Q: 4l60e transmission shifting problem

asked by on

Hey so when I try to switch from 1-2 it won't shift into 2nd on its own. I have to give it higher rpm completely let off gas then slightly hit the gas then it will go into 2nd. But it's getting worse where it's barely wanting to shift into 2nd now. Also I have no 4th gear or OD. Would this be a mechanical or electrical issue. I'm hoping it's something I can fix. Thanks for reading this, appreciate your feedback.

My car has 100000 miles.
My car has an automatic transmission.

The 1-2 shift failure on the 4L60E is often due to a faulty throttle position sensor (TPS). Test the sensor (there should be a smooth, linear electrical response over the range of motion) or substitute a known good unit. A more serious cause of 1-2 shift failure on the 4L60E is a leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). You can test for this by using an external pressure gauge. If you see a big drop in pressure when the PCM commands 2nd gear, there is a leak. It is also possible to have inadequate line pressure due to a leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or possibly leaky seals throughout the transmission. The problem with the overdrive and no 4th gear is probably mechanical in nature but would require further diagnosis. Often, no 4th gear is accompanied by noise (due to hard parts failure) and/or 1st or 3rd won’t work either. The transmission you have is very common, parts are very readily available, and is easily rebuildable so you needn’t worry. If you can’t repair it on the car, just rebuild it. If you want a conclusive diagnostic performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a transmission shift diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. 4l60e transmission shifting problem

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: Leaving stop light car runs high rpms 5000-6000 and doesn't want to go over 20 mph 2009 Chevy Traverse

Hi there - first thing to check is the transmission fluid level - low fluid levels can cause lots of problems like this - your transmission is obviously slipping badly. If the fluid is at a correct level, and doesn't...

Q: car studders during acceleration only between 20-30mph

Audi may not be too far off. Fuel doesn't have much of a shelf life. When left in the tank it tends to lose its volatility and deposit a varnish like sludge on any components in the tank. This could...

Q: Q: My truck will not start at all!

Hi there. It looks as if you had a lot of work done in a very short period of time. This might have led to a minor mistake that could have prematurely drained your battery. In some cases, the battery...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...