Nothing has been replaced other then the HGS mod. I dropped the pan and cleaned the sol. but didn't really find anything there. Repaired a connection on the trans overload switch. Checked the over voltage relay, this one has a fuse in it and it has never been blown. Checked the function of the switch on the shifter and that is working properly.

I made a pulse tester and that is what I'm using to get the codes. I can access the MAS, EZL both of which have a list of codes in alldata but I couldn't find a list on the HGS mod. I used pin 14 for the MAS, 8 I think for the EZL and 13 for the HGS. The code 9 I pulled from the HGS I thought was the trans overload switch but I'm not sure of that because I couldn't find an actual list for the HGS.

Not that long ago when driving the car with the new HGS installed the car shifted perfectly for about 50 miles so this leeds me to believe that it is a wiring/connection issue rather then a transmission fault. I've checked the vac lines and found no problems.

My understanding of the system is that the controler looks for load, RPM's and the position of the shifter switch. All things being right it is suppose to shift into 5th.