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: abs light on brake line broke have been replace I bleed brake line but brake pad still go to the floor now wheels lock up

Hello. If the brake pedal is going to the floor then that means that it is not building pressure. If the brake system has been fully bled and there is no air in it then most of the time it...

Q: OBD support

Hey there. If you have the OBD-2 connector under the dash directly under the steering column, then the ELM327 will work to scan the vehicle after you download the app. I can tell you that this adapter is very cheaply...

Q: no check engine light on, but code reader shows Poo1 code, is this a problem

The code P001 is not a good code for your vehicle and it should be cleared. Your fuel mileage of 14.8 may be due to the hot summer weather. Different fuels are made in the summer and they may change...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.