Tires are 225/75-15
Not sure on the gears. Can I find it out without cracking em' open?
That is the size I was running (with stock gears).
I'd guess you have stock gears, if you haven't changed them. But if you want to check the gears......
You can jack up 1 rear tire, spin the tire exactly 2 revolutions, while counting the number of times the rear driveshaft rotates (it won't be an even number, so watch close, so you can see what the partial turn is). Then number of dshaft revs will tell you what gears it has. So if it has stock gears (3.727s), the dshaft will turn 3 and just under 3/4s times.
For the tcase gears, you can put the tcase in low, the front hubs to "free", jack both rear tires off the ground (or just one, if you don't have a locker/spool in the rear), the tranny in neutral, and spin the intermediate/input shaft to the tcase and see how many times you have to turn the intermediate/input shaft, in order to turn the tcase rear output shaft exactly 1 revolution. If it has stock gears, it will take 2 and 1/4 turns of the intermediate/input shaft to turn the output shaft exactly 1 rev.
Also, might be a dumb question, but want to check the timing....What the heck is the "check connector"? Couldn't find anything about it in the shop manual. Supposed to short it out when checking the timing?? New to me.
The check connector is the small white square connector that should have a black rubber cap on it, that is located in the wiring harness by the battery. You take a paperclip, or whatever, and stick in the end of the connector, in order to short the two wires together that freeze the timing (disables the electronic advance). Going from memory, I think the two wires you short are the bottom ones, when looking at the connector with the little clip thing on the side pointing up at the 12:00 position.