The Ford Diesel Website - Transmission shift points on 4R100


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Transmission shift points on 4R100

Msg # 6 of 4192 on Power Stroke Conference '99-up (2)
To: All, From: Paul From Pa.
Time: Monday 02-08-99, 07:02 pm
I have a 99 350 PSD 4X4 auto.I don't like how the
transmission will shift into overdrive and the
convertor will lock up at around 50 MPH.If you are
behind a car and you cant accelerate you get caught
in this situation where the engine RPM's are around
1250.It's not to the point that the engine is
lugging but it is just not at an RPM where their is
any throttle response at all.I had a 95 Dodge
Diesel that did the same thing and I got the PCM
reprogrammed that changed the shift and converter
lock-up points to keep the RPM's out of this dead
zone.My question is does Ford have a PCM reprogram
or does the Banks Transcommand change the shift
points.I have read it gives you crisper shifts,but
I am unsure if it does change the shift and
converter lock-up point.

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