yes, the speedo's are model specific for the 123 chassis.
the 240 speedo's ALL are geared for a 3.69 rear diff.
the 300 non turbo's are all geared for 3.46 (unless it's a manual trans, then I don't know)
the 300 Turbo's up to 1984 are geared for a 3.07 diff,
in 85 the turbo's got the 2.88 Diff.
the one anomaly is the 81 Wagon. it's got a electronic driven speedometer, and is only useful on that vehicle.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

THat was due to Mercedes using the 617.951 from the 'SD, right? Is this only the case only for wagons?

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Actually there is a difference I have noticed between the speedos for an automatic car and a stick car with the same engine. The maximum rpm hash marks on the face are a little lower on an automatic equipped car due to I presume, slippage. ... one or two mph, IIRC.


Not enough to worry about.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

this is a good point, obviously the shift points are going to be different between a slipping power hogging auto and a direct drive manual. but the rear wheel speed to speedo speed should be acurate.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

My '84 Euro non-turbo 5-speed 300TD has the 3.46 rear, but some PO replaced the original speedometer with the wrong unit - I suspect from a turbo model - so it now reads too fast. I got a speedometer in the Pick-N-Pull from an 84 Euro non-turbo automatic 300D. So hopefully, except for the shift-point hash-marks, the readings will be correct.

Happy Motoring, Mark

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DrDKW

Correct.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

no, it's because the 722.3 was only set up for the SD at the time, the engine is still a 617.952 (the first vehicle to get that variant .952 I think...) the NA vehicles all got the 722.2 trans...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!