I have a 300SD 1985 that now has 409,000.0 miles on it. It has some issues like, a leaking moon roof that is taped up, a window that likes to open about an inch or more, bad radio. Needs tires.

Just had a run in with a deer and lost all my pass lights. Broke a vac line, but fixed that with some epoxy. Lights are on order

So, I see an 84' 300SD up for sale and wonder if things are pretty much the same on the vehicles?

If i purchase the 84, can i use the 85 for parts?

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1985 300SD

Rear diff in the 85 is 2.88 gearing.

Others are 3.07.

That's all I know because I don't have one.

The 1985 has a different transmission and torque converter, rear end ratio, as well as the vacuum amplifier for shift pressure.

All the body parts are the same.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.