Almost got stuck in Maine today after taking a ride up to Freeport. When leaving the tranny slipped like crazy in 1st and 2nd. Once moving it seemed OK. I think 3rd & 4th feel good w/o slipping. I managed to get home (130miles)without having to stop much. Prior to this there was no issue other than some flaring once in a while. At home now it does not want to move much in forward. I checked the fluid level and it seems fine. Also I had replaced the fluid and filter about 40K ago.
Does this seem like a B2 issue? or could it be some other problem. I am hoping I don't need to do major work on the tansmission now.
If it is B2 where is the best place for parts? Also should I do the K1 upgrade as well at the same time?

__________________
81 300D Turbo 190K sold
83 300sd 319K best $500 I ever spent-daily driverw/ 2 tank WVO set up