Bulletproofing your Columbia Overdrive Unit
To give you a little more information, Bulletproofing is:
1. Machining the A-24 Assembly to allow for inserting of a special tubular steel BAND to strengthen the assembly. Then remachining to size. (The original castings need to be reinforced and "banded" . . . as they had a tendency to start cracking in the machined groove where the A-30 cross sits and fits in.) See below photo.
2. Machining the A-30 Cross to allow it to now fit back inside the banded A-24.
3. Welding the A-17 Assembly: Welding of the inside legs of the A-17 "basket" to strengthen the assembly. And checking the other welds. (These parts are NOT reproduced.) If the A-17 is broken, the overdrive will not work. It should be noted that I have been able to repair and save some of the damaged units -- depends on how badly they are damaged. Call me for more information.