37,000 miles on car, no increase in rpms, only "slips" for about 1 second.
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2007 Mercury Grand Marquis Question: Between 55-70 mph only, feels like transmission slips.
Answer #1G. T. Service Center (4056 Answers) , Stephenville, TX - (254) 638-3236ProfessorG January 27, 2014, 15:34Master
There is a history of front pump failures on those, hope it's not yours.
pushrod January 27, 2014, 16:09Master
If it were slipping rpm would increase, even for that 1 second! Scanner can actually display data to show slippage. Have it tested.