Author Topic: Which W108 Swing Axle Has The Best Ratio For Use In A W111?  (Read 29 times)

Squiggle Dog

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My roommate has a 1965 W111 220S and the rear axle is leaking badly. We know a guy who has a bunch of W108 parts cars he wants to get rid of, so we were thinking of installing a disc brake rear axle and larger brakes up front.

What gear ratio would be ideal in this car? It came with a 4.08, but wonder if something with a lower gear ratio would be better. But, I also don't want it turning it into a slug.

I've got a 1965 W111 220. The early ones had a 3.92 rear axle, and the later ones had a 4.08. The front half is a 1965, and the rear half is a 1960 (made from two cars cut in half and welded together). It will be interesting to see what axle is in it.

I plan on installing an OM617 5 cylinder turbo diesel engine in my 220, and plan to convert to rear discs as well. I figure on that car that a 3.27 ratio axle would be the best that I find. Any thoughts? I'll be using a 4 speed column shift manual transmission from a fintail.

I've also been trying to find out what gear ratios the different W108 models came with.
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1967 W110 230 Universal Wagon Project
1980 W116 300SD Turbo Diesel 346,000

Squiggle Dog

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Re: Which W108 Swing Axle Has The Best Ratio For Use In A W111?
« Reply #1 on: July 01, 2020, 12:39:32 AM »
I checked my roommate's 1965 W111 220S and my 1965 W111 220, and they both have 4.08 rear axles. If I get a rear axle from an air suspension car, is there any reason why I can't install the gear set into a spring suspension axle? For example, swapping a W109 gear set into a W108 axle?

I think we're going to keep the stock setup in my roommate's 1965 W111 220S. The pinion seal leaks and the boot is aging, so I'll probably replace those. But my 1965 W111 220 is going to get an OM617 5 cylinder turbo diesel engine, and the gearing on the cars they came in ranged from 2.88 to 3.07, so I'll want something more appropriate to the engine.
Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 17 years ago. https://challenge22.com/

1967 W110 230 Universal Wagon Project
1980 W116 300SD Turbo Diesel 346,000