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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: topside on November 02, 2008, 05:36:26 pm
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Noticed something new on the '79 K10 I recently purchased: when slowing down from about 50MPH or more, the right rear wheel & tire start hopping up & down. It can be modulated with the brakes (harder = more hop). Pretty weird. I'm thinking shock absorber as it seems to stop straight. Brakes were done last year & there are no visible fluid leaks, but the shocks are old. Leaf springs look OK. Having weight in the bed minimizes it somewhat. I bought the truck from a friend, have driven it before, & know the very good mechanic who did the brakes.
Whaddya think? Thanks in advance...
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thats werid. id try to get new shocks. and check your u bolts
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UPDATE - maybe...I checked the master cylinder and noticed that the front reservoir (the larger one) was down about 3/8" on fluid; I'll have to see if that's for the front or rear brakes. Bolts tight, leaf spring OK, shocks look ancient but were working fine a week ago and aren't leaking. I'm starting to think the R/R wheel cylinder has seeped fluid onto the brake shoes...
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Pull the drums and inspect. Take pix