I have a 1982 300 TDT. The cruise control is all electronic, not
I have replaced the control unit with a modern rebuilt unit and the
actuator with a new VDO actuator (servo). It has about 25-30 thousand
miles on it.
The cruise has started jerking when the car is going down a gradual
grade. On steep downhill sections the cruise works fine, and on level
or uphill stretches the cruise works fine, but on gradual downhill it
gives too much boost, then cuts out, then too much, then cuts out,
My speedometer cable is new and runs smoothly.
Does anyone have any ideas about what the problem is? I am pretty
sure it is linkage or actuator related. I don't want to spend another
$290 for a replacement servo if I can avoid it.