The pinion spacer sits between the inner and outer pinion bearings and establishes the geometry the crush sleeve and pinion nut preload work against. It is a small part with no moving surfaces, but the dimension matters, and it should be replaced whenever the pinion is disassembled rather than reused out of an old housing.

Mopar Accessories 68090828AB Details:

• Fits select Jeep models with the applicable rear axle.
• Sets the spacing between the inner and outer pinion bearings.
• Machined to the factory dimension so pinion depth and preload set correctly.
• Genuine Mopar component. Sold individually.