My 96 Ford Windstar transmission was rebuilt some time ago and it has
a surge/bucking feel in overdrive at about 1400-1600 rpm. I
have tried to
isolate whether this problem was electrical or
mechanical over the last few
months. The #4 fuel injector has been
changed along with a new set of plugwires
and double platinum plugs.
The engine has no noticeable miss at idle or
acceleration, but as the
transmission drops in to overdrive and rpm settles at
get severe bucking until you change the engine rpm - problem
disappears - then returns when idle drops back. I have tried driving
only(third) and although the rpm is higher, the problem
still returns. Any ideas
on whether this problem is
electrical/sensor/computer/or transmission related?
The trouble light
is not on and a buddy of mine checked for any codes and said
were none showing up. One suggestion was warpped plates in the torque
converter, any and all others appreciated.