Help getting T56 into revers!

[John S]

I've got things coming together and I installed the driveshaft today and decided to try and move the car under its own power. I was not able to get the tranny into reverse while the engine was running. I do have a reverse lockout wired and it is functioning correctly. I do not get any grinding at all it just seems like the shifter hits a wall when I try to get it into reverse.

If I shut the engine down, slip it into reverse then start it up everything seems to be fine.
I have no problem getting into 1st or 2nd and the clutch seems to be engaging and disengaging just fine.

When I get it into reverse and start the engine it does seem like the engine drags just a little but the car does not try to move. One running and in reverse the clutch engages and releases fine.

Can anyone offer some insight or help?
Thanks