussion in 'The Garage' started by jones, Dec 12, 2004.

  1. jones

    jones 1/2 ton status

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    actually,i'm pretty sure of what it is.i'd just like to have my suspicions confirmed.(numbers:GM 591665) I was wandering around my father-in-law's yard the other day and found an old top loader 4-speed w/ one PTO cover.no t-case attached though.by comparing it to Peterson's stick-shift tranny tech article,i'd have to say it's a SM420.if so,it probably would need to be rebuilt after being burried in the weeds for so many years.where would i find a rebuild kit?and maybe a divioced t-case?
     
  2. GMCLegacy

    GMCLegacy 1/2 ton status

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    a 420 had 1 pto cover on the drivers side, a 435 has 1 pto cover on the passenger side.
     
  3. jones

    jones 1/2 ton status

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    so where do i get a rebuild kit?do you think it would be good as is?
     
  4. GMCLegacy

    GMCLegacy 1/2 ton status

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    not sure about a rebuild kit, those transmissions havent been built in a "few" years. i have seen 465 rebuild kits on ebay, but not for a 420.

    id pull the top cover and inspect the condition.

    does the transmission spin freely?
     
  5. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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  6. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i can hook you up with the tranny rebuild kits, ill have to look up the price though.
     

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