QUOTE(Cheapsnake @ Nov 28 2009, 08:23 AM)
is there any good publication on rebuilding these things?
I think the Haynes 914 Manual has enough info to tacke the basics.
I used a Factory Repair Manual for my training, and tore a bunch of boxes apart to get the hang of it.
Replacing synchro hubs takes some special tools, but you can send the gear out to have it done.
Any operation on 2nd to 5th requires a plate that supports the roller bearings while the stack is unbolted.
Changing the first/reverse parts can be done with the gearstack installed in the case.
There are a couple of easy inspections that don't require any special tools or training:
The first thing I suggest doing is drain the gear oil and check the drain plug to see now much metal shavings are on the magnet. If its fairly clean, just re-fill the box with fresh Swepco and run it.
Another thing you could do while the box is drained is remove the rear cover, unbolt the 1st/reverse shift fork, remove the slider to inspect the teeth for wear and have a good look at the first gear synchro.
Before loosening the fork bolt, carefully mark the position (both linear and rotational) with a Sharpie so you can put it back exactly where it was.
Also you have to be careful with the idler gear assembly which is loosely supported on a short shaft on the rear cover.