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Not a Diesel Tech,,,,, Transmission and TC rebuilt Jan 2001, rebuilder was recommended by a friend (I think he is in jail now, unable to locate). Issues after rebuild, (I learn hard I know). I took my truck to Texas Performance Diesel in Emory TX, (great people) they worked on Electronic Issues and corrected, since then all has been fine until recently.

As the weather cools, truck shifting hard when cold. First thing on start up it does not want to "engage" when shifted to drive, first dozen or so shifts very hard and some what funky. After a very short time runs and shifts as smooth as ever. I've removed the programer and this does not seem to make a difference. Changed the external filter and running fresh Transynd flulid.

I feel this is something that could be electronic in nature, any idea?
 
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