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Lakewood · 11-08-2017, 11:57 PM

Apparently you are looking for the large seal that rides on the outer of the axle housing which is actually the inner surface of the large roller bearing assy (the wheel bearing), this seal stops the grease escaping to the brake drum area.
The 4245 is a much smaller diameter and is pressed into the inner of the axle housing and rides on the axle and stops the grease migrating down the central cavity of the axle housing and eventually into the diff. This seal is visible from the outside when the hub is taken off.
I am not sure on this but the number I have is 78-1175 and it should be 2.84" OD from Dennis Carpenter.

11-08-2017, 11:57 PM	#5
Lakewood Junior Member Join Date: Jul 2017 Location: Parkinson 4115 QLD Australia Posts: 15	Re: 40 Ford Rear Axle Grease Seals Apparently you are looking for the large seal that rides on the outer of the axle housing which is actually the inner surface of the large roller bearing assy (the wheel bearing), this seal stops the grease escaping to the brake drum area. The 4245 is a much smaller diameter and is pressed into the inner of the axle housing and rides on the axle and stops the grease migrating down the central cavity of the axle housing and eventually into the diff. This seal is visible from the outside when the hub is taken off. I am not sure on this but the number I have is 78-1175 and it should be 2.84" OD from Dennis Carpenter.