BEWARE Took in my trailblazer SS for a rebuild on my 4l70 paid for a high performance package with a high stall torque converter , and all failed 3 time's within 2 months. Wasted 3 tows taking it back to him each time transmission failed within 2,000 miles, tried to blame me for damage to transmission saying I was mistreating my vehicle. “ like I want to come back every two weeks to have my transmission rebuilt “ only reason to come back is because this man offers warranty of 12,000 miles or 1 year which ever comes first which seems great at first but I couldn’t make it past 2,000 miles with out having to return it into his shop for transmission failure. After the 3rd time he decided to install a 4l60 and stock torque converter without confirmation and with hopes I wouldn’t notice. Had to ask him to return all internals to the 4l70 and proceeded with an attitude trying to justify his actions BUYERS BEWARE