Well this problem was there before I replaced my 105s that broke with LS6 springs. We did some tuning/scanning. We leaned it out quite a bit, which felt awesome by the way, and now instead of it bogging now the trans is slipping. The RPMs are up but the car is not pulling much. In the scans it showed the input shaft spinning almost 3x the output shaft. I will probably be giving you a call tommorrow trannyman for a new tranny.