I have a 2003 Mercury Marquis and it shuddersat around 30 to 40 mph and noticing now at higher speeds, also seems like it he shifting hesitates or is not accurate.

Asked by Apr 26, 2015 at 11:01 PM about the 2003 Mercury Grand Marquis LS Premium

Question type: General

2 Answers

86,545

When was the tranny serviced last? Sounds like the solenoids are getting sticky, might try servicing the trans and add in a quart of TransX then fill to specs and see if that helps, if it does it will only be temporary, the real problem will return in time.

2 out of 2 people think this is helpful.

Thanks for the reply, will have serviced right away, just purchased vehicle.

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