Transmission

Asked by Jan 19, 2010 at 05:13 AM about the 2001 Chevrolet S-10 2 Dr LS Standard Cab LB

Question type: Maintenance & Repair

Son has a 2001 s-10.It has the 4cyl engine with automatic tranny.On the road it will run great then suddenly drop
out of overdrive and downshift.The only way to get this back in overdrive is to stop, and start all over again from the
start.The fluid is full and clean.Any suggestions?

2 Answers

180

Put a code reader on it. It might be the speed sensor but it would be worth your money to know before buying one and that not being the problem. The sensors range from $20 to $85.

5

Determine if the vehicle is equipped with a MAF sensor. If the MAF sensor elements are coated with contaminents, such as oil and/or dirt, then the Powertrain Control Module (PCM) will not receive correct airflow/load input from the MAF sensor. This usually causes a lean air/fuel condition but also is known to cause lower than expected transmission line pressure. Most of the time, cleaning the sensor elements with a cotton swab and electrical contact or MAF cleaner will fix the incorrect MAF signal and allow transmission line pressure to return to normal. GM has a bulletin, #04-07-30-013B, related to this condition, but refers only to aftermarket air filters as the cause. Have confirmed many vehicles with an OEM air filter that have this condition.

Your Answer

Chevrolet S-10 Experts

  • #1
    Andrew Olsen
    Reputation
    2,770
  • #2
    John Saffrahn
    Reputation
    1,100
  • #3
    Trebor66
    Reputation
    1,080
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,739 Great Deals out of 149,036 listings starting at $828
Used Ford Ranger
118 Great Deals out of 4,550 listings starting at $1,195
Used GMC Sonoma
3 Great Deals out of 285 listings starting at $2,150
Used Toyota Tacoma
405 Great Deals out of 44,409 listings starting at $1,995
Used Ford F-150
2,283 Great Deals out of 215,017 listings starting at $1,300
Used Dodge Dakota
72 Great Deals out of 3,018 listings starting at $1,595
Used Nissan Frontier
286 Great Deals out of 24,561 listings starting at $1,550
Used GMC Sierra 1500
695 Great Deals out of 58,595 listings starting at $1,995
Used Chevrolet Blazer
4 Great Deals out of 705 listings starting at $900
Used Dodge Ram 1500
309 Great Deals out of 9,446 listings starting at $1,750
Used Chevrolet Camaro
241 Great Deals out of 28,692 listings starting at $1,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.