I'm shopping for a new tow vehicle to replace my '88 E350. I currently have a limited slip differential. I've found the vans to be far cheaper than a truck, so I'm looking for a newer, but used, E350. For the back roads I traverse with a large trailer, and driving over the mountains in the spring, limited slip is the next best thing to 4x4. Limited slip is hard to find, but I'm seeing retrofit kits for ~$400.
The differential is one of the few automotive projects I've never undertaken. How easy would it be to retrofit limited slip? Does this involve removing the ring & pinion? What about shimming gears for proper clearance?
Thanks for any info.
-Jeff Deeney-