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#1
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W114 280E Rear Axle
My 114 280E has begun to develop a rumble from the rear diff along with a whine, both really only noticable under load. So I'm suspecting carrier or rear pinion bearing failure.
Can someone advise how the preload is set on these? Shim or threaded nut? I'm trying to determine if it's a job I can do at home. btw I've spent 22 years as an auto tech so I've got reasonable knowledge/skills but if there's special tools etc required, it may be best to either get one from a wrecker or get a shop to do the work. Many thanks for any info..............
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Tony 76 W116 280SE 74 W107 450SLC 88 W124 300E 82 W123 280TE |
#2
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Double check the rear flex joint. I just went through this with my '73 280. I would have sworn the differential was going bad. Classic symptoms, rumble under load, whine on decelleration, vibration when vigorously applying the brakes, clunk when brakes were first applied, etc.
Turns out the threads on one of the bolts securing the flex joint to the diff was worn. It tightened but just to the ends of the usuable threads. It felt tight but it was not securing the disk. I replaced all three of the bolts and problems went away. |
#3
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Thanks Mike
Definitely something to check and I wouldn't have thought of that. I just saw some pics of the damage cause when the flex disc failed, so I had planned to replace it anyway, but I think I'll check it out first. Thanks a lot!
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Tony 76 W116 280SE 74 W107 450SLC 88 W124 300E 82 W123 280TE |
#4
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Pinion nut tension
One idea is to punch side-by-side marks on the nut and the nearest reference point.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old |
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