What type of fluid or lube is everyone using in the rear axles after boot replacement? Would like to be able to use something available locally and not have to use the MB dealer. Thanks.

If you do a search on rear axles or something like that you should find plenty of discussion about the best grease.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

On my 1984 300SD, I believe there was 90cc's of oil in the boots. I replaced the boots with the Astoria boots and used their grease. After long runs with the car I hear a clank clank from what appears to be the cans on the CV joints. I am thinking of removing the larger clamps and squirting in some 90 weight differential oil in there to see if the noise is eliminated.

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Gary
OBK #37

Go to the dealer and get the right stuff... Or better yet, get it from Phil.

No sense in thinking you're smarter than the MB metalurgists who designed the parts. In another similar thread, I asked Kestas to weigh in, as he knows this stuff as his day job, but he didn't have an answer. Based upon that, if a super-knowledgable engineer doesn't have an immediate answer, Im not going to recommend anyone else go play chemist...

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)

Heavy oil is my choice. Mercedes used it until they started to use grease eventually. The reason I favor oil is I have seen grease displaced in front cv joints to the extent one would think them partially dry. The mercedes rear joints on 123s were oil filled when new I believe. That in my opinion was one reason they lasted so well.

If the boot seals can be trusted to hold liquid oil in, I'd throw gear oil in there. 75w90 or whatever the standard is.

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~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL