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111 Posts
Discussion Starter #1
i have a 99 f250 7.3 auto and i ordered a TS 6 position and put on it... after installing the programmer took it up the road... done well for 15 or so minutes... then took a shift like it went into neutral and went back into gear... then acted like it was slipping real bad and went to the rev limiter... took the programmer to stock and now it dont want to shift without letting out of the throttle and allowing it to shift... my computer code is NVK2 the programmer had NVK4 on it... is it a trans issue you programmer issue or something else? thanks for any imput
 

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Former Ford Trans Engr.
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3,101 Posts
If it's back to stock and still doing it I think the trans broke.
 

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Former Ford Trans Engr.
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3,101 Posts
Yes, one of those two. Without tearing the trans down I can't tell you which one.
 
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