Now that the old girl is running I took her out for a test drive down the driveway and back.

The brakes are not plumbed to the wheels yet so this was a short test drive.

Tonight I was going to work on plumbing the rear brake lines so I jacked up the rear axle and set it on stands.

Next, I thought to put it into gear so the wheels wouldn't turn.

Much to my suprise they still turned.

I had driven it down the driveway this past weekend with no issues.

So I removed the stands and lowered it back to the ground, still in gear.

Pushed on the truck and they wheels did not turn as the tranny engaged them

So I am wondering why the rear axle will turn freely while in gear and jacked off the ground and why when it is sitting on the ground it won't turn.

Perhaps I am just stupid but this makes no sense to me.

And no it is not because the driveline (torque tube) fell out of the U joint. The rear axle was jacked up not the frame.