Q: SUV, GMC Envoy, 2004, vehicle has no get up and go! Not shifting into gear! Already changed transmission fluid and spark plugs!

asked by on

Engine or transmission has no get up and go! We changed the plugs and transmission fluid but it's acting like it doesn't want to get higher than 40mph! It's sluggish and it fights to get into gear. All the while the rpms, rise to 4, then finally connects into gear!

My car has 137000 miles.
My car has an automatic transmission.

If engine speed increases steadily in response to accelerator inputs, then this is probably a transmission related fault. To give you a precise slate of possibilities though I would need to know exactly which gears (which "shift points") are "missing" and/or experiencing delayed shifting. Generally, there are electrical causes of what you describe plus lots of mechanical possibilities. These range from a vehicle speed sensor in the transmission, line pressure sensor, valve body or shift solenoid fault, hydraulic circuit/clutch pack fault and so forth. Sometimes a faulty throttle position sensor will cause these symptoms. There can also be multiple causes of course. An advanced automotive scanner is typically used to read transmission operating data and that aids in the diagnostic. If you want such a diagnostic, please request service using YourMechanic’s loss of power inspection/diagnostic service request page and the responding certified mechanic will get this resolved for you, right at your location. 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. SUV, GMC Envoy, 2004, vehicle has no get up and go! Not shifting into gear! Already changed transmission fluid and spark plugs!

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: PO304

Hello, thank you for writing in. Between the tests you have done, and the diagnostic code for a misfire on cylinder 4, you may have an issue with the ignition system. You will want to check the ignition wire, the...

Q: Leaking transmission fluid - 2004 Ford Crown Victoria

Hi and thank you for contacting YourMechanic. There are 3 places for transmission leaks to go - externally to the ground, through the module vacuum tube, and into the coolant system through you transmission cooling lines. Since there is...

Q: I had new tires put on my car about 1 1/2 years ago and my two rear tires are showing the treads on the inside, is normal for them

To determine whether you have gotten reasonable service life out of the tires requires data on: 1) elapsed mileage; 2) the tire's treadwear rating; 3) operating conditions (inflation, alignment, speed, and ambient temperature); and 4) the possibility of product defect...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...