Let me get this straight:
- you have a custom tune right now in your PCM.
- you want to change the axle ratio setting on that custom tune.
if my understanding is correct all you do is go in to performance tune. select what you want done and re-install the tune.
Every time you plug the predator in, it reads what tune you have in there so all you're doing is reinstalling the same tune you made before, only with the correct axle ratio change.
hope that helps.
- you have a custom tune right now in your PCM.
- you want to change the axle ratio setting on that custom tune.
if my understanding is correct all you do is go in to performance tune. select what you want done and re-install the tune.
Every time you plug the predator in, it reads what tune you have in there so all you're doing is reinstalling the same tune you made before, only with the correct axle ratio change.
hope that helps.
Is this a new Predator? If so, then the first time you plug it in, you need to backup the original tune. It should do that automatically the first time.
Then you'll be able to go into the Performance Tune and modify it. Then, you would install the Performance Tune with the changes you made to it. Later on, you just plug it in and make changes to the Performance Tune, then write it into your EEC. It will just overwrite the last tune you wrote.
Then you'll be able to go into the Performance Tune and modify it. Then, you would install the Performance Tune with the changes you made to it. Later on, you just plug it in and make changes to the Performance Tune, then write it into your EEC. It will just overwrite the last tune you wrote.
For some reason when I try to modify a parameter in the current tune installed it doesn't reprogram correctly and ends up crashing. I have to re-install the factory tune, modify the performance tune parameters and then install the performance tune. Letting you know in case you have issues with changing the gear ratio parameter.
If I made multiple edits prior to flashing, meaning I change a parameter one way, then change it to another way, then change it again before flashing it, I often do the RESET ALL PARAMETERS and start over. I found that if I make mistakes or change my mind on edits, it tends to get all messed up.
A copy of the custom tune still resides in your Predator. I bet you don't see "Performance Tune" anymore. The menu should show "Custom Tune". Go modify the parameters on the Custom Tune, that then flash it into your car again. Repeat as necessary.
To be more specific:
Select Custom Tune.
Select Modify Tune.
Select Axle Ratio.
Click left or right until you get to the closest match. Mine shows 4.09 for my 4.10 gears.
Click the center button to OK it.
Confirm it.
Acknowledge the message that says it will be effective on your next flash.
Hit ESC to back out until you get the prompt to flash your car.
Select Yes.
The rest should be familiar ground if you've flashed it before.
To be more specific:
Select Custom Tune.
Select Modify Tune.
Select Axle Ratio.
Click left or right until you get to the closest match. Mine shows 4.09 for my 4.10 gears.
Click the center button to OK it.
Confirm it.
Acknowledge the message that says it will be effective on your next flash.
Hit ESC to back out until you get the prompt to flash your car.
Select Yes.
The rest should be familiar ground if you've flashed it before.