No lifted axles have been added for the lower ets game versions support.
Since the release of the truck was supported for ets2 version 1.8.2
Im not sure wich version between 1.8 and 1.14 will run this mod.
I have tested in ets2 version 1.14.2 and was still working for me.
This mod includes 3 different lowerd chassis for the Kenworth w900 longline created by Bennekeben