Working on my 48 Chevy 6.5 project, and am trying to use a (supposedly good) used 700R4.

In trying to test the trans, I get no engagement when I put it in gear-forward or reverse. I only hear a slight whine from the trans.

It seems the pump isn't pumping-I checked the oil cooler lines and no flow. I serviced the trans before I installed it in the car, it looked good, with no metal and no evidence of burning. I also drained the TC as much as I could.

The trans did sit for quite a while before I bought it-could something be stuck? I pulled the pan again tonight, with nothing obviously wrong, It seems to have plenty of fluid, although it didn't take much to show on the dipstick, about 5 qts, especially since I drained the TC.

Short of pulling the trans, is there something else I can check first?

Thanks. Joe.