clunk in my Suburban truck number two…

  • smoke grub
    Posts: 251
    June 7, 2013 at 12:22 pm #1282512

    I posted on the previous post.. that my Suburban also clunks.. but I think my clunk is different then the previous poster.. My suburban clunks when the tranny gets HOT.. never in cold weather and always on an upshift.. the upshift is timely.. meaning the truck shifts when it is supposed to.. but it only used to do this when it was like 90 out.. now its doing it when its like 70 out or less.. opinions.. thoughts.. ?

    sauger
    Hastings ,MN
    Posts: 2442
    June 7, 2013 at 1:36 pm #1176351

    What year truck? How many miles? Tranny cooler?? When was it last serviced? By Service i mean filter change and full fluid change. Half ton or 3/4?

    smoke grub
    Posts: 251
    June 7, 2013 at 1:46 pm #1148986

    yes I just had the filter and the tranny fluid changed.. and its ‘worst” now.. before some one recommended some additive that i put into the tranny.. but its a 97.. k-10 350 engine.. pretty much your stock Burbo..

    smoke grub
    Posts: 251
    June 7, 2013 at 1:47 pm #1148987

    and just 250,000 miles on the truck and tranny

    Mudshark
    LaCrosse WI
    Posts: 2973
    June 7, 2013 at 6:32 pm #1176387

    Quote:

    yes I just had the filter and the tranny fluid changed..

    This sometimes is the kiss of death for a high mileage tranny….I speak from experience…..
    What additive did you try??
    Lucas did the trick for me….

    milemark_714
    Posts: 1289
    June 7, 2013 at 7:12 pm #1176396

    Seems like your problem could be with the accumulator piston/spring assembly.A shift kit install would help that issue,providing the rest of the internals are good shape.

    Additives can work,plus a change to synthetic fluid?But like Mudshark said,a rebuild could be in order.

    belletaine
    Nevis, MN
    Posts: 5116
    June 7, 2013 at 8:00 pm #1176406

    I’m on my third suburban, and my mechanic( who I trust like family) says as long as the tranny fluid is full to just leave it alone. I know that doesn’t help but for future…

    joe_the_fisher
    Wisconsin Dells WI
    Posts: 908
    June 8, 2013 at 1:58 am #1176452

    Belletaine iv heard the same thing before.if its full justleave it alone. had a trailblazer that i had them flush and new fluid and filter within couple thousand miles tranny went out. boy was i pissed!!

    riverruns
    Inactive
    Posts: 2218
    June 8, 2013 at 2:11 am #1176457

    Quote:

    I posted on the previous post.. that my Suburban also clunks.. but I think my clunk is different then the previous poster.. My suburban clunks when the tranny gets HOT.. never in cold weather and always on an upshift.. the upshift is timely.. meaning the truck shifts when it is supposed to.. but it only used to do this when it was like 90 out.. now its doing it when its like 70 out or less.. opinions.. thoughts.. ?

    Yep. My 94 Taurus just started the same thing . Sucks. I have not done anything with the fluid or filter. When the temp gets to 70-80 outside it starts acting up .
    Shawn

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