Skip the auto shop - Our mechanics make house calls

Q: Hard shifting, high revving

asked by on

I have some problems with the transmission. If I drive for more than an hour and a half, I get the hard knocking noise while shifting. When I shift from first into second gear, there would also be very high revving and RPMs would increase significantly. On one ocassion, I couldn't shift into second gear at all. There was only high revving. These issues occur only when I drive a bit longer. What could be wrong here?

A: Hello. It is possible that the transmission...

Hello. It is possible that the transmission is faulty and may need to be replaced for your 2007 Chevrolet Express 2500. It sounds like the transmission valve body is overheating and causing the shifting problem you are experiencing. The clutches may be worn out as well, which may also cause a problem with being able to shift properly.

There are several options available when replacing a transmission. The transmission you currently have can be rebuilt by a local transmission shop, you can get a used transmission from a junkyard, or you can buy a new transmission to be installed. However, buying a new transmission to be installed will be costly. If you want to have this checked before moving forward with any repairs, a certified technician from YourMechanic can come to your car’s location to diagnose your shifting issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

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: Can't shift bugger into neutral after a battery drain

Try putting in the key and only turning it to the first position before the key turns on and try to shift the shifter to neutral. If this does not work then you can open the hood and use a...

Q: Vibration in steering wheel at 70 mph

Hello. If the tires that are currently on the car are defective, this type of vibration may occur. It may be necessary to replace them. Other possible causes for the vibration may be a faulty tie rod, rack and pinion,...

Q: Several lights quit working

Hello. Thanks for writing in about your 2003 Chevrolet Express 2500. There should be a relay for the turn signals, flasher, and hazard lights. More than likely, this relay is faulty and would need to be replaced. It is also...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...