Some 2010-2011 F-150 vehicles equipped 9.75 rear axle assembly may exhibit a shudder, chatter and/or vibration during slow, tight turns more and noticeable after cold startup. Concern maybe less noticeable once rear axle fluid warms up.
ISSUE Some 2010-2011 F-150 vehicles equipped 9.75 rear axle assembly may exhibit a shudder, chatter and/or vibration during slow, tight turns more and noticeable after cold startup. Concern maybe less noticeable once rear axle fluid warms up. Technical Service Bulletin # 11-11-6 Date: 111110 Drivetrain - Rear Axle Chatter/Shudder On Slow Turns TSB 11-11-6 11/10/11 9.75 REAR AXLE CHATTER - SHUDDER - VIBRATION ON SLOW TURNS FORD: 2010-2011 F-150 ACTION 2010 Ford Truck F 150 4WD V8-4.6L VIN 8 39 Follow service procedure to correct the condition. SERVICE PROCEDURE Insure the vehicle is equipped with original equipment 9.75 rear axle assembly before making repairs. Prior to starting with this procedure, soak all new friction (tabbed) plates from the kit in additive friction modifier for a minimum of 15 minutes. Save the additive friction modifier to install at the completion of this procedure. 1. Remove the rear differential carrier assembly. Refer to...