Now over 1 year with a new 2011 F350 crew cab 4x4 Lariat 172" WB, SRW with the 6.7 diesel and with the 3.55 towing a 2011 Bighorn 3610. Truck has 22,000 miles with 8,000 of that towing. Pulled the rig to Colorado from Calif over 12,000 ft mountains with zero problems. The automatic compression...