The Bilstein 5100 rear shock for the 2014–2015 Ram 2500 is a 46mm monotube unit from Bilstein's 5100 line, which is built for lifted and heavy-duty pickups. A single-tube body moves heat from the oil to the shock body more quickly than a twin-tube design, which helps resist fade during repeated hard use such as towing or rough-road driving. Compared with a budget rear shock, the 5100 is the better choice for owners who want a more controlled, repeatable ride under a loaded bed. Search terms buyers use include 2014 Ram 2500 rear monotube shock upgrade, 2015 Ram 2500 Bilstein 5100 rear, and heavy-duty pickup rear shock replacement.
Owners on user forums report that the 2014-and-later Ram 2500 rear shocks are top-threaded and that the shock passes up through the frame rail, since the rear uses coil springs. The factory rubber bushings are typically reused with the Bilstein capture washers and locknut. Owners on user forums also advise against the smaller rubber bushings in the hardware pack, which they say do not fit the frame holes. Replacement takes a few hours with basic hand tools, so budget time for stubborn fasteners. Follow the manufacturer's torque specifications, and check fitment against your ride height before ordering.
Owners on user forums report reusing the factory Ram rubber bushings along with the Bilstein capture washers and locknut. They advise against using the smaller bushings included in the hardware pack, which they say do not fit the frame holes.
An owner on a user forum advises not to overtighten the locknut and to stop once two to three threads are visible above the nut. Use the manufacturer's torque specification as the final reference.
This is a moderate-difficulty job that suits a home mechanic with jack stands, a socket set, and a torque wrench. Support the truck securely before removing the factory shock. Owners on user forums report that removing the factory shocks and steering damper took about an hour and reinstalling the Bilstein parts took about 30 minutes, though that timing included more than the rear shocks alone. Watch for seized fasteners and use penetrating oil before loosening them. Reuse the factory rubber bushings, not the small ones in the kit, and avoid overtightening the locknut.
