Copied from a Tow411 post in 2007:
I have gotten several phone calls about Freightliner adding the Henderickson Air Tek front axle to their product line. This is version 3 and ironically, the original fork that we offered again fits the lower spring saddle. BUT, here is the problem. We are now dealing with the DETROIT oil pan again, because of the placement of the sump and drain plug. Clearance is at a minimum.
Here are the photos