03 navigator shakes/vibrates when pressing gas at high speeds - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

msrdude · 05-12-2011, 20:33

I have a 03 navigator and when I drive on the freeway like 65 + mph, let go of the gas then press on the gas to speed up, the bottom of the car shakes/vibrates. This happens most of the time and it does not happen when I press on the gas really slow. What do you think is the problem?

**Bert** · 05-12-2011, 21:15

Take it to Autozone and they'll pull codes for free. See what comes up.

msrdude · 05-12-2011, 23:18

The check engine light is not on though

**Bert** · 05-13-2011, 09:24

The light doesn't have to be on to have a code.

msrdude · 06-29-2011, 11:22

There is no codes. I asked my teacher at school, told him if it could be a transmission problem, or maybe a spark plug problem, and he said it may be the torque converter or something like that. Do you think so too?

**Bert** · 06-30-2011, 17:14

It's possible for that or other things. Without being able to experience it, I couldn't say what it is. How many miles on the spark plugs? Does it feel like it's missing?

msrdude · 07-01-2011, 11:22

Yea, it is the spark plugs. I drove home last night, and the car shook like crazy. I slowed down and the car was shaking and was about to shut off by itself. I could not get the car past 60 mph and it definitely sounded like it was misfiring.

msrdude · 03-14-2013, 20:10

Update:

This problem has been solved. No mechanics and the first time i took it into the Ford dealer could not figure out the problem. Second time i took it to the Ford dealer, they finally figured out that the transmission was going out. They dropped the tranny opened it, and it was fried. Ended up replacing a new transmission and cost almost 4 grand! Now, car drives smooth and no more jerking when pressing the gas pedal.

**Bert** · 03-15-2013, 09:02

Sorry to hear the cost but glad to hear that it's fixed.