The JEGS 555-60099 ring and pinion is a direct-fit 3.55:1 gear set for the Chrysler 9.25 in. ZF rear axle. The ring and pinion are precision cut and lapped as a matched pair for correct tooth contact, quiet operation, and dependable power transfer through the differential.

JEGS 555-60099 Chrysler 9.25 in. ZF Rear Axle Ring and Pinion Features:

• Fits 2011-2019 Ram
• Fits Chrysler 9.25 in. ZF rear axle
• 3.55:1 gear ratio
• 39 ring gear teeth and 11 pinion gear teeth
• 29-spline pinion
• Standard rotation ring gear
• 9.250 in. ring gear diameter
• 1.875 in. pinion shaft diameter
• Precision cut and lapped as a matched set

JEGS 555-60099 Chrysler 9.25 in. ZF Rear Axle Ring and Pinion Notes:

• Fits 2011 and newer ZF-built axles
• Ring gear has 14mm x 1.00 bolt holes
• Not interchangeable with the earlier 9.25 in. 12-bolt axle
• Ring and pinion only; an installation kit is not included
• Crush sleeve, bearings, shims, pinion seal, pinion nut, and ring gear bolts are sold separately
• Professional installation is recommended; correct backlash, pinion depth, and bearing preload must be set during installation
• Follow a proper gear break-in procedure to maximize gear life