NB & NCII V8 Fairlanes
Join Date: Feb 2001
Location: Bibra Lake Western Australia
Re: NC Fairlane Air cond causing trans problems
I assume you have tried the air con self test. On warm engine with ignition on and engine on hold down the floor and off buttons together on the Climate Control Panel then release them. The air con will go through a self test procedure and display codes. If OK it wil read "Off" if not it will flash codes "E1" to "E7" if a code flashes press "auto" on the air con panel to see the next code.
The Transmission also has a self diagnostic mode and can also display codes if you have a code reader which will also confirm if the fault is caused by the air con or not, A code 67 is a air con fault. I suggest you do this first to confirm you are not wasting you time. Other no air con faults can cause downshifting symptoms. It might just be a loose wire. There is also a overheat mode which locks up third an fourth gear.
If you can tell me if it is a 6 or V8 and what trans fault it has (check if it shifts manually up and down OK), I may be able to offer other suggestions.
Last edited by Aussiblue; 02-29-04 at 05:18 AM.