Hey guys ive been lurking around here for sometime and ive used the search but no help. My Tahoe when i try to get on it and pass somebody or get on the gas hard it just like does not shift into any gear it just revs up like the tranny is slipping. But if i drive it slow it will shift all the gears fine no slip or what so ever. i have no check engine light. Ive changed the vss sensor and it does nothing to it. if this had happen to you let me know im coming to a dead end i hope its not the tranny.