Originally Posted by expeditionswest
Please read the information at the link I provided. All the research that was indicated at these links were done a VERY long time ago, a lot of it done at universities and research centers around the world. If you follow the references, you can trace it all the way back. Good luck. It's all I can do.
2005 Jeep Wrangler Unlimited (LJ), silver w/black top auto 4WD - Scout Recovery Vehicle
1977 International Harvester Scout II, red w/white top manual 4WD - Jeep Recovery Vehicle