Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Rear Driveline Module: Description
The rear driveline module assembly (Fig 1 ) consists of three main components:
- Bi-Directional Overrunning Clutch (BOC)
- Viscous Coupling
- Differential Assembly
The viscous coupling and bi-directional overrunning clutch are contained within an overrunning clutch housing, which fastens to the differential assembly. The overrunning clutch housing and differential assembly have unique fluid sumps, each requiring their own type and capacity of fluid. The overrunning clutch housing requires Mopar(R) ATF+4. The differential assembly requires Mopar(R) 75W-90 Gear and Axle Lubricant.
Driveline module service is limited to the following components:
- Differential Assembly (serviced only as assembly)
- Viscous Coupling
- Bi-Directional Overrunning Clutch (BOC)
- Overrunning Clutch Housing
- Seals (Input Shaft, Output Shaft, Overrunning Clutch Housing O-rings)
- Input Flange/Shield
- Vents
- Fasteners
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.