wilmax17

I'm looking to get 4.10 gears in the next few weeks on my 5spd GT (CAI, LT headers, catback). I have an evo 93 tune and was wondering if the tune needed to be completely changed, or just the odometer needed to be recalibrated for the new gears. I wasn't planning on going back to evolution performance to install the gears, so if a complete re-tune isn't necessary could the shop who is installing the gears accomplish the odometer calibration with my SCT2? Or would evo have to completely change the tune I have on it now to account for the 4.10s?

I hope this made sense, I don't 100% know what I'm talking about...

Thanks.

mds08

No re-tune needed, just the calibration with your tuner.

jagass

You don't have to retune...

07 GT E UPP

+ 1000 Enjoy your 4:10's

SirKnightTG

Depending how the tune is written, you may need a new tune. Bama tunes would need to be updated by Doug.

sweetlou69

out of curioustiy what happens if you change gears and not change the tune? would it be possible to cause actual hardware damage?

officespace56

Why would Bamachip tunes have to be updated? Can you not mess with the gear ratio if you have a Bamachips tune??

stealth_GT

could someone just re-install their tune and change options when the screen pops up? I did that once and I had the option to toggle between many of them, gear ratios being one of them (SCT x3)

jahudso2

I have one of doug's tunes on my programmer and you can go in and change the gear ratio manually which I have done when I installed 3.73 gears. If you have a manual transmission, I wouldn't worry about getting retuned, I would just change the final drive ratio in your tuner which takes all of 30 seconds to do. I have heard that doug tunes the transmission shift points differently in the automatics depending on the final drive ratio. Therefore, if you have an automatic, going without a retune may or may not damage your tranny. I think you would probably be safe, but not quite as fast and maybe a little jerky.

tdcalhoun89

I would contact the people who tuned your car and ask them... better to be safe