OEM 2008 Cadillac STS Drive Shaft

2008 Cadillac STS Parts Questions & Experts Answers

• Q: How to replace the front drive shaft on 2008 Cadillac STS?

  A: Raising and supporting the vehicle becomes the first step when changing the front propeller shaft. The first step requires removal of the propeller shaft heat shield followed by marking the constant velocity (CV) joint that connects to the transfer case flange. Insert a flat-bladed tool into the notch on the differential flange and then break the propeller shaft CV Joint-to-differential flange bolts. The propeller shaft should be guided back while moving toward the rear to separate the CV Joint from the differential pinion flange before removing the CV Joint-to-transfer case flange bolts. You should insert a flat-bladed tool into the transfer case flange notch and move the propeller shaft in front of the vehicle to detach it from the flange. Test the propeller shaft by checking for easy rotational movement between its CV Joint and the propeller shaft tube as well as checking for grease leaks and inspecting both cv joints and seals for damage and both cv joints for binding. Replace the front propeller shaft in case any issues are detected. Installation requires proper insertion of the coned CV Joint end into the transfer case flange before fastening the propeller shaft to both transfer case and differential flanges. Inspect the propeller shaft-to-flange bolts for damage and wear and replace them when needed while cleaning threads with gm p/n 12345493 threadlocker (Canadian P/N 10953488) that requires curing time of 10 minutes before installation. The CV Joint-to-differential installation requires bolts with crescent washers that need sequential torquing to 36 n.m (27 lb ft) followed by the same procedure for CV Joint-to-transfer case flange bolts. Determine whether the CV Joint moves rotationally against the propeller shaft tube before reinstalling the heat shield and lowering the vehicle.