My 99 Windstar was recently repaired for an intake leak. Following the
repair the van shifts into 3rd gear lockup at low speed and fails to drop
a gear even if a hill is encountered. Revs can drop to 1000 rpm without a
shift. On the hi-way, the overdrive engaes at 40 mph (70 kph) and will not
downshift easily. Blipping the brake pedal or stomping the throttle will
disengage the lockup or overdrive. Dealer suggests that we're not using
the throttle correctly, but they were able to reproduce the problem
one-time. However, they have not been able to diagnose anything.
Suggestions or comments welcome!