NV3550 Manual Trans for 2002-2004 Jeep Liberty, 2WD, 5 Speed

Description

Suppress countershaft bearing chatter, eliminate second gear engagement notchiness, and stabilize manual shift linkage travel under 235 lb-ft continuous torque across demanding municipal courier service routes with the Jeep Liberty NV3550 Remanufactured Manual Transmission configured for 2002 to 2004 Jeep Liberty two-wheel drive utility vehicles powered by 3.7L PowerTech V6 engines.

A split-case cast aluminum housing design encloses case-hardened 8620 steel helical gear sets, carbon-composite synchronizers, and heavy tapered roller bearings. Independent intermediate shaft supports eliminate mainshaft flex under heavy acceleration. The gearbox weighs 97 lbs dry, holds 2.1 quarts of Synchromesh manual lubricant, and incorporates a rear slip yoke extension housing.

Key Features of Jeep Liberty

Municipal fleet mechanics choose to buy Jeep Liberty manual transmission gearboxes to restore positive shifter response and end gear popping under high engine acceleration. Every unit undergoes complete mechanical teardown and precise dial indicator bearing shimming.

• 5-speed manual gear ratios provide tight steps to keep 3.7L engines inside peak torque bands.
• Carbon-composite synchronizer rings eliminate shift notchiness between first, second, and third forward speeds.
• Case-hardened steel shift forks resist deflection under rapid commercial driver gear changes.
• Precision ground gear faces minimize operational whine during sustained highway freight transit.
• Jeep Liberty NV3550 two-wheel drive packages include new front input quill guide tubes.
• High-temperature casing seals stop gear fluid weepage under heavy commercial route conditions.
• Magnetic fluid drain plugs collect fine iron particles from internal gear meshes between service drains.

Torque Rating Gear Multiplication Matrix

Engineered to handle 240 lb-ft continuous input torque at 3,200 RPM, this manual gearbox handles heavy commercial utility service without shaft deflection. Structural casing walls dissipate gear friction heat to keep lubricant sump temperatures below 180°F under full payload. Forward mechanical reduction ratios measure 4.01:1 first, 2.33:1 second, 1.39:1 third, 1.00:1 fourth, and 0.78:1 fifth gear overdrive.

Driveline Output Spline Interface Alignment

The transmission output shaft incorporates a 27-spline slip yoke interface machined to tight concentric tolerances. Driveshaft slip yoke journals maintain under 0.001-inch total radial runout to stop high-speed driveline vibration across rear universal joints. Front bell housing surfaces bolt flush to factory Chrysler 3.7L engine blocks using high-tensile alignment sleeves.

Pre-Service Inspection Operational Boundaries

Technicians must inspect clutch master pushrod clearance and verify pedal free play before clearing trucks for fleet operation. This manual gearbox is not engineered for quarter-mile drag racing, forced induction turbo conversions, or gross combined vehicle weights exceeding factory tow limits.

• Inspect external manual shift boot rubber and floor pan seals every 15,000 miles.
• Drain and replenish manual transmission fluid using approved Synchromesh lubricant every 30,000 miles.
• Verify driveshaft universal joints and rear transmission mount isolator rubber integrity every 12 months.

Fleet Guarantee Package Shipping Manifest

Protected by a 3-Year / 100,000-Mile commercial fleet warranty covering components and authorized repair labor. The heavy-duty shipping container includes the remanufactured manual gearbox, replacement shifter tower gasket, throwout bearing collar, installation documentation, and a dynamometer spin-test verification record.