Personally, I have broken a wheel barrow full of r&p's, never once did I have a cap failure, I had a backbraced housing in the car, used a spool, and good axles, maintenance on it was replace the r&p, every 200 runs, and that for me was getting on the edge, after I built my newest engine 3 years ago, I went thru 3 r&p's in one season, but this was in a heavy car 3400lbs, but off the foot brake, I finally got tired of working on the rearend, and trans, all the time, went the dana route, and have been very pleased, 2 seasons, and 285 runs, and it still looks like new, I am not condeming the 8 3/4, they are very good rears, I ran them for a bunch of years, just got to the point, it was not feasible to use it anymore.

Dave