Ok so last Sunday we had a meet in the bay on my way there my car started shifting rough. I put in some bars transmission additive with no improvements on the trans. I ended up driving my car home in 2nd gear (home was about 140 miles away) today was the 1st time I had a chance 2 look @ my car. That's the code that that came up. So I reset it n the cel went off then I took it out 4 a drive n it shifted fine through all the gears about 5 min n 2 the drive it started acting up agin n the cel came back on. The trans fluid was changed last Friday w synthetic ATF could that b the cause? I know the code says it's shift solenoid valve B. but is that all it is, or is my transmission toasted? Has any 1 replaced the solenoid or had similar problems?