Trans turns driveshaft in N not in Park 4L80E

[Ole Greenie]

Hi y'all,

I'm kind of stumped about an issue I have. Just converted the 68 to an LQ4 with a 4L80E trans from a 2500HD. The funny thing is that while I'm in neutral, the wheels still want to spin/ it still places torque on the driveshaft.

To the best of my knowledge, I'm sure I keyed/adjusted the selector correctly to the transmission. I haven't driven it much because I'm just completing the build but I'm stumped.

Any ideas?

John