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K5 TRANNY,HELP!!!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JORGE, Mar 10, 2001.

  1. JORGE

    JORGE 1/2 ton status

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    Location:
    VITORIA-GAZTEIZ(ALAVA)BASQUE COUNTRY,SPAIN
    HELLO!
    I,m writting from spain,i,m looking for a diesel Blazer for sale.Well, i,ve been cheking out a k5 today,the engine sounds good,the stering turns ok,the brakes are goods,but the tranny..i ,m not sure if the tranny is good,i think slip too much in the first and second gear.i don,t know if this is usual.I think it has 4 speeds(it has p,r,n,d whit a circle around,d,2,1)is correct?is it possible the tranny needs to repair?has this gearboxes tendency to this trouble?is the first time that i drive a blazer,how are the 6.2 diesel running?has it a high force to start to run?i need to know if the tranny is good before to buy it,please,if somebody can help me,let me know as soon as possible.my mail is coke160@latinmail.com
    Thanks for any answer.
     
  2. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    The D with a circle is the overdrive position. The trans is a TH700R4. It should not be slipping. There were problems with this trans in the early '80s. By the mid to late '80s most were corrected. Sorry can't help more, but I don't have much experience with either the diesels or that trans.

    Jim '80 GMC
    Freedom First!
    <A target="_blank" HREF=http://www.bigjbear.coloradok5.com>http://www.bigjbear.coloradok5.com</A>
     
  3. blazen91

    blazen91 1/2 ton status

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    Take it to a repair shop and have them drive it.

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Since it's a Diesel did you let the glow plugs get hot before cranking? There should be a light that says wit to start come on for about 15-20 seconds to preheat the fuel to get it to start. Diesels don't like cold and do get fussy in the cold. There are block heaters available that you can plug in at night to keep the engine warm to make starting easier in the morning.
    As for the tranny. Soft shifts are not uncommon but do wear the tranny faster. Without driving the truck it's hard for me to comment on what you feel is a possible problem. Sounds like this may be the first GM auto tranny you have encountered and really don't know what to expect. There are "shift kits" available that will make them shift much more firm. They are about $35 US so not very expensive and it may be all you need to make you happy.
    As one of the other posts mentioned, you may want to find a shop that is familure with GM auto tranny's and have them drive the truck to see if they feel there is a problem.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     

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