Alright i’m to my ends of this trans issue. She’s a 2001, whenever your at wide open throttle the truck just doesn’t shift from 2-3, it’ll sit there and hang in 2nd till you let off the throttle a little bit then it shifts. it’s gotten worse and worse. I thought it was physical problem, so i bought a core and build a new trans. well… same issue. i’ve changed all speed sensors out thinking that might be it, brand new NSBW, internal wiring harness on the valve body, fuel filter head along with fuel filter, and both lift pump filters, does this in all tune settings 1-5 as well as stock files. Also would like to add that I used a different valve body which is why i don’t believe valves are sticking. If anybody has anything thoughts It would be very much appreciated!
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