Upgrading to 5.13 gears and 37" tires on my 13 Rubicon (auto trans). Other tuning options would be good as well, crawling, fuel savings (when I can) etc. What is the best programmer/tuner available to make the updates needed?
1995 Jeep Wrangler SE 4.0 MT
2013 Jeep Wrangler Rubicon 10th...