2015 Toyota Tacoma Powertrain (other) Problems

Driving around a winding turn incline , tacoma hesitated at 40 mph while going down incline. Tacoma rpms fluctuates at 40 mph as if the engine is having difficulty accelerating. You can hear the engine stalling or shuttering to catch up to speed. This is occurred driving at a steady 40mph. The Tacoma seems to be stalling out at a certain speed limit and rpm at 40 mph. It only has this symptom at 40 mph going down an incline. This is dangerous and there were vehicles behind me traveling at the same speed going around a winding turn incline. This could of caused a pile up because of the tacoma struggling to maintain speed and accelerate to keep speed. Ive taken this tacoma to Nalley dealer and they've replicated the problem but thought if resetting driving mode would clear the problem. That did not clear the problem and its currently causing the same issue. The tech seems clueless in whats going on when ive explained that it happens at a certain mph and while going down incline. The tech know that this has occurred when he taken the tacoma on a test run. Some how the tech think a reset of driver style handling is the issue. The tacoma isn' responding to a driver style handling reset. Ive scheduled another appointment with the dealer to have the tech check the tacoma again. There are other years of Tacoma's that have this problem. I believe this particular tacoma has the same issue as the other tacoma years that are under a torque converter recall.The symptoms are identical compared to other tacoma year models under the torque converter recalls.I don' want this problem to become a hazard where the tacoma cause a massive pile up in traffic because of the unstable mph at 40 mph.The 2015 tacoma doesn't keep steady speed limit at 40 mph going down incline. The rpm fluctuates at 40 mph as if its trying to distinguish what speed limit the engine is driving at. The tacoma is stalling at 40 mph while making a shutter sound while driving down inclines and winding turns.

NHTSA ID

11724425

Incident

Feb 9, 2026

Due to the failure of the secondary air pump system vehicle will experience a sudden loss of power and could cause a loss of control. Toyota is aware of the problem but will not issue a recall.

NHTSA ID

11497114

Incident

Dec 5, 2022

U JOINT BROKE WHILE DRIVING

NHTSA ID

11376155

Incident

Nov 16, 2020

Mileage

74,000 mi

SECONDARY AIR INJECTION SYSTEM (SAIS) - ONE WAY FLAPPER BELOW INJECTOR VALVE STICKS EITHER OPEN/CLOSED, THROWS OFF WHOLE SAIS AND SETS CAR IN LIMP MODE WITH CORRESPONDING CHECK ENGINE LIGHT CODE.

NHTSA ID

11364432

Incident

Oct 11, 2020

Mileage

61,000 mi

ON THREE DIFFERENT OCCASIONS I WAS STATIONARY WITH THE GEAR SHIFT IN DRIVE AND MY FOOT FIRMLY ON THE BREAK,WHEN THE RPM'S SUDDENLY REVEL UP TO OVER 5000 RPM AND THE TRUCK TRYING TO LURCH FORWARD. I HAD TO RAM THE GEAR SHIFT INTO NEUTRAL TO GET THE RPM'S TO DROP DOWN. THE LAST TIME IT HAPPENED AT THE BANK PARKING LOT. I CAME TO A COMPLETE STOP TO LET A WOMAN CROSS IN FRONT OF ME TO HER CAR. ALL OF THE SUDDEN THE ENGINE REVS WAY UP WITH ME TRYING TO HOLD THE TRUCK BACK AS IT WAS LURCHING FORWARD. SHE THOUGHT I WAS TRYING TO RUN OVER HER. I DON'T KNOW WHO WAS MORE SCARED, HER OR ME. I JAMMED IT INTO NEUTRAL AND AFTER A FEW MORE SECONDS THE REVS DROPPED DOWN TO IDLE AGAIN. I'M TAKING IT TO MODESTO TOYOTA TOMORROW TO GET IT LOOKED AT ON AUGUST THE 6TH. THE TRUCK ONLY HAS 63000 MILES ON IT. THE OTHER TWO TIMES IT HAPPENED WERE IN MY DRIVEWAY AND AT MY STORAGE UNIT. BOTH TIMES I WAS STATIONARY AS WELL, TRUCK IN DRIVE, FOOT ON BREAK. VERY DANGEROUS!

NHTSA ID

11343429

Incident

Jul 31, 2020

Mileage

63,000 mi

I PURCHASED THE VEHICLE NEW & HAD THE DEALER INSTALL THE OPTIONAL TOYOTA TRD SUPERCHARGER AT APPROXIMATELY 5K MILES. AT APPROXIMATELY 10K+ MILES, I STARTED TO NOTICE WHILE AT CRUISING SPEED (30-50MPH) IF I NEEDED RAPID ACCELERATION TO PASS OR ENTER THE HIGHWAY, THE TACHOMETER WOULD SHOW THE ENGINE REVVING BUT THE VEHICLE WILL NOT ACCELERATE. THE VEHICLE IS USED FOR COMMUTING 100 MI DAILY (HIGHWAY)THE TOYOTA DEALER CONFIRMED THE PROBLEM / REMOVED THE TRANSMISSION TO ACCESS THE CLUTCH & FOUND NO ABNORMAL WEAR OR DEFECT. TOYOTA NOW STATES BECAUSE I MODIFIED THE VEHICLE WITH THE TOYOTA OPTIONAL TRD DEALER INSTALLED SUPERCHARGER, THERE IS NO WARRANTY & I HAVE TO PAY FOR THE REPAIR. SEE THE FOLLOWING LINK: HTTP://WWW.TRDUSA.COM/PARTS-DETAIL.HTML?P=PTR29-35120&YEARS=2015&MODELS=TACOMA&CATEGORIES=ALL&SUBCATEGORIES=ALL : WARRANTY IS THE SAME AS OTHER TRD POWERTRAIN COMPONENTS: 12 MONTHS OR 12,000 MILES OR THE BALANCE OF THE 5 YEAR/60,000 NEW CAR POWERTRAIN WARRANTY, WHICHEVER IS GREATER, WHEN INSTALLED BY AN AUTHORIZED TOYOTA DEALER. SUPERCHARGERS INSTALLED BY ANYONE OTHER THAN AN AUTHORIZED TOYOTA DEALER ARE WARRANTED FOR 12 MONTHS OR 12,000 MILES. : THE DEALER FEELS THE OEM CLUTCH/PRESSURE PLATE IS NOT SUFFICIENT TO SUPPORT THE EXTRA POWER & REPLACING WITH NEW OEM PARTS WILL NOT RESOLVE THE ISSUE BUT UPGRADING TO HEAVY DUTY AFTERMARKET PARTS IS RECOMMENDED. THE VEHICLE WAS DRIVABLE BUT POTENTIALLY DANGEROUS WHEN RAPID ACCELERATION IS NEEDED. THE "RIGHT" THING FOR TOYOTA TO DO WOULD COVER 100% OF THE LABOR & 50% OF THE AFTERMARKET PART UPGRADE SINCE TOYOTA DOESN'T OFFER A TRD UPGRADE. IT SEEMS TOYOTA DENIES ALL CLAIMS RELATED TO REPAIRS AFTER A SUPERCHARGER INSTALL.

NHTSA ID

10958011

Incident

Feb 27, 2017

Mileage

16,000 mi

TRUCK IS ONLY A YEAR OLD AND MULTIPLE TIMES NOW THE TRANSMISSION HAS FAILED TO ENGAGE. EACH TIME IT'S IN DRIVE, AND ON A SLOPE OR HILL AND WHEN BRAKE PEDAL IS RELEASED WITH THE TRUCK IN DRIVE IT STARTS CLICKING AND GRINDING AND ROLLS BACKWARDS, UNABLE TO ENGAGE AND CONTINUE ON. TRUCK REQUIRES THAT YOU PUT IT INTO PARK AND BACK INTO DRIVE BEFORE YOU CAN PROCEED. LAST TIME THIS OCCURRED I NEARLY HIT A CHILD IN THE STREET AS IT ROLLED BACKWARDS AND WOULD NOT ENGAGE EVEN THOUGH IT WAS STILL IN DRIVE. IT'S BEEN INTO THE SHOP MULTIPLE TIMES NOW AND I AM TOLD THERE IS NOTHING THEY COULD DO AND I HAVE EMAILED TOYOTA. NOBODY WANTS TO HELP AND THIS ISSUE CONTINUES. THIS IS A SERIOUS SAFETY ISSUE WHEN TRANSMISSION WILL NOT ENGAGE AND STARTS ROLLING BACKWARD BEFORE YOU EVEN REALIZE WHAT IS HAPPENING OR HAVE A CHANCE TO REACT. EVEN IF THERE IS NO HILL-HOLDING OPTION WITH THIS TRANSMISSION, THE TRUCK SHOULD NOT CLICK AND GRIND IN GEAR ONCE YOU PUT FOOT ON THE GAS PEDAL TO ATTEMPT TO CONTINUE THE DRIVE FORWARD. THIS IS SERIOUS AND NEEDS INVESTIGATION!!!!!!!! THIS IS THE 2ND COMPLAINT WITH YOU AND THERE HAVE BEEN MULTIPLE ATTEMPTS TO WORK WITH TOYOTA TO NO AVAIL. DIFFERENT ANSWER EACH TIME I TAKE IT IN.

NHTSA ID

10928701

Incident

Nov 25, 2016

Mileage

600 mi

TRUCK IS ONLY A COUPLE MONTHS OLD AND MULTIPLE TIMES NOW THE TRANSMISSION HAS FAILED TO ENGAGE. EACH TIME IT'S IN DRIVE, AND ON A SLOP OR HILL AND WHEN BRAKE PEDAL IS RELEASED WITH THE TRUCK IN DRIVE IT STARTS CLICKING AND GRINDING AND ROLLS BACKWARDS, UNABLE TO ENGAGE AND CONTINUE ON. TRUCK REQUIRES THAT YOU PUT IT INTO PARK AND BACK INTO DRIVE BEFORE YOU CAN PROCEED. LAST TIME THIS OCCURED I NEARLY HIT A CHILD IN THE STREET AS IT ROLLED BACKWARDS AND WOULD NOT ENGAGE EVEN THOUGH IT WAS STILL IN DRIVE. IT'S BEEN INTO THE SHOP, NOTHING THEY COULD DO AND I HAVE EMAILED TOYOTA. NOBODY WANTS TO HELP AND THIS ISSUE CONTINUES. THIS IS A SERIOUS SAFETY ISSUE WHEN TRANSMISSION WILL NOT ENGAGE AND STARTS ROLLING BACKWARD BEFORE YOU EVEN REALIZE WHAT IS HAPPENING. EVEN IF THERE IS NO HILL-HOLDING OPTION WITH THIS TRANSMISSION, THE TRUCK SHOULD NOT CLICK AND GRIND IN GEAR ONCE YOU PUT FOOT ON THE GAS PEDAL TO ATTEMPT TO CONTINUE THE DRIVE FORWARD.

NHTSA ID

10790687

Incident

Aug 30, 2015

Mileage

800 mi

TL* THE CONTACT OWNS A 2015 TOYOTA TACOMA. WHILE DRIVING AT 15 MPH DURING COLD WEATHER, THE CLUTCH AND ACCELERATOR PEDALS WERE DEPRESSED BUT THE CLUTCH REMAINED DEPRESSED WHEN RELEASED. THE CONTACT STATED THAT AFTER SIX SECONDS, THE CLUTCH RELEASED INDEPENDENTLY AND THE REAR OF VEHICLE VEERED TO THE RIGHT. THE VEHICLE WAS TAKEN TO A DEALER. THE TECHNICIAN WAS UNABLE TO DIAGNOSE OR REPAIR THE VEHICLE. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 500. UPDATED 5/15/15*CN UPDATED 9/16/2015*JS

NHTSA ID

10701975

Incident

Jan 21, 2015

Mileage

500 mi