Thom's on Pulaski just south of Berteau. They're knowledgeable, courteous, honest, friendly and really know their stuff. I've been taking our Jeep there for 10+ years. http://www.thomsfourwheeldrive.com/ They don't only service 4WD cars so if yours isn't a 4WD don't let the name steer you away (ha ha, good pun!)
Royal Automotive on Elston/Central. Check out the YELP reviews. They don't lie! Awesome, friendly, honest company. My go to for years and through 3 cars. I've referred many friends and they all love the company as well.