since i need to replace mine, and i really don't know what i am doing, should i pay the $100 to have an auto shop do it, or should i attempt it and risk the potential problems?

I would say it depends on how much time you have in case of unforseen problems, whether or not you can get a ride to work if something goes wrong, and if you can get to & afford a mechanic if you screw up.

I don't think it's a very hard job though, so you'd probably be ok.

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2007 Jeep Liberty Sport
Not Just Red..............Inferno Red !
Automatic, 4WD
Mopar Skids, Tow Hooks

Go here: http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=399

I did mine. They weren't too hard. Just make sure you have the right tools and all should go well.

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2005 4x4 Sport
Yakima Low Riders
Hidden Hitch
MOPAR tow hooks
RL Skink Step Sliders
Magnaflow
3/4 armored
235/70/16 Grabber AT 2
and a lot of little stuff...

Lol. I think you just scared him. It's not actually too bad. My dad and I have done it twice so far and had no problems. I have heard some horror stories on here, but take your time, double check what you're doing, and use the right tools and it should be a walk in the park for you.