Checks, in order
- Note the conditionsRecord whether it happens cold or warm, light or heavy throttle, in which drive mode, and whether the truck is in a hybrid or turbo-only model. Patterns help the dealer.easy $ · under about $50
- Try a different drive modeCompare Normal, Eco and Sport. Throttle mapping changes shift feel, so you can tell a mapping trait from a mechanical fault.easy $ · under about $50
- Check for bulletins and calibration updatesAsk the dealer whether a transmission or powertrain calibration update exists for your VIN. Early trucks often get software adjustments.easy $ · under about $50
- Rule out mounts and drivelineA clunk when the truck first takes load can also be an engine or transmission mount, driveshaft joint or a loose component. Look for movement or play underneath.medium $$ · about $50 to $500
- Fluid level check by the dealerLeave transmission fluid checks to a dealer or qualified shop, since the procedure is temperature sensitive. Avoid changing the fluid yourself while under warranty.medium $$ · about $50 to $500
Applies to: 6th generation 4Runner, 2025 and newer, with the 2.4L turbocharged i-FORCE and the i-FORCE MAX hybrid, both with the 8-speed automatic. This is a new platform with little long-term history, so most entries are general symptoms; when the truck is under warranty, the dealer is the right first stop.
Tools and parts for these checks
Links below are affiliate links: toyotadata earns a commission from VEVOR and, as an Amazon Associate, from qualifying Amazon purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Automatic transmission fluid for your truck | Topping off or changing to the factory fluid type | Shop on Amazon |
| ATF fill pump with transmission adapters, 8 L | Filling fill-and-check transmissions through the fill plug | Shop on VEVOR |
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
More 6th Gen 4Runner problems
- Something is wrong on a new 4Runner: warranty, recalls and where to start (Body & Electrical)
- Digital gauge cluster blank, missing speedometer, or warning lights not showing at startup (Body & Electrical)
- Front brakes squealing or chirping on a new truck (Brakes)
- Hybrid won't go to READY, or dead 12 V battery in the i-FORCE MAX (Hybrid System)
- Won't start or crank on the 2.4L turbo (non-hybrid) (Starting & Charging)
- Check engine light on, with or without a code (Engine)
All 14 6th 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.