1983 300cd. W123 model. Minimal Rust. 205,000 miles. Cream. Black leather interior. Auto transmission swapped out 4-speed manual. New injectors, chain, radiator, front end components, shocks, steering box, clutch, rebuilt turbo. Differential from an '85 model. Charged A/C. Serviced. Good tires. Euro bumpers front + rear. Rear windows are manual. Fun to drive. Needs new trunk lock. Spare engine if you want one. $6,000.

Just curious. What is gained by the diff swap?

The 85 is supposed to be shorter. I forget the ratios but a fraction less engine speed for a given road speed. It turns over at 3000 at 80mph instead of 3,300....

2.88 in the '85 diff, versus probably a 3.07.

It will make a non-85 car slower off the line (since it doesn't have the '85 tranny with taller 1st) but it will have lower RPMs on the highway.

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter