Q: Late upshift when engine is cold

asked by on

Late upshift from 1st to 2nd gear in the morning when engine is cold, but if engine warmed up for 3 or more minutes before driving, no late upshift, runs normal, even after fluid had been replaced.

My car has 128500 miles.
My car has an automatic transmission.

Many newer automatic transmissions have temperature-sensors in them that, on a stone-cold start, restrict normal shift to only the lower (or non-overdrive gears) until the engine coolant and transmission fluid reach a certain level which in many engines, is around 140 degrees. At that point, engineers generally consider an engine or transmission fully warm for fluid-circulation and engine-stress purposes (this is usually at the lower end of the normal range on an analog temperature-gauge, or when the blue cold-engine light goes off). In some cases, this temperature sensor may fail resulting in delayed shifting or erratic shifting. I would suggest having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Late upshift when engine is cold

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Brake system issues

It sounds like you may have a brake caliper sticking which could be dangerous. The pads should be close to the rotors when the brakes are disengaged, but not making enough contact to squeal or drag. You should have this...

Q: Why is my dashboard cracked in so many places?

Hi! Thank you for writing in with this question. This is a common issue for multiple Toyota vehicles of that vintage. Toyota released a Technical Service Bulletin (TSB 0039-15) for this concern in June 2015. The specific coverage is based...

Q: Transmission slipping and rough shifting - 1990 Toyota Cressida

Hello, thanks for writing in about your 1990 Toyota Cressida. The transmission is most likely the issue in this case. The fluid level and condition need to be checked. If the fluid level is extremely dark or exhibits a burnt...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.