4 speed slipping out of second gear

You need to put shifter in neatral then slide a 1/4" pin (old door hinge works good) . Has to be the right length to get it in there with the body clearence (Guessing around 2" long). Here's a good video.Not a 883 but same process. You may on need new bushings. I've heard buy the steel ones not the brass. I read that here somewhere after I bought the brass kit :BangHead:
Guess next time around for me.
Good luck.