My 4bt Conversion is Finished.  I have put a bunch of miles on road and off on my Jeep now.  I have made many modifications since I started this project.  I love my 4bt Jeep.  I currently am getting around 16 to 17 mpg with 35” Nitto Mud Grapplers 4.10 Rubicon D44 front factory locker and rear ARB.  Factory AX-15 transmission is still holding out very well and not showing any signs of giving up..