I agree with the other posts. Nothing to adjust on the 5t. If I had another 5T I would seriously consider welding both sprags solid (it's obvious, once you open it up) and use air to ram it into forward going or rearward going, if I so desired, and just forget about an operational sprag. A sprag is a one way clutch, which is why you need two. One for forward and one for reverse. They don't do anything unless there is a net rotation between the front and rear driveline. That means tire slippage, so the sprag starts to apply power to the front in that event. By welding it solid, your front end is either in or out, depending on your decision, not some sprag's. Just add one valve in the line feeding the transmission. That valve has to dump the pressure off if it is shut off. Semi-standard valve configuration. Not hard. Irv