Searching among gears
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Joined: Nov 2001
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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.
Senior Member
Joined: Sep 2000
Posts: 1,704
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From: Mpls, MN
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.
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.
Senior Member
Joined: Feb 2000
Posts: 1,544
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From: Kalamazoo, MI, USA
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?
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?