drptop70ss

iTrader: (21)

Hi,
hoping to get some information before I dive into this. I have a 95 LT1 with an S trim supercharger, advertised as 500+HP and PCM is tuned for the blower, cam, head work, etc..and the engine came with a stock 4L60E that was swapped into the car, I assume the last trans gave up.
I want to put this engine into an older car and swap to the 4L80E just to give the trans a chance to live. I have found the pinouts for the two transmissions, looks like one wire has to be moved, and the logic has to be reversed for one shift solenoid. I have tunercats and have read that I can do the logic swap with tunercats instead of hard wiring the change. Does anyone know exactly where and what I have to change in tunercats? Also should I make any changes to the transmission tables with the 4L80E? Any help would be appreciated, I dont even want to try using the 4L60E.

drptop70ss

iTrader: (21)

Found all the information online, pinout change, how to reverse the logic on the shift B solenoid with the relay or with tunercats, now just have to try it out. Only thing I have not found yet is if there needs to be any wiring done with the 2nd VSS sensor, I will post in the drivetrain forum. I am suprised I did not get any responses here yet, figured it would be pretty common knowledge with the amount of 4L80E swaps out there.

drptop70ss

iTrader: (21)

Does anyone know what table in tunercats shows the solenoid logic so I can reverse the logic for the shift B solenoid? Rather not use the relay to reverse it if I can do it in the software. Also are there any fault codes or changes to the 4L60E tables that will make the 4L80E shift better using that program? Wasnt sure if the first gear difference was a big deal or not, also would like firm shifts if possible.

2xLS1

iTrader: (25)

I'm not aware of anything in the Tunercat software that will let you do that. If you are a legitimate purchaser of TC, you might try emailing John at TC and see if there is anything he can add to the definition file. He is incredibly helpful to his customers.

drptop70ss

iTrader: (21)

I will do that, I am a legit owner of the software. I had read that the option had been added to tunercat, I still have to update mine to the latest version.

drptop70ss

iTrader: (21)

all set, had to update my $EE file to get the tables needed, my down level file did not have them.

2xLS1

iTrader: (25)

I should update mine then. I have ver. CY. Their web site shows they are up to ver. DC for the $EE. I know I've never seen any tables for changing shift solenoid logic. Its rare that I'm ever asked to tune one of those 94-95 f-bodies any more.

marshall51875

I know this is an old thread but did you ever get this to work, if so can you give me details please, on exactly how to do this to get the 4L80E to work with the 1995 LT1 ECM.