My TD (1987) also reads the wrong speed. This is because the Carrier (Differential) has been changed to a different gear ratio. It's tough finding a used/rebuilt Carrier for the 1987, so I had the Indy put one in from a 1987 sedan.

Is there a way to adjust the Speedo/Odo to make it read right??

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www.jerseyplanning.com
1987 300TD 440K - My car
2005 Jeep Grand Cherokee Laredo 107K - Tim's car
2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car

rear hatch ,has 3 or 4 mb wagons ,milton motors ,713-694-7933

In stock configuration my speedo was 7% fast and the odo was correct.

Now my odo is 7% short, but my speedo is correct. Best part is, my rpms are 7% lower on the highway now.

Taller tires...poor man's re-gear. You just have to remember to adjust the miles or your fuel consumption calcs will be bad!

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2009 VW TDI Jetta Sportwagon 172k miles (rear-ended harder than Elton John on 8/4/13. Total loss)

1991 Volvo 240 142k miles (T-boned by a stop sign runner. Total loss)

I wouldn't say I am Always here... I do eat and sleep...sometimes I even work.
of course, I work on the internet, so...
John

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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!