I've got all the lastest firmware and updates loaded now. Still not seeing a gear/axle ratio option. I've worked with support and haven't been able to get this sorted.

@06MonteSS is it possible I could post/send you my backup and lasttunewritten files and you could make the change for me? Thanks!

Thanks for the response. I'm working with support now.

Bump for visibility. Thanks!

OK I did manage to update the firmware.

Still not seeing an option for gearing change.

I found and used the Update Agent. It loaded some files to the device, but still no change. My firmware info now looks like this.

Thanks. I went through every menu today and couldn't find it.

Is it possible I need a firmware and database update (see screenshot attachment)?

Hi again,

I went into modify tune, but did not see an option for gear axle ratio. Please let me know if I need to send you my tune. Thanks!

Awesome, thanks for your help with this!

I'm swapping from 3.42 to 3.73 soon on a 2006 Chevy Tahoe 4x4. How do I make this change on my tuner? I'm running a Diablew tune, do I need to send my files somewhere? It's been a while since I've made any changes. Thanks for your help!

My current GM tune is 1r01r, this thread shows 1r01d. I'm assuming I have the latest tune correct?

This appears to be an old release list. Is there somewhere we can view/download the latest releases. For my purposes it would be to compare. Thanks.

OK, thanks for the heads up. That's why I ask questions. Appreciate the help. I'll just wait until after fill up.

I want to try the Diablo tune, however I'm wondering if it's OK to use an octane booster rather than wait until I'm ready for fill up as I usually run 87 octane? If so, which brand is recommended? Thanks.

Awesome, thanks!

Here ya go...