4LE85 no OD
Thread Starter
Teching In
Joined: Oct 2013
Posts: 14
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From: Huntsville AL
4LE85 no OD I have a 67 Cutlass with a LY6/4L85 trans. The trans upshifts fine, except to 4th or OD. I had a friend who does tuning, but not troubleshooting, hook up his laptop and using HP Tuner, was able to upshift and downshift to and from OD from the laptop. One of the screens or windows showed "No MPH", which he said would cause it not to shift.
I have an electronic Autometer speedometer that reads fine, so there is apparently a VSS signal from the trans. Another window shows that the ECM is "set" to an auto trans.
I have checked the brake light switch, it has 12 volts and functions apparently fine. Needless to say, I have little to no expertise on this. I have attached a screenshot of the transmission settings, but I don't know what I am looking at or for... I also have the complete HP Tuner files of my operating system.
I forgot to mention that a couple years back I had the car at a shop for some work, including a tune. They changed out the ECM/TCM as they were different models. I trailered the car home, and it basically sat for 2 years before driving it.
Any ideas, or where to look?
Thanks!!!
I should add that there are no codes stored, and all fuses are good.
I have an electronic Autometer speedometer that reads fine, so there is apparently a VSS signal from the trans. Another window shows that the ECM is "set" to an auto trans.
I have checked the brake light switch, it has 12 volts and functions apparently fine. Needless to say, I have little to no expertise on this. I have attached a screenshot of the transmission settings, but I don't know what I am looking at or for... I also have the complete HP Tuner files of my operating system.
I forgot to mention that a couple years back I had the car at a shop for some work, including a tune. They changed out the ECM/TCM as they were different models. I trailered the car home, and it basically sat for 2 years before driving it.
Any ideas, or where to look?
Thanks!!!
I should add that there are no codes stored, and all fuses are good.
Last edited by 19sixty5; Aug 30, 2017 at 10:32 PM. Reason: additional info
