IF the owner ever took the car to a "quick change" oil shop, and got sold by the guy holding a dirty rag in their face saying "your differential oil is dirty" then who knows what it was filled with.
On Sun, Jun 11, 2023, at 13:19, G Mann via Mercedes wrote: > Question: > What oil have you used in the diff's that failed? > Ring and Pinion gears are held in strict position by properly shimmed > bearings. As long as that strict position is maintained, they will run > silently. As soon as shim or bearing wear happens the relationship of Ring > to Pinion shifts, and because it is a complex gear cut relationship,, they > start to make noise and failure is in their future.. because once a bearing > fails even a little, it is on par with being "only a little pregnant.." > It's is going to get more out of tolerance.. > I posit the base cause of failure lies with bearings.. likely pinion > bearings, since they are smaller and more highly loaded.. further, properly > lubricated bearings seldom fail and last a long time, thus, my speculation > is, the culprit in this serial failure could be lubrication used was not up > to the task it was given... > Just my thoughts on the subject.. yours may be different.. > > > On Sat, Jun 10, 2023 at 9:52 PM Karl Wittnebel via Mercedes < > mercedes@okiebenz.com> wrote: > >> The original differentials in the 85 wagon and the 88 560sel both started >> to make progressively louder whirring sounds, so they were on their way >> out. I replaced both. Wagon had about 211k on the clock and the 560 99k. >> Not nearly the hundreds of thousands others seem to get. >> >> Replacememt on 560 locked up within a few hundred miles with new oil. >> Diff#2 was loud from the start and had a lot of klunk on downshifts and >> into reverse. Diff 3 is in the car now and is much quieter, so maybe it >> will go for awhile. >> >> Wagon is a longer story. >> >> If I replace the valve cover gaskets on the 560 it should be leak free for >> awhile. >> >> K >> >> On Thu, Jun 8, 2023, 9:09 AM Randy Bennell via Mercedes < >> mercedes@okiebenz.com> wrote: >> >> > On 07/06/2023 1:46 PM, Karl Wittnebel via Mercedes wrote: >> > > Has anyone else run into a serial differential swapping issue . . . but >> > then the replacement on the wagon seems to have blown a seal >> > > and is trying to seize up while the 560 locked up tight on the 405 >> > > yesterday >> > >> > Is there enough play in the bearings on the wagon to have caused the >> > seal to leak or did the seal just get old and the rubber get harder? >> > >> > Was there evidence that the seals were leaking on the 560 as well? >> > >> > Running out of oil is no doubt going to cause major differential failure >> > no matter what brand of vehicle. >> > >> > Randy >> > >> > >> > _______________________________________ >> > http://www.okiebenz.com >> > >> > To search list archives http://www.okiebenz.com/archive/ >> > >> > To Unsubscribe or change delivery options go to: >> > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > >> > >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
