I have an 03 TB 4x4 with 80,000mi. The transmission always upshifts slowly, either while acceleratiing slowly or wide open throttle. The shifts just seem to take longer than they should. They also seem to occur later then they should. On light throttle 1-2 is about 20mph, 2-3 at about 30-40mph and so on. The TCC also locks up very slowly and doesn't seem to lock solid. Any ideas?