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1999 Porsche Carrera eth gear problem

cabreratiago · 2011-06-12T04:16:11+0000

Good day I love Porsche since i was a little kid,and i love my Carrera. Never had any big problem with the car so far. Yesterday i notice that the car was not shifting the 5th gear,well, it shifts sometimes, but at soon at goes to the 4th it doesn't go back to the 5th. I notice that 1 out of 20 times it shifts to the 5th gear, over 75 mph. So i decided to drive the car to my regular mechanic, he says since there are no codes from his computer or any light on the dash he has no clue what it could be. Its not normal,it shifts normal to the 4th gear but not to the 5th. Transmission oil was change around 5k miles ago. Can anyone help?