hello community..
i have a 1985 300d, and i have replaced the 2.88 differential with and quieter 3.07 and need to calibrate the speedo to match. what are the numbers that need to be on the face of the speedometer? i have included a photo of mine, though they are wrong (the speedo that is).

thanks. chris

in case you cant read them....123 542 27 57

Attached Thumbnails

 

can anyone help?
thanks

Why is the 3.07 quieter?

__________________
"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."

according to my notes, you want the part number ending in 67 01. i may have a spare if you need one.

__________________
'77 240D, 504H, OM617.952, etc.

Where are you located, I am interested in you old 2.88 diff and matching spedeo.

__________________

I'm confused. Why would the speedo be different when (at least for any other make of car I know) you just change the speedo drive gear in the trans? It doesn't make sense to me to have different speedos to accomplish this calibration.

Dan

I also want to know why the 3.07 is quieter...

was there something wrong with your 2.88?

the 2.88 is coveted for it's economy, and silence at 70+mph... if yours isn't damaged, you could easily sell it if you wish.

__________________
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!

nope.

the MB calibrates the speedo to the diff. all transmission drive gears are the same.

__________________
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!

Is there a way to swap over the drive gears in the speedometer itself to another one? My brother is wanting to go to the 2.88 in his W116 300SD but there isn't much info on calibrating the speedo on the W116.

__________________
Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

A quick way around this is - use a sat nav or gps to get the right speed .Remove the speedo lift the pointer over the end stop ,and move it a little at a time,anticlockwise.Then you can see how far it is from the right speed on the road ,trial and error. You should get it right.

how similar is the 116 speedo to the 123? could you use the 123 speedo in your cluster?

swapping the gears would only fix the odometer... the speedo is a slip effect design, so you'd need the entire mechanism...

__________________
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!

If you want a 120mph speedo with a matching face as your original. You'll need a 123 542 18 57 from a 1983 model year or a 123 542 28 57 from a 1984 model year vehicle.

__________________
1983 123.133 California
- GreaseCar Veg System

You can swap speedo gears and possibly mess with the magnet and spring a little bit. But acquiring the matched gears are a bit hard because closes would be a 2.65 ratio from a w116.

If you are able to get gears that are close, here is what I've done in the past.

http://www.peachparts.com/shopforum/diesel-discussion/238488-backyard-speedometer-adjustment.html


.

__________________
1983 123.133 California
- GreaseCar Veg System