sonyman87 Posted October 7, 2003 Report Posted October 7, 2003 would it be possible to drop a obd1 ecu in place of the obd 2 ecu.. how hard would this conversion be? i want to get my shiftpoints changed on my 4t60e and nobody that i know of will make a chip for it.. Quote
Robby1870 Posted October 7, 2003 Report Posted October 7, 2003 The tranny shifts based on engine vacuum, the computer doesnt tell it when to shift, so changing computers wont do anything Quote
sonyman87 Posted October 7, 2003 Author Report Posted October 7, 2003 you are OBD1 i shouldnt be...... last time i checked it was obd2 95 lumina LS... first year for the obd2 Quote
sonyman87 Posted October 7, 2003 Author Report Posted October 7, 2003 The tranny shifts based on engine vacuum, the computer doesnt tell it when to shift, so changing computers wont do anything isnt that hte 4t60 i have the 4t60e "e" meaning electric shift control Quote
Robby1870 Posted October 7, 2003 Report Posted October 7, 2003 The tranny shifts based on engine vacuum, the computer doesnt tell it when to shift, so changing computers wont do anything isnt that hte 4t60 i have the 4t60e "e" meaning electric shift control You'd think that but, not really. It still uses vacuum to shift Quote
cutlassdude96 Posted October 7, 2003 Report Posted October 7, 2003 you are OBD1 i shouldnt be...... last time i checked it was obd2 95 lumina LS... first year for the obd2 you may have an OBDII conector but you are OBDI, 96 was the first full year for OBDII Quote
brian89gp Posted October 7, 2003 Report Posted October 7, 2003 You'd think that but, not really. It still uses vacuum to shift Wrong. The only thing that deals with vacuum in the 4t60-e is the pressure control solonoid, all it does is control firmness of shifts. EVERYTHING else is controled via the ECM. It is possible but you need to swap wiring harnesses as well and do some re-wiring for the bulkhead connector. Then a small amount of tuning to get the 3.1 chip to run the 3100 engine. I have not done this to that engine so I am only speaking vaguley here.... Quote
Robby1870 Posted October 7, 2003 Report Posted October 7, 2003 You'd think that but, not really. It still uses vacuum to shift Wrong. The only thing that deals with vacuum in the 4t60-e is the pressure control solonoid, all it does is control firmness of shifts. EVERYTHING else is controled via the ECM. It is possible but you need to swap wiring harnesses as well and do some re-wiring for the bulkhead connector. Then a small amount of tuning to get the 3.1 chip to run the 3100 engine. I have not done this to that engine so I am only speaking vaguley here.... I stand corrected :oops: Quote
brian89gp Posted October 7, 2003 Report Posted October 7, 2003 The 4t65 and 4t80 go 1 step further and place pressure control under ECM control. Electronic is the way to go anymore. Quote
toastyghost Posted October 7, 2003 Report Posted October 7, 2003 electronic? what about manual? Quote
sonyman87 Posted October 7, 2003 Author Report Posted October 7, 2003 so i have an obd1 ecu.. then why cant i get a chip for the stupid thing this is a 3.4dohc were talking about Quote
cutlassdude96 Posted October 8, 2003 Report Posted October 8, 2003 you have a non removable chip the computer has to be reprogram. Quote
sonyman87 Posted October 8, 2003 Author Report Posted October 8, 2003 does anyone here have experience with this? or willing to help me reprogram it Quote
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