I"m a fool for still having an 8 3/4 in my car. I broke a R&P mid Nov. It also broke the input shaft in my 904 & laid over the sprag.I fixed all of that. Ten runs later the splines on the convertor turbine broke. When they break it can injure lots of stuff!! My 8 3/4 has all the tricks. This isnt the first time I've broke the R&P.I try to change R&P after 100 passes. My car weighs 2750.I leave at 4200. I just wish I would have switched earlier. I'll most likley change to a Dana because I can save a little due to friends. If you going to whip on it hard you'll be money saved to go ford or Dana 60.