2000 Ford Excursion Shift Problem
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2000 Ford Excursion Shift Problem
I have a 00 Ex with the 6.8L that is having a problem, between 1750 and 2000 rpms it does not want to upshift with OD on, with OD off it upshifts fine. With th OD on it tries to shift, and vibrates, but I have to really give it gas for it to upshift.
It did not do this until it had developed a serious miss when driving, I replaced the coil packs and had some other work done, that cleared up the miss but the shift issue remains.
Vehicle is stock except for a factory tech valve body (installed about 10K ago, the fluid and filter was also changed at that time) and a Gibson exhaust.
No codes or CEL. Has been into a local shop and Ford, the best they could come up with was replacing the ECM, that was done at Ford and reflashed with the latest version of programming but the problem remains.
I was guessing perhaps a transmission sensor, shift solenoid or valve body issue? Anyone have ideas, as to at least where I should start?<O
</O
It did not do this until it had developed a serious miss when driving, I replaced the coil packs and had some other work done, that cleared up the miss but the shift issue remains.
Vehicle is stock except for a factory tech valve body (installed about 10K ago, the fluid and filter was also changed at that time) and a Gibson exhaust.
No codes or CEL. Has been into a local shop and Ford, the best they could come up with was replacing the ECM, that was done at Ford and reflashed with the latest version of programming but the problem remains.
I was guessing perhaps a transmission sensor, shift solenoid or valve body issue? Anyone have ideas, as to at least where I should start?<O
</O
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
Likes: 2,669
From: SE Florida
My first guess is the aftermarket parts, i.e., the valve body. Either there's a problem with it or it wasn't installed correctly.
A good scan tool that can read transmission data would help diagnose this.
A good scan tool that can read transmission data would help diagnose this.
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