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Found 1 result

  1. Long time reader and first time poster. I recently started to have vibration issues with my 2015 Yukon Denali. It started after the last scheduled oil change and tire rotation. I noticed the vehicle vibrating quite often. I started paying more attention to it and realized there was a shudder in-between gears that became worse as the transmission warmed up. Took it to the dealer I purchased it at and it was a bit of a fiasco because they were backlogged and ended up taking it to another dealer who performed 2810175 (updated TCM with latest calibration and relearn). They handed me the vehicle and said all fixed. Took the vehicle home and it seemed to be ok but started noticing the shudder again. One question is after this, is it expected that there should be a relearn time for X miles while its relearning the shift adapts/pressures? Is there an estimated number of miles for this? It seems to shudder less often but when it does it seems worse than before. I've only driven it about 60 miles since the recalibration. I'm fully aware of PIP5337 and asked them about this but they said the TCC was not bad. The vehicle was purchased June of 2015 so its definitely manufactured before November of 2015 which PIP5337D mentions. As I drive it more and more, I feel less of a transmission shudder but more road vibration than I felt in the loaner 2016 Yukon SLT or my wife's Kia Soul. I'm wondering if its possible they rebalanced improperly. The road vibration seems to be at lower speeds. At higher speeds it is better but may just be the quality of the roads I am driving on at lower speeds. I do notice the TAC jumps about 100 rpm during most shifts and not sure if this is normal. It seems to do this when the TCC speed should be 0 (around 2000PM) shifts. I realize it would not be fully locked under 1600RPM. At this point, I am not really sure if I am just paying too much attention to every bump on the road or if there is an actual issue. Are there any objective ways to determine if there is an actual issue and express that in a way that will not completely annoy the dealer? I have already had to pull this vehicle from one dealer because they were so backlogged it would have been in the lot sitting for repair for 23 days. With that said, they planned on doing a tear down on it to inspect and thought it was the TCC. Any help or guidance is much appreciated. Thanks!
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