Dorman 635-450 Engine Crankshaft Seal Retainer - Rear

Rear Main Seal Retainer for Ram and Dodge

Dorman 635-450 is an engine crankshaft seal retainer for the rear main seal area on select Ram and Dodge trucks. It is built from steel with an uncoated natural finish and follows standard replacement dimensions for a direct-fit service part.

Key Features

• Steel construction for engine sealing support at the rear main seal
• Uncoated natural finish
• Gasket or seal included
• Standard replacement grade
• Mounting hole quantity: 6
• Fits rear applications on select Ram 2500, Ram 3500, Ram 4000, Dodge Ram 2500, and Dodge Ram 3500 models

Product Details

This Dorman crankshaft seal retainer is engineered to secure the rear main seal on specified vehicle years, makes, and models, matching the fit and function of the original retainer when the factory part has leaked or failed from seal deterioration. The steel body measures 5 in inside diameter, 6.2 in outside diameter, 1.1 in thickness, and 1.8 in depth, with a 10.5 in width and 7.25 in length. Dorman 635-450 is a practical OE-style service part for rear engine sealing repairs on Ram and Dodge applications.

This part cross-references 5086755AC for the same application.

Fitment

• Fits 2011-2021 Ram 2500, rear
• Fits 2011-2021 Ram 3500, rear
• Fits 2011-2013 Ram 4000, rear
• Fits 2003-2010 Dodge Ram 2500, rear
• Fits 2003-2010 Dodge Ram 3500, rear

Common Repair Uses

• Rear main seal leakage at the crankshaft seal retainer
• Seal deterioration around the engine rear cover area
• Oil seepage from a worn or damaged retainer surface
• Replacement of a failed original retainer on Ram and Dodge trucks

Installation Notes

Inspect the rear main seal surface, crankshaft sealing area, and mating surfaces before installation. Replace any damaged seal components and verify bolt-hole alignment and depth before tightening. Confirm vehicle year, make, model, and rear position match the listed fitment for Ram 2500, Ram 3500, Ram 4000, Dodge Ram 2500, and Dodge Ram 3500.

Quality Assurance

Dorman manufactures this part as a standard replacement component for service repairs where the original retainer has failed. The included seal helps support a complete rear main seal service on the listed applications.