"AFMAN72" wrote:
>I bought a 98 F-150 last year. It runs great/drives great but when I
>use
>4-wheel drive and attempt to make a tight turn it seems to put a
>noticable
>strain on the trransmission. The truck has a 5-speed transmission
and
>I
>really have to give it more gas to make the tight turn. I have and
>Explorer
>4X4 too and don’t notice any problems making tight turns in 4X4
>mode. Any
>ideas on what might be wrong? thanks Phil
The Ujoints used in in that type of axles and all striaght axles at
that, are not constant velocity and they will bind more the sharper
you turn the wheel because the joint is trying to speed the wheel up
and slow it down twice with each revolution. The result is tightness
and a binding feeling as well as some steering wheel whip too. It is
also compounded by the fact the the rolling radius for front axle is
more then rear tires since they take a wider arc in turns. A truck
with true IFS (like GM’s) have true CV’s in the front axle and they
bind and lot less and steering wheel "whip back" is non existant
too.
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