Why does my truck go in and out of overdrive?
If the transmission is coming out of overdrive and back into overdrive, either the downshift solenoid has an internal leak or there is an internal issue with the transmission overdrive clutch. If the rpm’s are not raising up as the vehicle is slowing down, then I recommend replacing the downshift solenoid.
Should you tow in overdrive?
Overdrive on causes more shifting of gears. When you drive your truck normally (OD on) and accelerate or go uphill you will notice the vehicle shifting gears. When towing, the weight of the trailer will cause this to happen more often. The frequent gear shifting when pulling weight is not good for the transmission.
What transmission does a 2001 GMC Sonoma have?
Used Transmission
| Year | 2001 |
|---|---|
| Model | Sonoma |
| Options | AT 4.3L 4×2 |
| Transmission Tag | 1MSD, 1HD, 24219068, 24219070 |
| Transmission Code | 4L60-E |
What does 4L60E transmission fit?
The 4L60-E is found in nearly every GM rear-wheel-drive application, including the C/K Truck, Sonoma, Jimmy, Tahoe, Yukon, Astro, Safari, Suburban, Bravada, Firebird, Camaro and Corvette.
How do I know if my 4L60E pump is bad?
5 Symptoms of a Failing Transmission Pump
- Pungent, Burning Odor. When your transmission pump has gone bad, the fluid will not be able to circulate in the transmission properly.
- More Challenging to Shift Gears.
- Illuminating Check Engine Light.
- Noisy Transmission.
- The Transmission Starts to Slip.
What are the signs of a bad transmission pump?
Signs of a failing transmission pump
- Noise: A failing transmission pump will often make a whining noise.
- Transmission slippage: Transmission fluid is used to change gears as you drive.
- Check engine light: An onboard computer monitors transmission operation.