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transmission problems

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by slackjawsk5, Apr 1, 2006.

  1. slackjawsk5

    slackjawsk5 Registered Member

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    spring is here and i,m about ready to start working on my 71 k/5
    the problem is sometime when i start the truck and put it in reverse
    i need to give it gas to make it engage. this is a th-400 trans./400 sb/np 203
    setup it also seems like it lacks the get up and go off the start but once its going it seems fine. i have a b&m quickshifter in it so i dont know if it needs a kickdown cable or not i dont have one hooked up ???

    so i started looking around at the tranny and noticed it was leaking and the guy who had it before me put some sort of sealer where the transmission and the transfer case bolt together (see photo) is it cracked perhaps, i,m not sure i was going to take something and scape the sealer off to see whats there


    please let me know what you think it could be or where to start
    thanks chris
    Attached Thumbnails[​IMG]
     
  2. 71 Blazer

    71 Blazer 1/2 ton status

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    Check your tranny fluid level, if it is low add fliud see if this fixes the slow engaging part. As for the gasket stuff, I would make sure that I had a catch pan ready when you remove that gasket stuff. I can't think of any reason to put it their unless it is cracked. Are you unsure if you have a kick down cable? It is also called a TV cable. Its a cable that goes from your tranny to your carb. If that is not hooked up that could fry your tranny, it doed more that down shift, it also ports more fluid during a down shift to prevent heat build up. Heat will kill an automatic.
     
  3. slackjawsk5

    slackjawsk5 Registered Member

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    yeah

    i image if it is leaking bad enough and i didnt notice the fluid is low
    i'm wondering if the guy just didnt seal it properly when installed and was to lazy to do it again so he slobered some gasket seal on it and that was that

    thanks for the response
     
  4. 71 Blazer

    71 Blazer 1/2 ton status

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    I hope so, just keep your fingers crossed.Hook up that kick down cable!
     
  5. jaros44

    jaros44 1/2 ton status

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    Kick Down Cable

    Thanks for the advice, the PO didn't have it hooked up. I didn't know it was that important. I just put a Locar throttle cable in it, I guess I'll spring for the kickdown cable as well. It really is a nice setup, braided stainless steel and a real nice bracket to go to my carb. I had an extra 2 feet of cable wrapped around my distr. on the original, sure got rid of that mess. Later J.
     
  6. 3 on the tree

    3 on the tree 1/2 ton status

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    confused? I thought that 400s had an elec soleniod for kickdown.:confused:
     
  7. jaros44

    jaros44 1/2 ton status

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    I have a TH350 trans, haven't seen any noid' yet. I still have to get under there and clean it up, the PO ran it with a leaking pan gasket. Later J.
     
  8. vtblazer

    vtblazer 1/2 ton status GMOTM Winner

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    A th-400's kick down comes from the connection @ the gas pedal via wires. ;)
     
  9. slackjawsk5

    slackjawsk5 Registered Member

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    i wasn't aware of that. do you know what it would look like or any pics of where it should be maybe mine is not working properly
     
  10. vtblazer

    vtblazer 1/2 ton status GMOTM Winner

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    Here's a couple pics of the switch.
    [​IMG]
    [​IMG]
     

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