2002 Jeep Wrangler SE, Sport, Sahara Factory Service Manual (P/N 81-370-02063)

• Built for owners and workshops servicing the 2002 Jeep Wrangler SE, X, Sport, and Sahara variants, including LHD and RHD configurations.
• Engine removal, cylinder-head repair, timing-chain service, and crankshaft/piston inspection for the 2.5L four-cylinder and 4.0L six-cylinder gasoline engines.
• Covers internal overhaul of the AX5 and NV3550 manual transmissions, 30RH and 32RH automatics, and NV231 transfer case, with transmission-specific diagnosis and adjustment procedures.
• Details the teardown and assembly of the 181FBI front axle and 194RBI/216RBI rear axles, including Trac-Lok differential repair where equipped.
• Chassis procedures address wheel alignment, brake hydraulic-system bleeding, ABS component service, and power-steering gear repair.
• Separate Body, Chassis, and Gas Powertrain diagnostic manuals provide DTC-based and symptom-based troubleshooting, circuit tests, connector views, and post-repair verification routines.

Manual Set and Configuration Coverage

This set contains 2,128 PDF pages across six files: a 1,595-page DaimlerChrysler service manual, 162-page Body diagnostic manual, 52-page Chassis diagnostic manual, 316-page Gas Powertrain diagnostic manual, two title/foreword pages, and a one-page navigation file.

VIN and body-code decoding, axle identification, and transmission identification information help distinguish the installed equipment before selecting repair procedures. Oxygen-sensor documentation distinguishes Federal and California/European III configurations where applicable.

Engine and Drivetrain Repair

Mechanical diagnosis includes compression and cylinder-leakage testing, oil-pressure checks, and oil-leak testing. Internal engine sections cover valve-seat work, bearing fitting, piston-ring fitting, and front and rear crankshaft seals. Ignition coverage distinguishes the distributor-equipped 2.5L from the 4.0L coil-rail system, with an exploded distributor view and camshaft-position sensor/oil-pump-drive service information.

Clutch diagnosis, disc replacement, flywheel inspection, and hydraulic-linkage service have their own section. Manual-transmission sections cover shift mechanisms and synchronizers. Automatic-transmission coverage adds hydraulic-pressure testing, clutch and band air tests, valve-body service, and cooler flushing. Transfer-case procedures extend to chain replacement and shift-linkage adjustment. The NV231 oil pump is covered as a replacement assembly, not an internally rebuildable unit.

Differential setup covers pinion depth, ring-gear backlash, side-gear clearance, and bearing-preload shim selection. Gear Tooth Contact Patterns charts support contact-pattern evaluation. Propeller-shaft repair covers single- and double-Cardan universal joints and driveline vibration diagnosis. The axle procedures warn that excessive housing spread can distort or damage the differential housing.

Suspension, Cooling, and Body Service

The manual covers coil springs, shock absorbers, stabilizer bars, track bars, and control arms, along with hub/bearing units and ball joints. Base-brake sections cover disc and drum service, power-booster testing, and parking-brake adjustment. Cooling-system diagnosis addresses overheating, coolant leakage, and viscous fan-clutch operation.

Body repair extends to full and half doors, hard and soft tops, windshield-frame service, body-opening dimensions, and weld and sealer locations. Heating and air conditioning coverage includes HVAC-housing teardown, heater-core and evaporator replacement, vacuum diagnosis, and refrigerant-system testing.

Working on heavy suspension and drivetrain components poses crushing or pinching hazards. Always use properly rated jack stands and hoists before getting under the vehicle.

Diagnostics and Wiring Documentation

Gas Powertrain diagnosis addresses no-start conditions, misfires, fuel delivery, oxygen-sensor and EVAP faults, torque-converter-clutch circuits, and Sentry Key Immobilizer System problems. PCM/SKIM replacement programming and ignition-key programming are also covered.

Body diagnostics cover airbags, the electro/mechanical instrument cluster, rear-window defogging, and PCI-bus communication. Chassis diagnostics concentrate on Teves ABS, including wheel-speed sensors, the G-switch, pump-motor faults, and controller communication.

Electrical references include 8W-30 Fuel/Ignition System, 8W-80 Connector Pin-Outs, and the Airbag System and Vehicle Communications schematics. Connector, ground, and splice locations accompany the circuit diagrams.

Special Tools and Specification Data

Component-specific torque tables, fluid capacities and lubricant requirements, wear limits, clearance specifications, pressure-test data, and electrical test values are provided for the covered assemblies.

The diagnostic procedures specify the DRBIII scan tool and system-specific test equipment. Special-tool callouts include Dial Indicator C-3339, airbag load tools 8310 and 8443, and Evaporative Emissions Leak Detector 8404. The powertrain manual also identifies test-light use on sensitive sensor and communication circuits as a potential cause of PCM damage.