transmission issues

My transmission pops and slides out of first gear but sometimes stays in gear. It also has issues going into reverse where it will grind, sometimes first grinds too. I'm hoping it's just the clutch or potentially the bushing and slider cap at the end of the shift lever. It's been difficult to...

So I have a 2000 tj with an ax-15. I know doesn’t make sense lol. As nv3500 or 3550 can’t remember which it is that comes stock in my tj is extremely expensive to rebuild for a 1/4 ton truck transmission when it went out last year I swapped an ax-15 out of a yj into my tj. It had an unknown...