I just got back after trying out my new GPS and noticed my speedo is off by 5 mph. When my speedo reads 70 im doing 65. My tire size is 275/70/17. Can you guys help me recalibrate my speedo. Thanks.
Tune...
I just got back after trying out my new GPS and noticed my speedo is off by 5 mph. When my speedo reads 70 im doing 65. My tire size is 275/70/17. Can you guys help me recalibrate my speedo. Thanks.
Tune...
2003 Galaxy Silver Limited Edition GTP
Mods: 2.8 MPS | S2IC | XP CAM | GEN V | 65# | E85 | TOGS | N* TB | HPT PRO | Impala Brakes | BUILT TRANS w/3.29 GRS
2017 Chevrolet Silverado LTZ 6.2
Mods: HPT PRO
Go into your SPEEDO. Enter your new tire size as "32.2" .Enter your gear ratio as 3.42 unless you changed them. Its set as 29.76 right now. Click commit and it will do the rest.
Last edited by orangemagic; 07-17-2012 at 10:11 PM.
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