The only setup I had squeal was the Torq Flo Severe Duty for the Ford Explorer with the 9 blade fan. The Hayden model with the 9 blade fan didn't squeal at all. I sold my Rubicon with that setup on it and I had good results with it on that Jeep. I now have an LJ and I would install it again, but it's cheaper just to get a new Hayden clutch and re-use the OEM fan blade.
05 Electric Lime Green LJ with a 4spd Auto, 2.5inch Suspension Lift, OME Shocks, OME Steering Stabilizer, 32inch BFG M/T's on 17inch Moab's using Spidertrax Spacers, UCF Aluminum TC Skid, Novak Cable Shifter, Brown Dog MML, Rokmen 1/2 BL, Banks CAI, Diehard Platinum Marine Battery, JW Speaker 8700 LED Head Lights, Safari Nets, G.E.A.R Overhead Console/G.E.A.R Tailgate Storage, Rugged Ridge XHD Front Bumper, Warn Gas Tank Skid, Mopar Rock Crawler Rear Bumper, Warn XD9000i Winch with Warn Wireless Remote, and a Uniden 880 CB Radio