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#16
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Quote:
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#17
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There Shouldn't be any sludge in your diff....no clutches to wear out etc.. If there is sludge I would consider that a Very bad thing.. All I do is wear latex gloves and wiggle out what I can from the drain hole after it's done dripping.
If it's particularly dirty I'll spray a bunch of brake clean in the drain/fill hole..use paper towels etc to soak up what I can out of the bottom, fill the diff w/ a cheap fluid, run it up in the air for a few minutes, drain again and re-fill with the correct fluid. Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
#18
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UPDATE:
well I changed the diff oil. sound is still there. So now it pretty much only leaves the bearing as the cause. some notes on changing the diff oil: - I needed a 14mm hex socket. I don't know about you but I didn't have one, so it took a little bit of driving to find one. I guess those larger sizes are not that popular. - gear oil stinks. like dead-animal stinks. yuk. - having some kind of pump that attaches to the new-oil bottle would have saved tons of time and oil that will find its way on you. Time to order that bearing. |
#19
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Well, it still may Not be the bearing... Could just be wear on the gear set.. If they don't mesh Just right they'll make noise.
Again, I wouldn't worry...I know of diff's that have been droaning for Years w/o issue. Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
#20
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for posterity, I replaced the driver-side rear wheel bearing and problem is 100% fixed. I had gotten so used to the sound its weird to drive and not hear it.
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#21
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I take it you had to purchase the press/tool etc...? The bearings are Surprisingly expensive, no?
Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
#22
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Quote:
The cargo area of a wagon is like a boom box. It can amplify noises; especially suspension and/or road noises. So even a small noise is magnified. As Mike suggested, the cross-bars on the roof rack can also make odd noises, especially with the sunroof open.
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Current Benzes 1989 300TE "Alice" 1990 300CE "Sam Spade" 1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007) 1998 E320 "Orson" 2002 C320 Wagon "Molly Fox" Res non semper sunt quae esse videntur My Gallery Not in this weather! |
#23
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The rear wheel bearings on the wagons are double row which means on a practical basis that the bearings will last a very long time after the noise starts before failing. To check the bearings, jack up the rear of the vehicle and alternately pull on the top and bottom of the tire to check the play. If the bearing is bad there will be substantial play. Also, the bottom of the outer brake pad and the top of the inner brake pad will wear considerably more than vice versa. The right wheel bearing on my 91 300TE was bad from about 130K miles until I replaced it at 170K miles with no ill effects other than premature rear brake pad wear and rear tire wear. Mark
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#24
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my '87 wagon we had a very similar sound. it somehow coincided (or so i thought) with installing new snow tires so i put it down to the tires and lived with the sound for most of a winter. then changed to summer tires and i knew immediately that i was wrong about it being from the tires and investigated and sure enough it was rear wheel bearings.
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