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Identifying a tranny

Discussion in 'The Garage' started by oh-zj-io, Oct 22, 2006.

  1. oh-zj-io

    oh-zj-io Registered Member

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    Hey!

    I have an 88 K5 4X4 350 auto. The transmission is bad and I am ready to start looking for a replacement. I need some help identifying which tranny is in this Blazer.

    It's an auto but I do not see any markings or numbers on the case or on the pan. It is pretty surface 'corroded' and somewhat coated with a film of grease/oil and dirt. The Haynes doesn't say much about identifying trannys either.

    I know it's got to be the 350, the 400, or the 700R4 but which??

    It was going bad when I bought the Blazer so to the best of my knowledge it is a 3 speed with overdrive. (didn't shift correctly past 2nd gear) The indicator has 1, 2, and D with the OD O around the D.

    I have been told 700s weren't used in 88s and I've been told that 350s and 400s weren't overdrive. This is just my second Chevy truck so I really have no idea. The 84 K10 I have has the same indicator and does have overdrive, but, I was told it was probably a T350. ???????

    Gotta figure this out for the Blazer so I can find a replacement. Does the VIN indicate tranny?

    I know you guys can help me out here.

    Thanks,
    Al
     
  2. onetonbb74

    onetonbb74 1/2 ton status

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  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    700R-4, otherwise known as the 4L60 by '88.

    The last TH350 in a K5 was in '81 or so and the only K5's that ever got the TH400 were the military CUCV's (M1009)

    Rene
     
  4. oh-zj-io

    oh-zj-io Registered Member

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    Hey!

    I knew you'd come through!!!

    That was simple and painless and best of all quick!

    :bow: :bow: :bow: :bow: :bow:

    I really appreciate it.

    Thanks,
    Al
     

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