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Old 02-05-2002, 12:35 PM
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Join Date: Nov 2001
Vehicle: 1999 Ford F150
Posts: 16
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Searching among gears
I purchased a 99XLT with automatic trans, 4.6 and 40000 miles. It is my first automatic truck. I notice the transmission is constantly searching for the correct gear at about 50 mph. Is this Normal? I really don't have any basis for comparison. Above or below 50 there is not problem, and I am not sure this is a problem.

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Old 02-07-2002, 07:53 AM
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Join Date: Sep 2000
Location: Mpls, MN
Vehicle: 1997 Ford F-150
Posts: 1,704
Depends whether or not it's in Overdrive.
Changing the transmission fluid may help but it's likely that it's simply going in and out of overdrive.

50 MPH is a normal shift point depending on load. If you are on a flat road it should go into O/D at about 50 MPH but if you step on the gas or reach an incline, the engine doesn't produce enough torque at such a low RPM so the transmission downshifts.
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Old 02-07-2002, 10:15 PM
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Join Date: Feb 2000
Location: Kalamazoo, MI, USA
Vehicle: 2000 Ford F-150 7700 4x4
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You didn't give enough info.

What was your load?

Were you accelerating?

Uphill? Downhill?

Rolling hills?

Altitude high?

Rear Axle ratio (3.3?)

Big Tires?

Towing a trailer or pulling a kite?
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