I'm new to Jeeps, but have 30+ years of mechanic experience. It's definitely the sycro's and if you keep grinding the gears to shift you will destroy them as well. I would have a free estimate done at a local reputable tranny shop.
That transmission looks like a good deal. The only thing that I would be leary of is that you can't actually see it in person before you buy it. I just paid 400 dollars for a used tranny last year from a local guy, so the price is good.
If you decide to sell your hard top, let me know how much you want for it and I may buy it. I have been looking for one but have not yet found a good deal.
'95 wrangler, SQUARE HEADLIGHTS, 4 cyl., 5 spd., 4" superlift w/rancho rs9000 series shocks with in dash controller, 2" body lift, 35x12.5 15 tires SureFire x300
A person from another forum had similar gas filling problem (not a wrangler though). It would only fill up so much and then it would stop and then if you try to fill up again later it would work again. It turned out that the car had a wire mesh right after the fill tube or something there that was cloged so it would fill up the tube and then it will take a while to drown in the tank. I also say the syncros but i dont know how to change them.
I on the other hand love messing with small pins and stuf as long as i know where they go lol I would ask for a quote at tranny shop and see how much you will need first and then sell the top. Unless i never use it i wouldnt sell it.
To repair the sycro's you would have to drop the tranny and transfer case, disconnect the transfer case from the tranny and completely disassemble the tranny. A tranny rebuild kit with new sycro plates is only about $200.00, so if you have the mechanical applitude you can save big bucks. If you've never been into a tranny or don't have mechanic experience I don't recommend it.