BD's design deflects the oil back onto the ring gear and into the pinion gear for cooler longer life. Other differential covers are large and bulky resulting in lubricating oil being flung off the ring gear causing addition heat and/or wear.
Catalog


This Part Fits:

Year	Make	Model	Submodel
2016	Chevrolet	Express 2500	Base
2001-2002,2006-2014,2016	Chevrolet	Express 3500	Base
2001-2002,2011-2012,2016	Chevrolet	Express 3500	LS
2011-2012,2016	Chevrolet	Express 3500	LT
2001-2005	Chevrolet	Silverado 2500 HD	Base
2015-2018	Chevrolet	Silverado 2500 HD	High Country
2001-2006	Chevrolet	Silverado 2500 HD	LS
2001-2018	Chevrolet	Silverado 2500 HD	LT
2007-2018	Chevrolet	Silverado 2500 HD	LTZ
2003-2018	Chevrolet	Silverado 2500 HD	WT
2007	Chevrolet	Silverado 2500 HD Classic	LS
2007	Chevrolet	Silverado 2500 HD Classic	LT
2007	Chevrolet	Silverado 2500 HD Classic	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2006	Chevrolet	Silverado 3500	LS
2001-2006	Chevrolet	Silverado 3500	LT
2004,2006	Chevrolet	Silverado 3500	WT
2007	Chevrolet	Silverado 3500 Classic	LS
2007	Chevrolet	Silverado 3500 Classic	LT
2007	Chevrolet	Silverado 3500 Classic	WT
2015-2018	Chevrolet	Silverado 3500 HD	High Country
2007-2018	Chevrolet	Silverado 3500 HD	LT
2007-2018	Chevrolet	Silverado 3500 HD	LTZ
2007-2018	Chevrolet	Silverado 3500 HD	WT
2003,2005-2010	Dodge	Ram 2500	Laramie
2006-2010	Dodge	Ram 2500	Power Wagon
2003-2010	Dodge	Ram 2500	SLT
2006-2007	Dodge	Ram 2500	Sport
2003-2010	Dodge	Ram 2500	ST
2008-2010	Dodge	Ram 2500	SXT
2010	Dodge	Ram 2500	TRX
2006-2007	Dodge	Ram 2500	TRX4
2003-2010	Dodge	Ram 3500	Laramie
2003-2010	Dodge	Ram 3500	SLT
2006-2007	Dodge	Ram 3500	Sport
2003-2010	Dodge	Ram 3500	ST
2008-2009	Dodge	Ram 3500	SXT
2007	Dodge	Ram 3500	TRX4
2008-2010	Dodge	Ram 4500	Laramie
2008-2010	Dodge	Ram 4500	SLT
2008-2010	Dodge	Ram 4500	ST
2008-2010	Dodge	Ram 5500	Laramie
2008-2010	Dodge	Ram 5500	SLT
2008-2010	Dodge	Ram 5500	ST
2016	GMC	Savana 2500	Base
2016	GMC	Savana 3500	Base
2016	GMC	Savana 3500	LS
2016	GMC	Savana 3500	LT
2002-2005,2015-2018	GMC	Sierra 2500 HD	Base
2011-2018	GMC	Sierra 2500 HD	Denali
2001-2002,2006	GMC	Sierra 2500 HD	SL
2001-2018	GMC	Sierra 2500 HD	SLE
2001-2018	GMC	Sierra 2500 HD	SLT
2003-2014	GMC	Sierra 2500 HD	WT
2007	GMC	Sierra 2500 HD Classic	SL
2007	GMC	Sierra 2500 HD Classic	SLE
2007	GMC	Sierra 2500 HD Classic	SLT
2007	GMC	Sierra 2500 HD Classic	WT
2002-2005	GMC	Sierra 3500	Base
2001-2002,2006	GMC	Sierra 3500	SL
2001-2006	GMC	Sierra 3500	SLE
2001-2006	GMC	Sierra 3500	SLT
2004-2006	GMC	Sierra 3500	WT
2007	GMC	Sierra 3500 Classic	SL
2007	GMC	Sierra 3500 Classic	SLE
2007	GMC	Sierra 3500 Classic	SLT
2007	GMC	Sierra 3500 Classic	WT
2015-2018	GMC	Sierra 3500 HD	Base
2011-2018	GMC	Sierra 3500 HD	Denali
2007-2018	GMC	Sierra 3500 HD	SLE
2007-2018	GMC	Sierra 3500 HD	SLT
2007-2014	GMC	Sierra 3500 HD	WT
2013-2018	Ram	2500	Big Horn
2011-2018	Ram	2500	Laramie
2014-2015	Ram	2500	Laramie Limited
2011-2018	Ram	2500	Laramie Longhorn
2016-2018	Ram	2500	Limited
2013-2015	Ram	2500	Lone Star
2012-2016	Ram	2500	Outdoorsman
2011-2018	Ram	2500	Power Wagon
2011-2018	Ram	2500	SLT
2011-2013	Ram	2500	ST
2013-2018	Ram	2500	Tradesman
2013-2018	Ram	3500	Big Horn
2011-2018	Ram	3500	Laramie
2014-2015	Ram	3500	Laramie Limited
2011-2018	Ram	3500	Laramie Longhorn
2016-2018	Ram	3500	Limited
2013-2015,2017	Ram	3500	Lone Star
2011-2018	Ram	3500	SLT
2011-2013	Ram	3500	ST
2013-2018	Ram	3500	Tradesman
2011-2015	Ram	4500	Laramie
2011-2015	Ram	4500	SLT
2011-2013	Ram	4500	ST
2013-2015	Ram	4500	Tradesman
2011-2015	Ram	5500	Laramie
2011-2015	Ram	5500	SLT
2011-2013	Ram	5500	ST
2013-2015	Ram	5500	Tradesman