I just got my car out of the shop, i was having a valve re seated. The car has 65k miles and i have never had any trans problems or slippage. I drove the car around all day with no problem for around 150 miles, on the way home it just slips in 3rd and 4th, like your pushing the clutch down, 1st 2nd and reverso have no problems at all, no slip or hesitation, whats the deal