OEM 2009 Cadillac STS Drive Shaft

2009 Cadillac STS Parts Questions & Experts Answers

• Q: How to replace the front drive shaft on 2009 Cadillac STS?

  A: The first step for front propeller shaft replacement starts with properly supporting the vehicle. Start by removing the propeller shaft heat shield followed by marking the constant velocity (CV) joint of the propeller shaft which connects to the transfer case flange. To detach the CV Joint from the differential pinion flange use a flat-bladed tool to move the propeller shaft toward the back of the vehicle while working within the notch of the differential flange. You need to start by placing a flat-bladed tool in the transfer case flange notch then proceed toward the vehicle front to break the propeller shaft loose from its position. Check for smooth rotation of the CV Joint relative to the propeller shaft tube and also inspect for CV Joint or seal deterioration and grease leakage and evaluate the condition of all cv joints. If any damage is noted then the propeller shaft replacement is needed. After installing the CV Joint cone end into the transfer case flange the propeller shaft can be connected to both the transfer case flange and differential flange. The propeller shaft-to-flange bolts undergo scrutiny for damages or wear before cleaning threads for application of threadlocker gm p/n 12345493 (Canadian P/N 10953488) that requires ten-minute curing time. Install six propeller shaft CV Joint-to-differential flange bolts starting from number 1 to number 6 while tightening them to 30 nm (22 lb ft) after verifying crescent washers remain present. Use threadlocker on the cleaned threads before installing the front propeller shaft coupler-to-transfer case flange bolts which need torque to 30 nm (22 lb ft) without any rotational movement between the CV Joint and propeller shaft tube. The last step involves replacing the propeller shaft heat shield followed by lowering the vehicle.