Question 1

How to replace the Rear Crossmember in the rear suspension on Chevrolet Corvette?

Accepted Answer

First lift your vehicle then support it and disconnect all tire and wheel parts. Disengage wheel speed sensor harness connectors when disconnecting park brake cables from actuator levers and electronic suspension control (ESC) shock absorbers harnesses when equipped. Follow this sequence to replace the crossmember: disconnect first the rear suspension position sensors, the inner tie rod end studs and lower control arms from their crossmember attachment. Begin by supporting the lower control arms and tie rods and rear suspension knuckles before breaking free the transverse spring. Position the transmission support fixture (J 42055) onto a transmission jack before placing and securely fastening it to the transmission for support. Disassemble all electrical harness retainers and brake pipe retainers from the crossmember before using a transmission jack to position it underneath the Rear Crossmember. Secure the transmission jack in place. Use only hand tools to remove the Rear Crossmember mounting nuts then discard them. Installation requires the correct alignment of crossmember dowel pins to frame rails plus transaxle mount studs to the crossmember using new crossmember mounting nuts. Through manual operation only install the new rear suspension crossmember mounting nuts before tightening them to 110 n.m (81 lb ft). Remove the transmission support fixture (J 42055) from the transmission followed by removing the jack from the crossmember. Reinstall all electrical harness retainers and brake pipe retainers onto the crossmember before installing the transaxle mount lower nuts and transverse spring and lower control arms and inner tie rod end studs. If your vehicle includes esc Shock Absorber harnesses, install rear suspension position sensors before connecting electrical connectors to the esc Shock Absorber harnesses and attaching park brake cables to actuator levers followed by reconnecting the wheel speed sensor harness connector. After installation of tires and wheels you should lower the vehicle to perform measurements for rear trim height adjustment and complete rear wheel alignment procedures.

Question 2

How to service and repair the Rear Crossmember on Chevrolet Prizm?

Accepted Answer

In order to service and repair the rear suspension cross-member, it is important to raise, and support the vehicle. To remove the lh rear suspension Trailing Arm, you need to remove the nut and bolt to disconnect the rear suspension knuckle to the rear suspension Trailing Arm, while at the same time separating the rear suspension Trailing Arm on the rh to separate it also. Next, take off the 2 nuts, 3 washers, and lh rear suspension rear lower Control Arm, and then the same of the rh rear suspension rear lower Control Arm. Support the rear suspension crossmember using a jack, then remove the 2 bolts holding the rear suspension support brace to body and the 4 bolts holding the rear suspension crossmember to the body before lifting the crossmember. In case of a replacement of the rear suspension crossmembers, take off the two bolts and the rear suspension support bracket from the crossbar. Remove the two inner bolts, four washers, lh rear suspension front lower Control Arm, and rh rear suspension front lower Control Arm, from the rear suspension crossmember. For installation, attach the rear suspension support brace to the rear suspension cross member using 2 bolts secured to 19 nm (14 ft. Lbs) and do not install the lower Control Arm until the rear lower Control Arm is installed. Mount the lh and rh rear suspension front lower control arms, 4 washers and 2 inner bolts without tightening. Jack up the rear suspension crossmember and secure with 6 bolts, tightening the 4 outer bolts to 74 nm (55 ft. Lbs.) and the 2 inner to 19 nm (14 ft. Lbs.). Take out the jack and then install the lh rear suspension rear lower Control Arm, and install 3 washers plus 2 nuts loosely; then install the rh rear suspension rear lower Control Arm and the same components. Mount the lh rear suspension Trailing Arm to the rear suspension knuckle and do not tighten the bolt and do the same on the rh rear suspension Trailing Arm. Wheels off, lower and three, and drive a lift rack. Lift suspension by bouncing the vehicle and allow to settle and tighten the 2 rear suspension Trailing Arm to knuckle nuts and bolts to 91 nm (67 ft. Lbs.) and 4 rear suspension Control Arm nuts and bolts to 125 nm (89 ft. Lbs.). Check the rear wheel alignment and correct it if required prior to taking the car off the alignment rack.

Question 3

How to replace the rear crossmember for the steering gear on Chevrolet SSR?

Accepted Answer

You should first raise and support the vehicle to begin the replacement of the rear steering gear crossmember. Unbolt the rear mounting points of the rear steering gear crossmember as well as the rear mounting bolts on the front steering gear crossmember and carefully take the crossmember out from the vehicle. Align the rear steering gear crossmember with its mounting holes, put in the bolts, and tighten them to 50 N.m (37 lb ft). Following this, put in and tighten the rear mounting bolts for the front steering gear crossmember to 50 N.m (37 lb ft), then lower the vehicle.

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