Thanks for the replies.

I know it's always a crap shoot and even though the maintenance record is very good it ends at 200K so who knows. Since I know so little about these transmissions I wanted to be sure there wasn't some hidden "gotcha" or "they all do that" issue.

Skippy - I'm getting some resistance to that idea but it's my preferred approach. I guess I'll run it and be ready for a swap if it lets go!

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1969 220D 5 Speed (OM616)
1983 240D 4 Speed
1985 300D Auto 376K
1985 300D Auto 275K