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Howdy folks need a little help here. What I need to know is can the mm3 do tire size and gear ratio recalibration.
I have a 16 2500 Cummins with 37s and 4.10 gears. Deleted. Unfortunately what I'm using now does not do tire size and gear ratio.
I tried using hyper tech recalibration tool but the delete over rides the recalibration.
So my question is...... Is the mm3 capable of doing so in my truck and is it accurate.
Thanks.
IGOTACUMMINS thanked for this post
mm3 is capable, and it is as accurate as the numbers you put into it for tire size.
2014 Ram 2500 CCSB Ram Box Larime
2011 Ram 5500
2006 Diesel Jeep Liberty
RIP. 2016 Tradesman 2500 picked up 9/28/16 MM3 DRD Tuning 107K miles wrecked by jeep wrangler.....
Other Toys: 1973 Charger Bougham edition 400 big block 42K original miles
Unicycles (about 3 dozen)
6 in a row makes her go
OK so I got the mm3. I compared the speed against the calibration using a 2 different GPS apps. You can indeed tweak i got it to be accurate within 1 mph @ 85 mph. I'm running Nitro trails 37 x 12.5. According to manufactures specs there actually 36.5 x 12.5 I dialed in the mm3 @ 36.2 to get within 1 mph @ 85 mph.
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