Auto Transmission Question
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Auto Transmission Question
I'm thinking about buying a 97 F250 4x4 with an automatic transmission. Really nice truck, clean, 21K miles. When I test drove it, and put it in 4WD, it seemed to be grabbing the pavement, then falling out of gear, grabbing the pavement, then falling out of gear. It was very subtle, it just seemed to bite, then release. The salesman said this is normal,it was just realizing it had traction, then trying again. I wonder if this is normal. I have have 4WD trucks before but never with an automatic. Comments, Anyone?
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Joined: Dec 2000
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Auto Transmission Question
Sounds normal to me. Mine does this too on dry pavement especially when you turn and move. The front wheels are trying to pull and the differential cant compensate for the different speeds of the two front wheels when turning as well. if they were straight all the time like the rear you wouldnt notice it as much(Wheels).
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Joined: Jan 2002
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Auto Transmission Question
did this truck have auto locking hubs?are you sure about buying the auto i'm really disappointed with my auto.i have manual hubs and it will jump some on dry road if it's all locked in and in 4x4 but only if i'm turning do i really notice this & i don't make a habit of it
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Joined: Dec 2001
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From: Plano, Texas
Auto Transmission Question
Be careful! If you turn the truck hard on dry pavement, while in 4wd with a part-time system like these trucks use, you can break things in fairly short order....
The transfer case of a part-time 4wd system will ALWAYS turn the front and rear driveshafts at the same speed, but in turns, the front wheels will always describe a longer distance than the rears, thus placing very high torque stresses throughout the drivetrain. The only ways the torque stresses are relieved are 1) stop doing it, 2) tire skip, or 3) something breaks.
Both the front axle and the rear axle have differentials, but the transfer case does not.
Be careful out there...
Tony.
'99250LD supercab, 5.4, auto.
1,200 watt 4-spkr, 2-sub.
The transfer case of a part-time 4wd system will ALWAYS turn the front and rear driveshafts at the same speed, but in turns, the front wheels will always describe a longer distance than the rears, thus placing very high torque stresses throughout the drivetrain. The only ways the torque stresses are relieved are 1) stop doing it, 2) tire skip, or 3) something breaks.
Both the front axle and the rear axle have differentials, but the transfer case does not.
Be careful out there...
Tony.
'99250LD supercab, 5.4, auto.
1,200 watt 4-spkr, 2-sub.
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