My van will drop into 1st gear after driving it for about 15-20 mil,es if I let it sit for a few hours it is fine until another 15-20 miles at which time it will go back into 1st gear again. any answers to my problem. it has been doing this for a year.
An expert who has achieved level 2 by getting 100 points
An expert who has answered 20 questions.
An expert that has over 10 points.
An expert whose answer got voted for 2 times.
Re: van drops into 1st gear after 15 miles
What does the speedometer do when this happens? If it goes dead at the same time you need a Vehicle Speed Sensor which is mounted to the transmission. It tells the ECM what your speed is and without the input from the sensor, the computer assumes the van isn't going very fast and locks in 1st gear.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Assuming it is a 4L60E trans. The first thing to do is change the filter & replace the fluid. Have the shop check the fluid pressure. Other than that there are numerous things that could cause your problem. Could be the torque convertor on it's way out. P.S.There is no timing belt in a transmission.
Not knowing the size of the motor you have in the van,i would start looking at the timing belt or timing chain causing the 20 degree swing. If it is a 3.0 liter engine there maybe some wear on the distributor drive gear causing the problem. The only function the flywheel plays is in starting the engine from starter. Has no direct bearing on the timing. The only thing you would have with a distorted or cracked flywheel would be vibration during driving and starter problems (grinding noise starting) (complete lock up of starter if the teeth on flywheel did not line up with starter. Also the engine does not have to be removed from van to inspect the flywheel. The transaxle can be removed from van with the engine still setting in van to inspect the flywheel. If the van has over 60,000 miles on it then i would look at the timing chain or belt. Also on the slipping of the transaxle during the time it was drove i would say that the bands in transaxle need to be adjusted to correct the problem with the transaxle. Hope this will help you.
If my memory serves me right your van has a carburator. The stumble is in there. Take it to a reputable shop that specializes in rebuilding carbs and fuel systems. Time has taken its toll on yours but a good cleaning and rebuild should cure your stumble. Hope this helps.
Likely you have a shaft seal or clutch piston seal thats leaking only when the unit gets hot and clearances change. It will require teardown and careful inspection to determine exactly where, then replace worn parts and finish rebuild.
No it is a fail safe. When your oil pressure drops below (on most cars) 30 psi your computer will shut your fuel pump down until you either let it sit for a while and it resets or until oil pressure builds again. Sorry!
I'm having similar problem with mine, and I think it's possible I got some bad gas. Maybe from an old backwoods gas stationwith condensation in their tanks, or maybe condensation as mine hadbeen sitting for weeks at a time recently. I may try to completelydrain every bit of gas, and change the fuel filter, and throw some fueltreatment in when I put new gas in. Gonna check a few other thingsfirst, though.