So you have slipping and bucking at the same time?
I have a 95 LX with the v-6/auto that did slips and it to was worse when it was cold out. When starting out the tranny wouldn't engage until the engine reved up and then it would engage hard - until it warmed up and then it would be OK.My trans was very hard on the fluid - requiring frequent changing. About 6 months ago I did a 24 qt flush (drain & fill 6 times) and it didn't do it again - until about a week ago. So I did another 16 qt flush. But when I finished it won't even engage until it really revs and then it immediatly lets go. It's really broke now!
I've had the pressure checked (before it died) and it was OK - and no error codes either. If I can nail down what the problem is/was I'll post it.