Mechanics

NO SHIFT

1997 Jeep Laredo

Transmission problem
1997 Jeep Laredo 6 cyl Four Wheel Drive Automatic

bought a reprogramed ecm from Computer Exchange Florida to replaced the malfunction one. (Air con not working and transmission do not shift to the appropriate gear while driving). It worked for 2 weeks (shifting) and bad again. The air con is still working ok.
Do you think the replacement unit is malfunction?
thank you
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Ontypotoi
August 8, 2010.



Is it doing the same thing as it was before?