A trend is beginning to surface with 10L1000 customers experiencing accelerated F drum wear. This wear occurs at the interaction between clutch stack and drum. Unlike the steel drum found in your earlier model Allison, the 10L1000 uses a lightweight aluminum drum. As the truck ages the steels of the clutch stack begin to wear away at the channels that hold them, this wear eventually leads to incomplete shifts or range tie ups. Currently, due to lack of aftermarket options, the most widely accepted repair is to replace the drum with a new OEM drum. Until now. The DHD hard anodized F Drum has been proven to extend the service life of your 10L1000.
In service testing shows that our hard anodized surface treated drums have a higher resistance to wear as well as a slightly increased ability to hold load. Third party Rockwell testing indicates up to a 4 point increase in material hardness at the surface. This increase in hardness directly correlates to an extended service life.
Hard Anodizing VS Nickle Coating?
Anodizing's electro-chemical processing doesn't just "coat" the drum. Post process examinations show that about 1/3 of the anodizing adheres to the surface of the drum and 2/3's of the anodizing enters the pores of the metal. This infiltration of the metal provides unmatched adhesion and strength benefits which makes our process superior to nickel coating. Nickle coating, although very slippery, only adheres to the surface of the drum. This surface coating is subject to flaking, adds no material strength and is susceptible to thermal expansion.
Features
Fitment:
Below is a picture from our transmission department showing advanced wear of the F drum. In extreme cases clutch steels will cut through the entire channel.
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