Two weeks ago on a blazin hot weekend I brought my Nissan Frontier in because the car was bucking and transmission was slam shifting. You were very busy but checked my fluid and tried to get the irractic problem to repeat. With your assurance that transmission was not burning up, we were able to drive gently back to the Bay Area, much of the way in 3rd gear. You refused to accept any payment or tip though you were a great help. FYI, it was more an engine communication issue. The Nissan dealer found the crankshaft position sensor bad and suspected the cam shaft sensors might be damaged as well. They found the flex plate undamaged. After about $1000 and 2 days, we were fixed - and trouble free since. Thanks so much.