I have a 2016 Tahoe LTZ that I bought brand new with about 63,000 miles. Started having issues with a whirring sound upon acceleration a couple weeks ago. Took it to the dealership was told it could be the transmission pump but they wouldn’t be able to tell till they got into it and could tear it down but, they couldn’t do it that day because it was right before Christmas. I asked if it was ok to drive in the meantime and they said yes nothing catastrophic would happen! Well not even a week later and only 130 miles driven since, the transmission goes out! Won’t shift past 1st acts like it’s in neutral. But if I turn it off and then back on again I can get it going again until I come to a stop! Weird!!! I have to have it towed to the dealer to see exactly what the problem is but has anyone had this issue? I called the dealer to let them know and was told if it’s the transmission that needs to be replaced it could be 6-9,000 grand if it’s the pump could be 3-5,000 grand! Not the way I wanted to start the new year! Any insight is greatly appreciated!
*it’s the 8 speed! *edit* it is in fact the 6 speed! Just checked it manually
I do automatic transmission overhaul in Germany and i can tell you, that your dealer is not, what i would call professional.
If an automatic transmission makes a whirring noise, you better stop the engine and open the unit. No one, not the best mechanic, can tell what exactly in the unit is the problem and therefor can tell you, with a clear conscience that you can drive with that problem, without even damaging more.
And its for 99% not the pump. I think probably one gear has a broken retainer, or a bearing failed.
If you have no guaranty at the car, go to a transmission overhaul company, which are specialized, not to a dealer who send you on the road with a problem like this..
