Standard Jaguar Diff versus "Dana" Style Differential

There are several visual differences between the standard Jaguar XJ-S differential and the "Dana" style diff which was primarily used in the XJ-S during the 1985 model year, although some European Jaguars also used this unit. The pictures below will help you determine if you have a "Dana" differential.

Standard Jag Diff	"Dana" Style Diff
Bottom of diff: Note the drain plug and non-flat bottom	Bottom of diff: Note lack of drain plug and the completely flat bottom
Output flange: Note shape of 5-bolt bearing retainer behind flange. Caliper mounting boss is part of the bearing retainer	Output flange: Note 3-bolt triangular bearing retainer behind flange. Caliper mounting boss is part of differential case itself
Pinion flange: Circular	Pinion flange: "Square"