H&S XRT Pro Installation & Operation Manual page 27

reading when using non-stock sized tires, it is best to measure the diameter of the tire using
a tape measure rather than going by the printed tire size. In addition, using a GPS is a great
way to dial in your factory speedometer. Entering a larger tire size will cause the factory
speedometer to read higher while entering a smaller tire size will cause the factory speed-
ometer to read lower. This option can only be adjusted during the Install Download process.
noTe:
On some vehicles, entering a tire size larger than 35" may cause the ABS light to illuminate.
Transmission reset / relearn
The automatic transmission on the 2011 - 2013 6.6L LML Duramax has what is called
adaptive Memory and is constantly learning and adapting to different horsepower levels,
temperatures, driving habits, etc. We highly recommend performing a Transmission Reset
/ Relearn procedure after installing H&S tuning to help the transmission perform correctly
with the added horsepower. The transmission will eventually learn over time on its own, but
the relearn procedure gives a good baseline for the adaptive learning and helps to speed up
the learning process. To perform the relearn procedure, please follow these instructions:
When re-training the transmission, ALWAYS follow posted speed limits. Do NOT at-
tempt runs in adverse weather conditions such as snow, ice, rain, wind, or any other
conditions that may affect your vehicles traction or impair your visibility!
1. After you have installed the H&S tuning, turn the key to the ON position. From the Main
Menu, scroll down until you see the reset Transmission option. Select reset Transmis-
sion and follow the on-screen instructions to reset the transmission adaptive memory.
2. After the transmission reset is complete, it is recommended to perform each of the follow-
ing 0-80 MPH runs while in the Performance power level:
• 0-80 MPH @ 25% throttle position, then slow down and come to a complete stop.
• 0-80 MPH @ 50% throttle position, then slow down and come to a complete stop.
• 0-80 MPH @ 100% throttle position, then slow down and come to a complete stop.
The Transmission relearn procedure is complete.
noTe:
On any vehicle using 3" or larger lift blocks under the rear leaf pack, it is HIGHLY RECOMMENDED to install
traction bars when adding additional horsepower.
1-888-628-1730 • XRT Pro Installation Manual 27