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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by shane, May 12, 2001.

  1. shane

    shane 1/2 ton status

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    Location:
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    1. How do I know if my torque converter is locking up? Any way to test it?

    2. What the hell is a TCC and how do I make sure its working properly?

    3. How often should you change the little filters on the injectors?

    4. Is me tranny electronic or vacum controled? It is a 91 blazer with a 4L60 (700-r4)

    5. Why would my brake light come on a weird times? Some times when I`m on the brakes and sometimes just cruising it will come on. Once on it will stay on until I restart the truck.

    Haynes manuals suck - big time! About as useful as two tits on a board if you ask me...

    Sorry for all the questions but this stuff is bugging me.

    Shane

    Just keepin it Canadian[​IMG]
     
  2. timebomb1602

    timebomb1602 1/2 ton status

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    . How do I know if my torque converter is locking up? Any way to test it? <font color=red> you can usually feel it lock + rpms drop</font color=red>

    2. What the hell is a TCC and how do I make sure its working properly?<font color=red>Torque Converter Clutch</font color=red>

    3. How often should you change the little filters on the injectors? <font color=red>little filters?</font color=red>

    4. Is me tranny electronic or vacum controled? It is a 91 blazer with a 4L60 (700-r4)<font color=red>vacum & TV cable

    5. Why would my brake light come on a weird times? Some times when I`m on the brakes and sometimes just cruising it will come on. Once on it will stay on until I restart the truck.............<font color=red>could be the abs system</font color=red> <font color=blue>on the manuals I have a chiltons and it seems ok part#(8055)28624......thats the # at the top of the book</font color=blue>.

    <font color=red>1991 GMC Jimmy 350tbi 3.42</font color=red>[​IMG]
     
  3. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Torque coverter lockup:
    If you have a tach, you will se an RPM drop ~200RPM.
    You should be able to hear/feel it also
    Check out your local shop with a portable diagnostic computer-plug it in and take him for a ride. The computer will show RPMs and more. (did that method when I blew the sprag, TC was cycling up and down)
     
  4. backlash

    backlash 1/2 ton status

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    Shane there's a search feature here. Can learn tons from going through things like 700r4 lock up problems, TCC, Torque Converter Clutch.

    Once you get a good thread click flat and have at it. I do believe it is both vacuum and electrically controlled.

    Good Luck

    Why do you ask? What are your symptoms?
     
  5. shane

    shane 1/2 ton status

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    I was going through my haynes amnual and it showed a picture of a little filter that is on the end of the injector where is sits down in the TBI body. I can scan the pic if anyone thinks I`m crazer than normal [​IMG]

    I`ll get on a search right snappy...

    Just keepin it Canadian[​IMG]
     

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