Checks, in order
- Shift procedure and speedFollow the manual: shift 2H to 4H at low speed on a loose surface, and 4L only when stopped in Neutral. Shifting too fast or on dry pavement can leave the indicator flashing.easy $ · under about $50
- Tire sizes and tread wearMismatched or very unevenly worn tires create binding and can trigger problems. Measure the circumference of all four.easy $ · under about $50
- Fluid levelsCheck the transfer case and both differentials for correct level and any leaks. Low or wrong fluid causes noise and shift trouble.easy $ · under about $50
- Switch and linkageCheck the transfer case shift motor connector (if equipped) and the 4WD switch wiring for corrosion or damage, and the lever linkage for binding on lever-type trucks.medium $$ · about $50 to $500
- Transfer case actuatorOn trucks with an electric shift motor, if it does not move at all, have the actuator tested or replaced.hard $$$ · shop-level job, $500+
Applies to: 5th generation 4Runner, 2010 to 2024, with the 1GR-FE 4.0L V6 and the 5-speed automatic. Assumes the stock configuration; trim-specific items (KDSS, sunroof, A/C) are noted where they apply.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Gear oil for your truck | Changing front diff and transfer case oil to the factory spec | Shop on Amazon |
| Fluid transfer pump | Filling through the fill or check plug | Shop on Amazon |
| Digital multimeter | Voltage, ground and continuity checks | Shop on Amazon |
| 1/2" drive click torque wrench | Tightening suspension and driveline bolts to spec | Shop on Amazon |
Other drivetrain problems on the 5th Gen 4Runner
More 5th Gen 4Runner problems
- Rust on the frame, flaking, or holes in the frame rails (Frame & Body)
- KDSS warning, fluid leak, or clunking and uneven ride on a KDSS truck (Steering & Suspension)
- Oil leak or oil smell from the front of the engine (Engine)
- Rough idle, shaking, or misfire with a flashing check engine light (Fuel & Ignition)
- Check engine light with P0171 or P0174, system too lean (Fuel & Ignition)
- Check engine light with P0420 or P0430, catalyst efficiency (Emissions)
All 16 5th Gen 4Runner symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.