JayB said:When I got 10,000 miles on mine I decided to change the fluid to synthetic. Before pulling the drain plug I pulled the fill plug, 36oz drained out with the fill plug removed. After fully draining the trans I refilled it up to the plug, then jacked up one side of the truck and put in the extra quart. Jeff
I understand the G56 calls for ATF+4 fluid. When you switched to synthetic, what did you use? How is it working and how many miles are on it now?