I have a 2011 7AT SP at 33K miles and it has almost the exact same problem as you described, except the grinding noise I had isn't loud, but soft and barely noticeable, and happens at around 4K RPM. I always assumed it was an exhaust bolt that wasn't tightened.
I agree that it feels like the torque converter is not unlocking and isn't slipping. When you put it in gear (R or D), it would take about a half second for the engine to start to stall, and you would have to shift to P or D or the engine would die. Other than that, the engine idles and revs normally.
My car has been at the dealership a week and a half. First they said they changed out the torque converter and the transmission valve body. That fixed it little, but it would still stall. They now think there is something wrong with the transmission itself. I'm now getting a new transmission, fortunately my car is still under warranty.
Quote:
Originally Posted by ZeN
Bros,
Need urgent help..my 7at z34 started having problem yesterday while I'm on a long journey. Everytime I come to complete stop in gear 1 or starting to move, P to D, the car will stall, jerk n die. No codes or light being thrown on the dash..theres also loud grinding noise driving from 1k to 1.9k rpm...the rest of the transmission behave normaly, means I can drive in both D and M all the way to gear 7 once I get it to move..I manage to get the car to jump by applying slight trottle before shifting from N to D or moving to N before coming to complete stop. Car also idle perfect in P or N. To me its either
1. Torque conveter not stalling
2. Idle to low
Did any of you 7at owner ever experienced this issue..car is stock but I do push the car hard
To me..its either
|