This bulletin applies to 2016-2020 Cadillac CT6 vehicles. Customers may comment about a whining/whirring, whistling, squeaking or groaning/growling noise at low speed maneuvers up to 40 mph.
Remove the front wheel drive intermediate shaft housing (indicated by the number 1 illustration).
Photo courtesy of Mitchell 1
Attach the DT-44467 output shaft assembly remover/installer to the shaft. Attach the GE-6125-1B slide hammer to the shaft remover.
This bulletin applies to 2016-2020 Cadillac CT6 vehicles. Customers may comment about a whining/whirring, whistling, squeaking or groaning/growling noise at low speed maneuvers up to 40 mph.
Photo courtesy of Mitchell 1
Using the tool, remove the front wheel drive intermediate shaft from the differential carrier.
The noise may seem to be coming from the engine/wheel area. The cause may be fretting between the intermediate shaft and the front intermediate shaft bearing/housing (IDS bearing).
Photo courtesy of Mitchell 1
Remove the support bearing snap ring (1).
The fretting is the result of having a slip fit interface between the bearing and the IDS shaft, combined with a bearing that has around 0.5 Nm of torque to rotate.
Photo courtesy of Mitchell 1
Using bearing tool J-06133-A, press the bearing from the housing. Position the new bearing to the housing. Using bearing tool J-41736, press the bearing into the housing until seated. Install a new ring.
Perform a road test to identify the noise at this area. Chassis eras will be helpful.
Photo courtesy of Mitchell 1
Using High Strength Slip Fit Bonding Compound P/N 19333514, apply a thin coating to cover the new inner bearing race. Install the new IDS shaft.
If confirmed, replace the IDS shaft and IDS shaft housing.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
