Help Trans

[Vitucc]

So I take my 02 Excursion 7.3 to the tranny shop to have the transmission rebuilt. They put in th transgo tugger kit, and a triple disc converter 1600 rpm. Now the transmission wont shift. They say they codes 781,782 , the truck has been in the shop for 2 weeks and they cant figure it out. This is a very reputable shop. They changed the shift solenoids and still nothing ??? Has anyone gone through this ? or any advice i can pass on to them I want my truck back.

Thanks,
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