PIP4466: Rattle Noise At Idle From Front Of Transmission Area - keywords bearing driveshaft prop propshaft shaft torque tube - (Sep 4, 2008)
Subject: Rattle Noise at Idle from Front of Transmission Area
Models: 2006-2009 Chevrolet Corvette Equipped with 6L80 (RPO - MYC) Automatic Transmission
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may comment on a rattle noise at idle with the transmission in gear. This noise may be heard from the area of the rear of the driveline support and front of the transmission.
This conditions may be caused by the driveline support, rear prop shaft coupling nut (1) being loose allowing the hub (2) to move on the flexplate spindle (11) (see SI document 499587 for illustration). This nut should be torqued to 90 Nm (60 lb ft).
If the nut is found to be loose remove the nut, clean the threads and apply threadlock P/N 12345382 (Canada P/N 10953489) or equivalent to the threads of the spindle.
Tighten the nut to 90 Nm (60 lb ft). If the nut is not loose inspect the torque tube bearings prior to replacement of the torque converter or transmission oil pump.