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<p>[QUOTE=&quot;Wickedchicken, post: 11624454, member: 309352&quot;]Hello guys,</p><p><br /></p><p>I got a 2020 cascadia dd15.&nbsp; I have a vibration or a shudder throughout the entire truck in what seems to be</p><p>a transmission or related components issue.</p><p><br /></p><p>Repairs done: Tri-axle wheel alignment, New tires all around. motor/tranny mounts replaced. U-joints replaced. Drive shaft balanced. both front end king-pins replaced. Front leaf springs replaced. These repairs have failed to solve the problem.</p><p><br /></p><p>The problem: Only when accelerating between 25-45mph does the shudder occur and this shudder is intermittent.&nbsp; I&#039;m trying to find out what is causing it so I observe.</p><p><br /></p><p>Observation: I observe that when i&#039;m local and in short traffic stop and go, the vibration starts to occur between these speeds. It&#039;s almost like the truck doesn&#039;t have enough airflow to breathe. (i notice the soot bar elevated on the dash readouts). However when i&#039;m on the highway for 2 hours or more the truck seems to do regen and the shudder goes away right after the regen.</p><p><br /></p><p><br /></p><p>Any thoughts or ideas on what this problem might be related to?[/QUOTE]</p><p><br /></p>

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