Re: Ford freestar having cruise control and transmission...
Has the cruise shut off switch on the master cylinder been checked or replaced yet? This is a big cause for cruise control issues on Fords. Very simple, only need a wrench. Do recomend placing a small container underneath to catch the small amount of brake fluid that will leak though. I have had the cruise 'fail' on two Ford vans, in both cases it was this sensor.
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cruise controls are controlled by the following switches and sensors
1 the switch itself
2-- the clutch pedal sensor or the VSS in the auto transmission
3 the brake sensor ---4-- the gear change switch or selector
5-- the engine speed sensor ( tacho)
6-- the road speed (VSS )
if 1 or a combination is not working or is outside parameters , the cruise control will not switch on
the road speed in a manual is set at around 20 mph and any less will not engage cruise control(CC)
changing gears in a manual will disengage CC
touching the clutch pedal will not allow engagement or will disengage CC
for some sensors run the fault codes
call the dealer, there prone to transmission failure. The 2006 Ford Freestar has 276 problems & defects reported by Freestar owners . The worst complaints are transmission, Good-Day! Is the transmission fluid ok!
I've seen this twice, once on my van and once on a friends car and both had to do with the brake switch or switch wiring. The brake switch is used to disengage the cruise control and if the switch is activated you won't get the cruise control function. You may see the CC light come on very briefly and go right off again in the switch situation as mine did, which came on the heals of the dealership working behind the dash. If I remember correctly a wire was broken on the brake switch connector. It could also be a maladjusted switch. Another area to consider is a correct speed sensor reading which tells the CC that you are at a minimum speed for engaging the CC. Beyond that it can get complicated if it's not a fuse or linkage connection issue.
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
engine and the automatic transmission (transmission control is
only for automatics, engine is still computer controlled no matter
the transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM or ECM,ECU), which is very rarely the
problem. Other basic checks must be done as well such as mechanical
problems with the engine as well as engine state of tune and mileage
on the engine. The transmission can have mechanical issues as well
such as no gear engagement at all or a failed pump or other pressure
related problems. Also engine mechanical problems can and do cause
many drive-ability related problem such as rough idle and other
This is a recall just like the 2005 Freestars. Your Freestar more and likely has a defective torque converter and worn out splines in your transmission. This is a life threatening recall and Ford inc has been looking at it as a casual recall. Get this to your Ford dealer today and have them fix it at no charge to you. Problem solved.
I had the same problem and apparently fixed it by mistake. I replaced the cruise control deactivation switch under the master cylinder, hoping the cruise would be fixed. Some how with that the "trac off" light went out and gave me the ability to turn it on/off from the button again. The part was $30 from the local dealer and easy to replace. Before you run out to replace the switch check the connections on the old one. It plugs in upside down which may accumulate water from puddles and things causing connection issues ( a known problem ).