smokin150
aka Diesel Weasel
If ur still having heat issues, i contacted zf after installing my gauge and seing temps in excess off 270-300 deg, they told me that if heat is an issue, use an lv-75/80 weight synthetic gear lube, and if the problem still exists to check the main shaft bearing. Been running about 210-220 since the change and i carry 70000lbs around every day. Normal opperatiomg temps on this trans are 160-210, higher temps under gcw towing but should never exceede 250* . Thats directly from the mani