It does not wonder in and out of overdrive anymore. But even after adjusting the tv cable the shifts are still not firm

 

Lift the little latch on the TV cable adjuster. Shove that SOB all the way forward and lock it down. If it dont back second gear after that then you need to go back to the place you bought it from.

My own truck has major **** done to the tranny and when it hits 2nd in 4x4 it about lifts and steers itself...