Don St Peter Posted September 9, 2009 Report Posted September 9, 2009 After driving and heating things up I get "oil " leaking past the hubcaps and down the outside rims on both rear wheels, (the rt. more than the left) in fairly small amounts. I confirmed it is was not brake fluid by the taste test and again confirmed the brake cyl. & system is leak free by inspection after pulling the hubs. I can see what appears to be differential (rear end) oil puddled around the outside of the rear wheel bearings. I guess my question is, can diff. oil get past the seal/bearing somehow ( rearend overfill, etc.), and what is the proposed solution? I have not added grease thru the rear zerts recently and am aware of the "caution" in the 40 service manual to not put in too much grease as it may be forced past the wheel bearings and onto the brake drums. Of course I can see it is not the color of the "grease" I use anyway. Sorry for the windy question. Don Quote
james curl Posted September 9, 2009 Report Posted September 9, 2009 Does the 40 have an inner and outter seal as the 46/48s do? The inner seal keeps the differential oil on the inside of the wheel bearings on the 46/48s. If it does then the inner seal is probably gone bad. Quote
Dodgeb4ya Posted September 9, 2009 Report Posted September 9, 2009 I think this year uses a 5 hole seal plate type seal. Can't seem to find any pic's. Seal lip rides on the brake drum. Quote
BobT-47P15 Posted September 9, 2009 Report Posted September 9, 2009 (edited) My P15 has what I have come to think is a 39 Dodge, or maybe Plym, rear end. It had both inner and outer seals. Had to pull the axle to replace the inner....looked like this..... Had this outer....... Edited September 9, 2009 by BobT-47P15 Quote
Don Coatney Posted September 9, 2009 Report Posted September 9, 2009 Check your axle vent. I agree. Sounds like a plugged vent. Quote
Don St Peter Posted September 10, 2009 Author Report Posted September 10, 2009 WOW! Great info on vent bolt. I will be checking it first. Thanks a million. Don Quote
Normspeed Posted September 10, 2009 Report Posted September 10, 2009 They clean up real nice. These old cars were made so well. You can remove the hollow vent bolt without removing the brake lines from the brass block. That way there's no need to do any brake bleeding later. Quote
BobT-47P15 Posted September 11, 2009 Report Posted September 11, 2009 A couple years ago, after someone mentioned it here on the forum, I took my valve out and cleaned it. It was completely stuck up.....really all I had to do was soak it in paint thinner and work with it a bit. Can't tell any noticeable difference since the cleanup, but I'm sure it didn't hurt. Quote
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