Bumping sensation

[Dispointed]

Just had 2014 ltz trans complete rebuild.recently had a bump while at complete stop engine idling.Similar to being bumped at rear by another vehicle.After have experienced periodically.Transmission rechecked shows no codes ,only O2 sensor code . Any insight as 3 qualified mechanics can not I D 103 k mi

 

[mikez71]

@NickTransmissions ?

 

[NickTransmissions]

Just had 2014 ltz trans complete rebuild.recently had a bump while at complete stop engine idling.Similar to being bumped at rear by another vehicle.After have experienced periodically.Transmission rechecked shows no codes ,only O2 sensor code . Any insight as 3 qualified mechanics can not I D 103 k mi

Normal. My 6L80 in my 2009 Sierra does the same thing on occasion...It occurs when I tap the throttle then immediately let off and brake when coming to a stop. If it begins to happen more frequently or other symptoms begin to present, contact your builder or company that performed the rebuild work for recommended next steps, including potential warranty claim.

 

[Dispointed]

Thanks