Originally Posted by GRYDE001
Take the caliper off (while leaving it attached to the brake line) and clean (I use a grinder with a wire wheel attached) and polish the bolts that attach it as well as the sleeves that the bolts go through. Then use some special lithium grease on the sleeves(small packs of the grease can be bought at autozone for about $1 and 1 pack will do at least 2 wheels if not all 4)
If you have a special tool that pushes the piston back into the caliper, push it back in some, then re-assemble everything. The caliper should now freely move side to side on those cleaned and greased sleeves(at least the amount you compressed the caliper)
Repeat for both sides. Total time 30 min
I have a yj, not tj....not sure if your set up is the same.....but this applies for most vehicles with disk brakes
while its off inspect the portion of the piston you can see. clean it as well.
Its "black lithium grease".
One thing you can try is:
1.check fluid level, it should be lowish.
2. push pistons back into calipers like you were going to change pads - watch the fluid in MC...don't let it overflow.
3. lube etc as directed above
4. put all back together
5. Pump up brakes
see what happens. I've seen it before where the piston gets in a bind of sorts and causes the pull problem, but simply pushing piston in, and then letting it come back out normally fixes issue. (like there's a small catch somewhere inside.). Never had it recur on same vehicle...odd I know.