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609dry

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About 609dry

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  1. I have the same problem... harsh 3-2-1 down shifts .... problem seems most prevalent on warm days 85º + with trans temp 178º - 180º...... Started around 1700 miles went away because outside temps cooled off but then returned at 2900 miles on a 91º day
  2. I have the same problem... harsh 3-2-1 down shifts .... problem seems most prevalent on warm days 85º + with trans temp 178º - 180º...... Started around 1700 miles went away because outside temps cooled off but then returned at 2900 miles on a 91º day
  3. 2013 GMC Sierra SLT 20" factory wheels. Bought certified used with 24K miles on it. Never felt right or safe at highway speeds. Noticed something right away on the freeway driving home..... as I traded in a 2009 GMC for this vehicle. I attributed this to the 20" wheels that my old truck didn't have...... felt loose and a little uncontrollable at high speeds and harsh at lower speeds. As I see others do I also do not like Goodyear Eagles that were factory so changed them out for Michelin LTX M/S . Immediate improvement but still not as nice as my old truck. Again I thought well 20" wheels are the difference. So then 20K miles later I noticed unwanted feel during braking on a kind of bumpy/ wavy black top surface. So I looked as the shocks. Even though they should still be fine (OEM shocks should last at least 100K miles... I work for a Major OEM supplier). Low and be hold all 4 shocks (mono tube) have a dead area from full extension down 2-3" then they get super stiff. Brought them into work had them performance tested and evaluated and sure enough it showed a huge lag in the performance curves. There were no leaks or any other tell tales to alert me to this problem. In fact there were torn down and used as a competitive analysis and no broken internals were found. The degradation of ride was due to loss of gas pressure and the inferior valving system that this company uses. My company does not produce a mono tube shock for this truck so I chose the next best thing Bilstein . So if you want your truck to ride better start with Michelin and Bilstein . Now it rides and drive as it should. No 20" wheel excuse. Not happy with the cheap parts used by GM on these expensive trucks.
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