Outstanding service. After 3 mechanics, I was referred to Certified Transmission for my 2008 Jeep Grand Cherokee and they managed to find the problem after only an hour in the shop. I set up an appointment immediately, and rather than spend thousands fixing a transmission, I paid a fraction of the cost to have the transmission serviced. Whatever they did, it worked! And just like magic, the problem is gone. No more shaking, no more wondering how many miles I have left!