I have a 77 Highboy wth a 460, C6 and a 203 transfer case.

I unlocked the front wheel hubs on it after I worked on it in the garage. I started it up and put it in gear and it wouldn't move, forward or reverse. I have the tunnel cover off and I could see all of the driveshafts turning except for the very rear one. I can see it and it wasn't turning.

The tranny is fine. I locked the front hubs and it moved. Drove it around the yard and the rear tires broke loose EASILY! (this thing is a beast)

Is there something wrong with my transfer case? I am not sure of the transfer case shift pattern yet, but I tried different positions and it wouldn't move until I locked the hubs. I know there is a differential in the 203 case, so would some other problem cause the non transfer of power to the rear axle?

Brake problem maybe? Would bad front brakes cause this?

man it helps to write things out soemetimes.

 

A 203 should not have locking hubs. Was the t-case modified to a part time case?
Sounds to me as though it was not.
A truck with a 203 case and locking hubs will not move at all if the hubs are "free" or not engaged. This differential that is in the case sends power to the driveline with the least resistance, and since the rear axle is directly on the ground, it has good traction, so the diff will send power to the front. The front axle at this point will try to send the power to the axle shafts, and since the hubs are not engaged, you get no foward, or reverse in any gear.
Since the case apprears to not be converted, you will have to use one of the LOC features. This will lock the output from front to rear, and you will again obtain foward motion.
This is not a good idea to drive around like this, but can be done if the hubs are unlocked, though it still turns the entire front end, and your gas mileage is still pretty bad, which in itself defeats the purpose of locking hubs.
Many try to just install locking hubs to obtain a part time conversion, and this is just half of the equation.
The part time kit permits the operation of a true 2wd. 2 lo can also be obtained with this conversion.

 

This is exactly what is going on.

Thanks.

For what it's worth, I bought it like this.

 

Did not mean to imply anything.
This problem is a very common occurance.

 

I wasn't offended. Just clarifying.

Think the person who installed the locking hub axle was surprised when it didn't move? And a little embarrassed?

 

You could be right on the money there. Not the first time this has happened, I can assure you of this.