Q: Erattic shiftingworking

asked by on

transmission replaced because of erratic shifting, now auto still shifts erratic. whats the problem?

My car has 150000 miles.
My car has an automatic transmission.

Erratic shifting can be caused by a number of issues. Without knowing the specific vehicle, I can list a few potential issues. If the transmission is vacuum controlled, things like weak vacuum to the shift modulator can cause erratic shifting as can a faulty vacuum modulator itself. If the transmission is electronically controlled, the transmission control module can be faulty. You may want to return the vehicle to whomever replaced the transmission to further look into the issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Erattic shiftingworking

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: Where is the tps on my 1992 Isuzu truck? 2.3 4 cyl. Standard transmission

The TPS is mounted on the throttle body inline with the throttle shaft. It will have a three wire connection. Feel free to contact a certified technician, such as one from YourMechanic, if you need some assistance with the replacement...

Q: Steering wheel will not turn when at a stop or slow speed. 2002 Acura MDX

Hi there - the lack of power steering assist, and squealing noise you here when using the steering at low speeds is indicative of poor power steering pump performance. First thing to check to check is the power steering fluid...

Q: Coolant leak - 2002 GMC Envoy

Hello. If the coolant leak is coming from a location near the cooling fan, this may suggest your water pump may be leaking. A common place for this to happen is from the water pump shaft as there is a...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...