The differential cover seal is used to keep gear oil from leaking out of the differential.
33-11-1-211-679-M17
Gasket for Differential Cover, 750iL Brand: Victor Reinz [More Info]
$2.00
Differential Lock Plate
33-12-1-205-138-M9
Lock Plate for Differential Input Flange Nut, 750iL Brand: Genuine BMW [More Info]
$4.25
Differential Seal
33-12-1-213-949-M9
Seal Differential Pinion Shaft 50 X 80 X 10, 750iL Brand: Genuine BMW [More Info]
$46.75
Swepco Transmission Fluid
This stuff is the industry standard for keeping your transmission alive and kicking. Some owners will swear that their transmission shifts better with it loaded with Swepco 201. No additives are needed - they're all in there, including a new super-duper, space-age, low-fat, high fiber additive call Lubium that forms a protective film on the internal components. And, if that isn't enough, it's this really cool blue color too!
Fits most 1/2 gallon and gallon bottles. Unique hands free locking nozzle. Each depression accurately dispenses 1 oz. of fluid. Ideal for hard to reach places. No mess, no waste - easy to use. Works great for filling transmissions and differentials. Made of durable ABS plastic. Tough, easy to use and reuseable. NOT FOR USE WITH BRAKE FLUID!