So since the rebuild the 231 been “popping” out of low range. Its odd because at first I thought it could’ve been the shifter but after disconnecting the shifter and shifting it by hand, it made no differences. I believe that its a failed snap ring because the rebuild kit didn’t come with new ones.
This motivated me to start the next big thing. I picked up a Dana 300 to replace the 231. It is a much stronger unit due to being 100% gear driven (no chain) and its about 4″ shorter and the 231, this will allow for better driveline angles. The other reasons why I want to make the switch is that the 300 is simpler (having only 6 gears) and that I will gain the ability for front digs.