2005 Dodge Ram 2500 Pickup Owner Manual - Page 298

298 STARTING AND OPERATING Axle Lubricant and Trailer Towing 1500 Models • 1500 Model rear axles are trailer tow ready. Limited slip rear axles on 1500 models require the use of a limited slip additive (refer to the "Recommended Fluids, Lubricants, and Genuine Parts" section.) • The limited slip additive is included with the factory fill. • If the axle fluid is changed, 4 oz. (118 ml) of limited slip additive must be added. 2500/3500 Models • The Axles on 2500/3500 Models are trailer tow ready and DO NOT REQUIRE any special axle lubes or additives. Trailer Towing Recommendations • All trailer hitches should be professionally installed on your vehicle. • Safety chains must always be used between your vehicle and trailer. • Do not interconnect the hydraulic brake system or vacuum system of your vehicle with that of the trailer. This could cause inadequate braking and possible personal injury. An electrically-actuated electric trailer brake controller is recommended. • Trailer brakes are recommended for trailers over 1000 lbs (454 kg) and are required for trailers in excess of 2,000 lbs (907 kg) • Use an approved wiring harness connector on the trailer. Standard equipment on all RAM pickup models provides a 4-way trailer tow connector located