2009 Toyota 4runner Transmission Problems

Your 4Runner's transmission may slip and rev to high RPMs when you try to accelerate after slowing down below 15 mph, especially during turns or in traffic. This causes a dangerous delay between when you press the gas pedal and when the transmission actually engages, creating risky situations like crossing oncoming traffic. The dealership was unable to diagnose or fix the problem at 24,000 miles. A transmission fluid flush, filter replacement, or transmission control module reprogramming might be needed to resolve the slipping issue.

Your transmission slips and revs to high RPMs when you try to accelerate after slowing below 15 mph, such as during turns or in traffic. This causes a dangerous delay between pressing the gas pedal and the transmission actually engaging, making it hard to accelerate quickly when needed—particularly risky when turning across oncoming traffic. The fix will likely require transmission service or potential internal repairs to restore proper gear engagement.

While you were in a parking lot trying to stop your car in Drive, it unexpectedly accelerated instead of slowing down. You had to press hard on the brakes to regain control, then turn off the engine and shift to Park. This unintended acceleration issue may involve the throttle control system or transmission response.

Your 4Runner has a transmission delay problem when accelerating after slowing down. When you step on the gas after turning or merging into traffic, the engine revs at 2500-3000 RPM for several seconds before the transmission actually engages, causing the vehicle to suddenly lurch forward. This has happened consistently since purchase and persists even after the dealership reset the computer, creating a safety concern during highway merges.

Your transmission is slipping and hesitating to engage gears when you're driving at low speeds, especially when slowing down for turns or speed bumps. When you press the accelerator, the vehicle doesn't respond properly, which creates a safety concern when turning across traffic. This appears to be a recurring issue affecting multiple vehicles from this model year. Your transmission may need diagnostic testing and potential internal repairs or fluid servicing to address the engagement problem.

Your transmission is slipping when it shifts into a higher gear at around 10 mph, which you first noticed at 400 miles. This happens after you slow down (like for a turn) and then accelerate again—not from a complete stop. The dealership hasn't found a solution and says Toyota hasn't issued a technical service bulletin for this issue. A transmission fluid flush, filter replacement, or internal transmission repair may be needed to address the slipping.

Your transmission slips and hesitates when you slow down to turn and then accelerate again. The engine revs up to 2,500 RPM while the car doesn't move, then suddenly catches and lurches forward. This happens consistently and is getting worse, creating a safety concern when traffic is behind you. The dealership diagnostic showed no problems and suggested it's normal transmission communication delay, but the issue persists. A transmission fluid check, filter replacement, or internal transmission inspection may be needed to diagnose the slipping.

I HAVE A 2001 TOYOTA 4RUNNER. THE REAR DIFFERENTIAL LEAKS OIL THROUGH PIN HOLES, AND FROM WHAT I HAVE READ, MINE IS NOT THE ONLY ONE. THE CAR BARELY HAS 100,000 MILES ON IT, AND THE DIFFERENTIAL SHOULD LAST AS LONG AS THE CAR. THE RISK IS THAT IT WILL RUN DRY, SEIZE, AND THE REAR WHEELS WILL LOCK UP CAUSING AN ACCIDENT. THIS IS CLEARLY A DEFECT BY TOYOTA REDUCING THE COST OF THEIR MATERIAL THE CONSTRUCT THE DIFFERENTIAL HOUSING WITH. *TR