recently i noticed a problem with my tranny. I have a 94 Eldo 127K miles on it. The display said to change trans fluid so I had it serviced. They changed the fluid, filters and gasket. That did not correct the problem. around 40 whern the tranny is suppose to switch gears it doesnt. I have check the codes and they are PO29 and PO94. Any idea what it may be and what action can i take to correct this problem. any suggestion would be greatly appreciated.

thanks

 

double posting