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1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion

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Old Wed, September 1st, 2021, 07:53 PM
Whopper Junior
Join Date: Sep 2021
Posts: 1
THE FISH BAIT is on a distinguished road
Default 4R100 issue after rebuild

Fresh rebuild and upgrade on my 4r100 now the trans is flaring 300rpm right before shifting into 4th with my hydra installed. Box code is NVK3, i'm using the VRAA6S3 files. It happens in all of the tunes from 25hp tow to 120hp race. The trans guy drove the truck with out the chip and claims that he isn't seeing any issues with the trans. All of the other gears shift good. I'm open to any suggestions yall might have.
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