My 2003 Windstar has had problems with erratic shifting to a lower gear then back. I was told it was the Torque Converter slipping and i just had it replaced when it finally would not go into gear. Unfortunately the downshifting problem has reemerged only 2 weks after the Torque converter was replaced. Any ideas?
There is a switch on the trans that goes to your computer to let it know what gear you are in. It can go bad and cause these probs. You may have to replace it.
SOURCE: catalytic converter replacement
Good day
please disregard my last post. The only thing that came up was " the driver side catalytic converter on my 2003 ford expedition" so I was trying to fine out what you were asking, then I came across this full one.
Cheers
SOURCE: 1999 Ford Crown Vic transmission problems
check u joints and drive shaft for weights hope this works
SOURCE: how come the 1998 ford windstar 4 speed trans wont shift out of 2
HI !!! there usully one problem w/ this when thoesnt shfti right from firs to the second also takes more time is the Solenoid Pack in Rey. have computer tested and it wil tell you which has to be changr all this work inside the trnsmsion
SOURCE: escape will not go above 60mph and will not downshift w/gas pedal
It could very well be a restriction in the exhaust like a stopped up cat converter. I doubt if it is a torque converter,that may make it slow to get to speed but shouldn't effect hwy speeds.
You can check this vehicle for an exhaust restriction very easy by going to the DPFE sensor and measuring exhaust back pressure with a vacuum/pressure gage. It will be either silver or black in color will have 2 rubber hoses hooked to it going down to metal tubes that hook into the exhaust.It will have a 3 wire connector with the color of the wires being BN/WH,BN/LG,OG. Disconnect one of the rubber hoses from the sensor and hook the vacuum/pressure gage into the hose.You should have less than 1 psi at idle,then press accel to wide open throttle and take a reading,it should be no higher than 3-4 psi. Anything more is an exhaust restriction.
SOURCE: Transmission Leak. Torque Converter Front Seal?
I know that GM dosen't have a fill/check tube on several models. They use a plug on the side of the unit (like on stickshift transmissions) I'm sure there would be a similar item on your transmission otherwise after a rebuild, there would be no way to refill it. If it's a small leak you could try using a good sealer/conditioner such as Lucas, which may help you a lot.
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