tanahara

So when i bought my sc300 1992 the transmission was screwed up the o/d wouldnt engage it would just flash and 2nd gear would be skipped if i was in drive. ( but i could shift into 2nd using the shifter, but noo power hardly same as drive, but first had pretty good power) Well today my transmission has been acting very odd it will shift through 1,2,3 with lots of power or sometimes go go 1 and rev up to 5.8k rpms and then shift into 3rd with alot of umph, and sometimes it will just act normal ( broken normal 1,3 skipping second ) It has hit its second gear and just confuses me how it can be there and then poof. The fluid is fine. It does happen after about 5-15 min of driving..... I could use any help you all can provide im just confused lol ( on top of all that today a pipe broke pouring out anifreeze should be easy to fix.