Skip the auto shop - Our mechanics make house calls

Q: Do u add tranmission fluid in when transmission hit light comes on

asked by on

Transmission hot idle engine indicator light on

My car has 150 miles.
My car has an automatic transmission.

A: Transmission fluid can be added when the en...

Transmission fluid can be added when the engine is hot as long as you check for proper transmission fluid level correctly.

  1. Position the vehicle on a flat surface
  2. Set the gear into "Park"
  3. Set the parking brake on
  4. Leave engine at idle
  5. Put on gloves and any other safety protection

    CAREFUL - things are pretty hot in here!

  6. Remove the transmission filler cap(round black cap with white lettering under the hood on the driver side of the vehicle - just behind the radiator.)

  7. Remove the dipstick to wipe with a clean cloth, re-insert and twist closed.

  8. Remove the cap and dipstick again and carefully observe where the "wet fluid level" comes to on the bottom of the dipstick.There will be a "Hot" mark, below which will be "x" marks, and a "Cold" mark.

  9. Add fluid (check your manual for the correct fluid type), to raise the fluid level to the "Hot" line. DO NOT OVERFILL.

If you are uncomfortable doing this, I would recommend a Safety Inspection from YourMechanic to check fluid levels, possible coolant level problems, an accurate assessment of any damage, and provide an estimate for repairs. YourMechanic.com can dispatch a mobile professional mechanic to your location for this repair. Contact YourMechanic.com to request this inspection and to schedule an appointment.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Steering wheel problem, hard to turn after stop.

Hi there, With 77,000 miles on your 2011 Buick Enclave, I wouldn't expect your issue to be mechanic in nature. In many cases, the problem's you're describing are caused by low power steering fluid, or if your power steering is...

Q: Locks don’t all work, might be electric problem

The door latch assembly has a lock actuator as part of it. The complete assembly, except for a couple internal pieces, is made of plastic and doesn't last as long as it used to when it was made of metal....

Q: Is my alternator bad or my cables?

Hello. If the vehicle is only working when the charger is installed then there is high resistance in the vehicles electrical system. Most of the time it is caused by a bad positive battery cable. I usually do a voltage...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.