Transmission jerk?

AL982289

MEMBER
2008 MERCURY SABLE
3.5L
6 CYL
FWD
AUTOMATIC
94,000 MILES

I have had this car now for over 2 years and every since I have had the car there has been this problem of a jerk in the transmission. This problem is an intermittent one that does not occur every single time. The problem comes and goes. There has been no check engine light and when I run a diagnostic scan with my code scanner I get no codes. The only codes that have ever showed up has been a 0720 I believe. Whenever I have taken the car to a shop they have never been able to pinpoint the problem. There has been talk of replacing the output sensor in the transaxle and that would run some expense. This jerking usually occurs at lower speeds and like I said it comes and goes. I dont know of anything else I can do. The car has been tuned up and runs fine except for the problem that occurs in the transmission. Any ideas as to what it could be? Should I replace the sensor?

5 Replies

RACEFAN966

MECHANIC
5,029 POSTS

If you are getting the P0720 code then you should replace the output speed sensor as it says it is bad. It is shorted or damaged in some way.

Was this

answer

helpful?

Yes

No

Wednesday, May 27th, 2015 AT 7:44 AM

EMYMEGS

MEMBER
2 POSTS
2001 MERCURY SABLE

2001 Mercury Sable 165k miles

I'm thinking there is some sort of problem with the transmission. When the car is idling, it will tend to jolt or jerk every so often. It also does that accelerating like it is having problems shifting. Is it likely the transmisison will need replaced entirely, or are there several other things that could be causing problems?