3.4L Some have reported sludge buildup - look for at least yearly oil changes

3.91/4.10 That may/may not all the ratios offered for that year, but most sticks have 3.91, autos 4.10

Low Range should be 2.57:1

No limited slips; Rumor has e-lockers in some LX models prior to TRD models, you can't miss the actuator on the driver's side of the third member, or the switch in the dash (RR DIFF LOCK) should be easy enough to ask about over the phone.

We have had a few tranny posts, this one might be of interest.

The manual hub conversion is involved & expensive. Here's Yogi's List, and the Off Road Solutions Kit.

As was stated, you need at least 2" to fit 32/11.50s. And all wider tires will rub the frame.