Transmission slips out of gear

KEVIN SCHANUEL SR.

MEMBER
1999 FORD F-150
4.2L
6 CYL
2WD
AUTOMATIC
245,000 MILES

I had the truck on ramps passenger side front and rear the other day to perform routine lubrication. Since then, the transmission is slipping, along with the speedometer reading erratically and the cruise not working.

I checked the wiring harness connector at the transmission and found a little fluid on the two wire connector.

The 'check engine light" is on and flashes sometimes.

Monday, September 11th, 2017 AT 11:51 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
54,144 POSTS

This sounds like you have a shaft speed sensor that is acting up or the transmission is low on fluid. We should run the codes to see what comes up it may lead us in the right direction so we can get the truck fixed.

Here are a couple of guides so you can get started:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let us know what you find.

Cheers, Ken

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Wednesday, March 24th, 2021 AT 10:06 AM