Hard Starting when hot
The tracloc limited slip that you have is known to work well for a lot of wheelin, I wouldn't spend the money unless you need something that locks 100% for your type of wheelin. Everybody's got opinions on the air lockers, but they can be troublesome with keeping air pressure in the lines.
I'd put a locker in the front axle if you haven't already. What type of 4wd do you have, part-time or full-time? Do you know if you have the vacuum disconnect on the pass. side of the front axle?