I have an '82 SD with 106,000 miles. As far as I know the rear end differential fluid has never been changed. Is there a recommended service for this and at what interval?

when I bought my 1981 240D with a manual trans, I had the transmission and read end changed. That was last April 2006. I did keep an eye for leaks right afterwards. Never saw any leaks.

Just last week, I had the transmission and rear end changed again. Again, I check after a long hot drive and when I park in our driveway, I look for new leaks, and nothing. Diesel engine has a very slow leak, not much, and only need to use 1 qtr per 3-4 thousand miles.

I have a 1984 Isuzu P'up 2.2L Diesel,that I got new, and now has over 512,000. I have changed the transmission and rear end once a year and never had a problem.

I would say once a year maybe an over kill, but I would every two years.

Bob
1981 240D 4 speed manual

What kind of fluid or oil Dino or syn???

NOW!

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5

I have to agree with odie, now would be good.

When my '91 was about 4years old I had the stealer change the fluid in the diffs. They told me that they don't ever change diff fluid, I had them do it anyway.

Although the fluid makes a pretty good lubricant for a very long time, and the magnet should collect any ferrous contaminants, moisture from condensation etc. will eventually get into the fluid. Pretty cheap, a small amount of fluid, I figure it's good for 4-5 years unless there's some reason that it might have gotten contaminated.

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Gone to the dark side

- Jeff