Pinion Bearing Preload

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Preload Spacer & Pinion Bearings

Courtesy of CHRYSLER GROUP, LLC

Pinon bearing preload is set using a select preload spacer (1) located between the pinion bearings (2).

Fig 2: Measuring Pinion Torque To Rotate

Courtesy of CHRYSLER GROUP, LLC

Measure Pinion Torque To Rotate (1) (PTTR) with an inch pound torque wrench (2). Pinion torque to rotate is 2.3 - 4.5 N.m (20 - 40 in. lbs.). Pinion torque to rotate (PTTR) is measured without the pinion seal.

Spacers are available in sizes from 27.23 - 28.1 mm (1.07 - 1.10 in.). A 0.025 mm (0.001 in.) change in spacer thickness will change pinion torque to rotate approximately 3.38 mm (30 in. lbs.).

NOTE:

To increase PTTR install a thinner spacer. To decreases PTTR install thicker spacer.