I would say that your shop screwed up and didn't set the gears up right unless the accident twisted the housing in some way. From what I have read, Rangers come stock with 3.73s or 4.10s depending on if they are 2wd or 4wd. Here is a place to compare some prices
http://www.stangparts.com/home.cfm?s...products/index
intallation info
http://www.stangparts.com/home.cfm?section=howto/index
http://www.superstallions.com/tech/d...ars/gears.html