AOD has no overdrive

So I bought another Fox yesterday and on the drive home (all highway) I was thinking the car had a tall rear gear but after hitting the back roads I realized it wasnt going into 4th. Checked the TV cable and its neutral, no slack and no tension. Car shifts gears around 4800 but it does changes kinda firm. I could just be used to 4R70Ws though.
Anyway, today when cold the car suprised me by going into 4th for the first few miles of my drive. Didnt slip and engauged solidly. I rolled on a few times to downshift and it went into third great and then back into OD when off the gas and cruising.
Accelerating out of a corner it downshifted and wouldnt go into OD again.


I am thinking 3-4 shift valve. Am I on the right track?

I assume that would require VB being pulled and cleaning that valve?

I bought this Fox to fix some issues, clean it up and resell. Unfortunatly the trans issue will take a big hit off the cars value. Id say a good $800-$1000. Too bad I am so tapped right now cause there are a couple AODs in good shape near me for $250-$300.


I figured if the band was worn that the trans would slip when in 4th and also that if I did the 1D1 shuffle the car wouldnt engine brake in second. It does engine brake and when 4th works it dont slip.