NV4500 Manual Trans for 1998-2000 RAM 5.9L, 5 Speed

Description

A 5.61:1 first gear reduction ratio paired with ductile cast iron casing architecture transfers 335 lb-ft continuous torque to accelerate loaded commercial four-wheel drive work trucks using the Dodge RAM 5.9L NV4500 Remanufactured Transmission engineered for 1998 to 2000 RAM 1500 and 2500 four-wheel drive trucks powered by 5.9L Magnum V8 gas engines.

An engineered single-piece cast iron housing encloses carbon-composite synchronizer rings, needle bearing supported countershafts, and shot-peened gear clusters. Hardened steel shift rails guide reinforced selector forks to secure positive gear engagement. The complete gearbox registers 195 lbs dry weight, holds 4.0 quarts of manual transmission fluid, and terminates in a round four-wheel drive transfer case adapter.

Key Features of Dodge RAM

Commercial fleet maintenance managers choose to buy Dodge RAM four-wheel drive manual transmission gearboxes to restore positive five-speed engagement and reduce highway drivetrain vibration. Every gearbox receives brand new synchronizer friction rings and high-grade roller bearings.

• 5-speed manual gear ratios provide broad torque bands for severe off-pavement hauling.
• Carbon-composite synchronizer assemblies eliminate shift resistance during rapid lower gear changes.
• Shot-peened gear tooth profiles absorb heavy shock loads without surface fatigue or pitting.
• Upgraded shift selector rail bushings prevent shifter stick bind under high cab floor heat.
• Dodge RAM NV4500 four-wheel drive packages include high-grade sealed bearings on shaft positions.
• Precision Viton input and rear adapter seals prevent gear fluid leaks under continuous hauling.
• Rare-earth magnetic drain plugs capture metal particulate to protect internal needle bearings.

Dynamic Torque Transfer Gear Ratios

Rated for 410 lb-ft continuous input torque at 3,200 RPM, this transmission handles demanding commercial utility routes without shaft deflection. Exterior housing cooling ribs hold gear fluid sump temperatures below 185°F under high ambient conditions. Internal reduction ratios feature 5.61:1 first, 3.04:1 second, 1.67:1 third, 1.00:1 fourth, and 0.73:1 fifth gear overdrive.

Transfer Case Flange Spline Engagement

A precision-machined 23-spline output shaft connects with New Process transfer cases without excess lash. Shaft concentric runout holds under 0.001 inches, eliminating high-speed driveline vibration through the cab floor. Front bell housing bolt patterns align flush with Dodge Magnum V8 engine block dowel locations.

Shift Verification Fleet Maintenance Standards

Inspect hydraulic clutch master and slave cylinder line connections and bleed hydraulic fluid thoroughly before starting the engine. This five-speed transmission is not engineered for mud bogging competitions, tractor pulls, or vehicles pulling trailers exceeding 10,000 lbs total weight.

• Check hydraulic clutch fluid levels and pedal travel every 10,000 miles.
• Drain and refill transmission fluid using approved manual transmission lubricant every 30,000 miles.
• Inspect transfer case adapter seals and crossmember mount cushions every 12 months.

Fleet Guarantee Secure Crate Contents

Delivered with a 3-Year / 100,000-Mile commercial fleet warranty covering parts and qualified repair shop labor. The heavy freight container contains the remanufactured five-speed manual transmission, fresh transfer case adapter gasket, alignment guide dowels, vehicle installation manual, and a dyno spin-test report.