Maintaining the correct viscosity is vital for the 1985 Dodge Ramcharger’s 5.2L engine, which requires 5.9 quarts of oil including the filter. The torque specification for the oil drain plug is 20 ft/lbs, a crucial detail during service to ensure the plug is secure without damaging the threads. Whether you operate in extreme cold or hot climates, synthetic oils provide consistent flow and protection. The engine benefits greatly from the advanced additive packages found in AMSOIL products, which help reduce friction and horsepower loss over time.
Coolant and Cooling System Protection
The cooling system in this classic vehicle plays a pivotal role in managing engine temperatures, especially when the vehicle is used for off-road work or towing. The cooling system capacity depends on whether the vehicle is equipped with air conditioning. With air conditioning, the total capacity is 16.9 quarts, while models without it require 15.9 quarts. It is essential to use a high-quality antifreeze that prevents corrosion and maintains the integrity of gaskets and hoses.
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a pre-mixed solution that exceeds original equipment requirements. It is a phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free formulation that offers protection for up to 150,000 miles or 5 years. Alternatively, AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers a concentrated formula that can be mixed with water for heavy-duty protection, lasting up to 150,000 miles or 5 years in passenger cars and light trucks.
Transmission and Transfer Case Lubrication
Proper transmission fluid is essential for the smooth operation of the Dodge Ramcharger’s automatic transmission. For the 3-speed automatic transmission (models A999 32RH and A727 36RH), the total fill capacity is 8.6 quarts, with an initial fill of 4 quarts. If equipped with lockup, the total fill is slightly less at 8.3 quarts. Keeping the fluid clean and free of sludge prevents shifting issues and extends the life of the transmission.
The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is designed to withstand the rigors of heavy towing and elevated temperatures. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use. For a more budget-friendly option that still offers synthetic benefits, the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid promotes smooth, shudder-free shifts and guards against leaks. For manual transmissions, which require 7 pints of gear lube, AMSOIL SEVERE GEAR 80W-90 is a top choice. Other viscosity options like SEVERE GEAR 75W-90 and SEVERE GEAR 75W-110 are also available to meet specific manufacturer recommendations.
Differential and Transfer Case Care
The transfer case and differentials in the Ramcharger require heavy-duty lubrication to handle the stress of four-wheel-drive operation. The NP208 transfer case holds 5.9 pints of fluid. For the transfer case, you can use the same AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid as specified. The torque for the drain and fill plugs is 18 ft/lbs.
For the front and rear differentials, such as the Spicer 44, 60F, and 70 models, specific gear lubes are recommended. The Spicer 44 and 60F front axles generally accept AMSOIL SEVERE GEAR 75W-140, AMSOIL SEVERE GEAR 80W-90, or 80W-90 grades depending on the ambient temperature. The rear Spicer 60 and 70 differentials also utilize AMSOIL SEVERE GEAR 80W-90, AMSOIL SEVERE GEAR 75W-90, or AMSOIL SEVERE GEAR 75W-110. Note that limited-slip differentials may require an additive like Mopar Trac-loc. The capacity varies by axle, with the Spicer 44 holding 5.7 pints, the Spicer 60F holding 6.6 pints, the Spicer 60 rear holding 5.9 pints, and the Spicer 70 rear holding 7 pints.
Brake Fluid and Power Steering
Safety systems should never be compromised. The hydraulic brake system for the Ramcharger requires a fluid meeting MS-4574 specifications. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers excellent responsiveness for ABS and traction control, providing a stable viscosity across a wide temperature range. For the power steering system, AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is recommended. It reduces friction, helps seals remain soft to prevent leaks, and offers strong anti-wear protection for quiet operation and high-temperature resistance.
Additional Products for Vehicle Care
To keep the vehicle running at its best, especially during seasonal changes, specific additives can be highly beneficial. AMSOIL P.i. Performance Improver can restore up to 14% horsepower and improve fuel economy, making it ideal for maintaining the performance of the 5.2L engine. For storage periods, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, while AMSOIL Engine Fogging Oil protects internal components from rust and corrosion. For cleaning and maintenance, AMSOIL Power Foam cleans deposits from the carburetor and induction system, and AMSOIL Engine Degreaser removes tough grime from engine surfaces.
Vehicle Background
The 1985 Dodge Ramcharger represents a significant era in American automotive history, blending the rugged utility of a truck with the comfort of a car. Based on the Dodge Magnum platform, this full-size SUV was designed to offer a capable four-wheel-drive system without the harsh ride typical of work trucks. The vehicle was powered by a variety of engines, including the robust 5.2L V8 featured in this guide, which provided a balance of power and efficiency for the time. It was a popular choice for families and enthusiasts who needed a versatile vehicle for both on-road commuting and off-road adventures.
With its distinct front-end styling and boxy design, the Ramcharger was a recognizable sight on American roads during the 1980s. The vehicle featured a solid rear axle and a part-time four-wheel-drive system that allowed drivers to engage the front wheels when traction was needed. The interior was generally spacious, catering to the growing demand for family-friendly SUVs that could handle snow, mud, and rough terrain. While it was not as heavy-duty as a commercial work truck, the Ramcharger was built on a durable chassis that could withstand years of service. Its reputation for reliability and practicality made it a favorite among owners who valued versatility over pure luxury or heavy towing capacity.
Owners of the 1985 Ramcharger often appreciate its simplicity and the ease of maintenance compared to more modern vehicles with complex electronics. The mechanical layout allows for straightforward service procedures, making it a favorite for DIY enthusiasts. The 5.2L V8 engine is known for its durability, though regular maintenance with high-quality lubricants is essential to ensure it continues to run smoothly. Keeping the cooling system clean and using the correct gear lubes for the transfer case and differentials are key to preserving the vehicle’s heritage and performance. For those looking to restore or maintain a Ramcharger, finding the right fluids ensures that this classic four-wheel-drive machine continues to perform as intended, honoring its legacy as a capable and reliable companion.