Put your trust in Ralph's Transmission! I recently brought my 2011 Yukon XL Denali in for a strange noise coming from under my vehicle that I couldn't pinpoint. I called and asked if they would mind doing a road test for me, of course it wasn't a problem. Ralph's staff contacted me after the road test and confirmed it wasnt the transmission or any part of the drivetrain, but rather something in the driver front wheel area. I truly appreciate that they checked my Yukon out without any hesitation and pointed me in the right direction. They even offered a referral to another repair shop who would be qualified to diagnose and repair my problem if I didnt have a shop in mind. I've been to a couple other transmissions shops since moving to the Modesto area back in 2005, both failed by far to compare to Ralph's. I wont take my transmission business to anywhere else. I highly recommend using Ralph's transmission if you ever need this sometimes costly and always inconvenient problem, they have competitive prices and a top notch warranty. I'm glad I found Ralph's transmission, I only wish I had found them sooner. Keep up the great works Ralph's transmission!