Mechanics

WHAT WOULD YOU RECOMEND FOR A TRANSMISSION THAT SHIFTS ERRATICALY WHEN PULLING A TRAILER?

2009 Ford F-150 • 30,000 miles

2009 Ford F150 with 5.4 Litre V8 - When I pull my 7500 lb travel trailer the transmission will downshift on a flat road at highway speed for no apparent reason. It only started happeneing the third season of use. The dealership gets no error codes on the diagnostic but during a test drive agree there is a problem. The transimission has been re-calibrated 3 times.
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Murray Clark
February 22, 2012.



You have an internal issue possibly with the valve body. You need a trans shop to check it for you and verify the failure.

Roy

ASEMaster6371
Feb 22, 2012.