Tell the wife to move her boody over the spinning tire. If there still isn't enough traction tell her see needs to eat more. /forums/images/graemlins/grin.gif Or better yet, cause noone wants a wife 2 ax handles wide, tell her to 'hit that sip'y hole with some speeeed or else you'll get bog'd down in the quagmire'. /forums/images/graemlins/smirk.gif
On a bit more of a serios note, you may need to replace the rear tires with some bar tread tires. The only way I know of to get a LGT with diff lock is to spend near $10k for new or maybe $5k used. Tires may be cheapest.