98NWCherokee, that's a ripoff... at least if you have the skill to do it yourself. The parts cost $63 from RockAuto (for replacing ALL the lines at once):
1x Dorman 624-300
1x Dorman 624-301
1x Dorman 624-334
2x Dorman 700-814
Remove fan shroud and e-fan. Get your flare/line wrenches out, along with your 8 and 10mm nutdrivers, 3/8" quick disconnect / fuel line fitting tool, 14mm socket wrench, 7/8" flat open end wrench, 7/8" socket wrench, and 8+ inch lineman's pliers (you can get away with smaller ones if you are a gorilla, or foxwar71. Otherwise, get 8" ones.) Remove all the self tapping screws and clips holding the lines up, you may want to remove the mud/water blocking mat as well. Drain the transmission. Remove the upper transmission line fitting from the radiator (use your 7/8" wrench and make sure the outer nut on the radiator does NOT turn! or you may end up replacing the radiator too.) Use your lineman's pliers to cut both transmission lines flush with the fittings they go into on the side of the transmission. Use your 7/8" socket to remove the fittings from the transmission. (You could remove both lines from the fittings with the quick disconnect tool, but I prefer to replace the fittings as well, it's an extra 16 bucks and cheap insurance.) Put the new fittings in. Struggle with the quick disconnect on the lower fitting at the radiator end until you get frustrated and give up; use a pocket butane torch (keep a fire extinguisher on hand!) to heat the outer part of the quick disconnect till the plastic clip melts and yank it apart. Install all new lines, fill transmission with the same amount of oil that came out (use only DexIII/Mercon), shift through gears repeatedly to circulate new fluid through valve body and clutches and make sure all bubbles have come out, then check fluid level and add as required. It takes me about an hour and a half now if nothing goes wrong.
The first time I did this, the fittings were rusted into unrecognizable blobs on the transmission, so they took a while. The second time (on my MJ), United States Postal Smashers had helpfully run a forklift or something over my new transmission lines, so about 12" of the steel part of the longer one had been completely flattened. I discovered this months after having bought the lines and could not complain, and was in a friend's garage in New Jersey 250 miles from home with no way to get a new line in time to drive home, so I scavenged the same section off the old line (which luckily was entirely non-rusted ONLY where the new line had been destroyed), and patched the two together with a piece of 3/8" transmission cooler hose and some hose clamps. Still only took about two hours, even including the standing around holding the new crushed line and cursing and wondering what to do.
EDIT: oh yeah. Put the e-fan and fan shroud back on after doing that all :dunce: