Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
OEM settings are for maximum fuel economy not racing performance. B&M shift + just alters these shift points and should not harm your transmission in anyways, however if you're going to beat the living crap out of your transmission without regular maintenance whether it is stock or slightly modified it isn't going to last. Expect the best be prepared for the worst.
Never drive faster than your guardian angel can fly