Q: Rough shift from 1st to 2nd.

asked by on

I have a 2002 silverado1500 5.3l automatic with 233,000 miles. Whenever it shifts from 1st to second it jerks in the rear wheels. As if the tires grab the road and spin at around at speeds of 20mph. Very annoying and confused of why it is doing this.

My car has 233000 miles.
My car has an automatic transmission.

Transmission problems can be confounding mostly because the components are so inaccessible and there are so many of them. Although the transmission is generally thought to be the most complex "component" in a motor vehicle, in principle, it actually is pretty simple. In the transmission, sensors measuring speed and engine load actuate "shift change solenoids" and other valves (all in a large valve body bolted into the transmission) which redirect high pressure hydraulic fluid to pistons that force clutches to actuate.

First thing to check is the fluid level. If the fluid level is not correct (high or low), the hydraulics will not preform properly. If the fluid hasn’t been replaced, there is a small chance that merely changing the fluid and the filter could improve the situation. If the filter is clogged, hydraulic pressures will be insufficient and can lead to delayed shifts. If fluid isn’t the issue, it’s likely that problem is the valve body (a faulty solenoid or a sticky valve), a damaged o-ring hydraulic seal in the transmission, or damaged piston.

In this case, rebuilding the transmission can possibly result in a better unit than what was originally supplied in the vehicle for the simple reason that since 2002, the parts like accumulators and valve body parts, have been re-engineered to solve all the known issues that have since been observed in the field. Before seeking out mechanic specialists to rebuild the transmission, I recommend having the vehicle diagnosed because a full transmission rebuild may not be necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Rough shift from 1st to 2nd.

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: My car isn't accelerating when I put in in drive and press the gas pedal.

Hi there. Check the brakes on your vehicle to see if they may be locked. Check the parking brake and make sure that its released. Visually look at around the brakes for anything out of the ordinary. If the brakes...

Q: Grinding coming from tail shaft area of transmission while releasing the gas pedal traveling 25 miles per hour

Hi there. The grinding sound may be coming from a rear output shaft. In most cases, the transmission yoke or output shaft will wear out over time, or when the inner seal has broken. The grinding is typically due to...

Q: What years ignition module will fit my 1991 Chevrolet Silverado 5.7

Hi - GM V8 ignition control modules from 1987 to 1995 should interchange with your '91 5.7L. For assistance, I recommend a ignition control module replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come...

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...
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...