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Shifting Trouble in 1989 K5 Blazer

Discussion in 'Chevy Trucks' started by Dondo, Dec 22, 2009.

  1. Dondo

    Dondo Senior Member
    Messages: 158

    This was the 1st plow with the new truck. I have plowed with 2 other K5's and never had this issue. On the new truck after about 6 hours of plowing I got the unforgettable "Clunk/Bang" each time I put it in reverse. If I come to a stop and put the truck in reverse with my foot on the brake I can feel the trans shift into R. I hit the gas to back up and after about 3-5 feet I get the Bang noise. It almost feels like the transfer case is slow to shift. I just put new rear U-joints on it and the trans mounts look fine. Has anyone ever had anything like this or have any insight?

    Thanks in advance for the help!!
    Don Donadio

    Donadio Snow Plowing
    Butler, NJ
  2. Detroitdan

    Detroitdan PlowSite.com Addict
    Messages: 1,937

    maybe look at the front driveshaft and front axle u-joints?