This is an interesting thread. I know a couple of former co-workers that cautioned me against the 4-speed U-joint when I was swapping from a 3-speed to a 4-speed in my '53 3100. They claimed they had to replace their U-joints multiple times due to breakage. Maybe that was why...the small hole in the bearing retainer was not being filled with tranny fluid, leading to U-joint failure.
Going downstairs to the garage to check mine now...
