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Rear gear swap to 4.56 and Auto Rev Match on '22 GT PP

RonsterGT

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I'm considering a differential gear change to 4.56 from the stock 3.73.

As most of us know, the '18+ M6 D4 has different ratios than the '15-'17 M6 D4.
'19+ M6 D4 incorporates Auto Rev Match (ARM).

I owned a '16 M6 and the difference in the D4 gearing between '15-17 and '18-'22 is rather noticeable.

I have scoured this forum and discovered I can swap gears and likely won't need a "tune", since others have done this successfully.
However, their cars did not have Auto Rev Match (ARM).

My question is:

"Will I need to tune for the new gear ratio in order to maintain ARM functionality, or will the computer(s) involved self-adjust?"

Thanks for your insight.
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K4fxd

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It will not self adjust to 4.56. You will need a tune so call some tuners first.
 
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RonsterGT

RonsterGT

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It will not self adjust to 4.56. You will need a tune so call some tuners first.
Thanks for your reply.
If I get a hand held tuner that allows for 4.56, would that work? No full tune download, simply gear ratio change is all I'm considering.
 

K4fxd

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Wengerd seems to be very customer oriented. I'd contact them and ask if they would give you a gear tune only.

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Wengerd Performance

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Correct you will need a tune as the BCM will not self adjust for that ratio. They self learn 3.15-3.77
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