Better gear ratio for W123 Diesel – What axle would fit ?? - PeachParts Mercedes-Benz Forum

#1 11-16-2008, 09:10 AM

You can always get the speedo from an 81 300TD. Since its an electric drive (the only one in the W123 line for some reason...) it should be much easier/cheaper to alter it.

lutzTD · #2 11-16-2008, 11:33 AM

Quote:

Originally Posted by ForcedInduction

You can always get the speedo from an 81 300TD. Since its an electric drive (the only one in the W123 line for some reason...) it should be much easier/cheaper to alter it.

in all of my yard prowls to date, I have never seen an MB wagon. what about a later model speedo after 85? arent those also electronic? has anyone made a sender for one?

DeliveryValve · #3 11-16-2008, 12:48 PM

Quote:

Originally Posted by lutzTD

in all of my yard prowls to date, I have never seen an MB wagon. what about a later model speedo after 85? arent those also electronic? has anyone made a sender for one?

You can try to modify a 380SE speedo to fit in your car. Forum member Apotheoun did a version of this with his 300SDS had it done with his 4 speed conversion with magnets.

Quote:

...... There is a lot of thought planning and measuring twice involved before cutting. You will need to invent or create a home made rotational electronic pulse signal generator to run the speedometer, odometer, and cruise control, or you will have nothing to read on the dash.

This is the case with my conversion, which was finally made right. It formerly utilized a poorly hooked up 240D speedometer that was horribly inaccurate, and now it has a correct 300SD speedometer. To make it work though, Kurt had to invent a new signal generator by welding four magnets onto the drive shaft and attaching a nearby sensor, completely hand wrought. It works great, but nearly self destructed in the first two miles due to faulty clearances. The magnets are still bent over from the initial snafu, but work just fine. What a noisy racket that made!

lutzTD · #4 11-16-2008, 01:45 PM

Quote:

Originally Posted by DeliveryValve

You can try to modify a 380SE speedo to fit in your car. Forum member Apotheoun did a version of this with his 300SDS had it done with his 4 speed conversion with magnets.

yeah, not sure this will work for me, the 300CD uses a mechanical pickup for the cruise control and I would rather not lose that.