I might be purchasing a parts car to do a transmission swap. It's a 1984 190D 2.2 5 speed (w/o overdrive). Question is, if I do the full swap, including the rear subframe so I have the diff that matches, will I need to modify my speedo so it is correct or can I use the one from the parts car? Or, what would it be like if I don't swap in the manual rear subframe and diff and just leave the factory diff in mine?

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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.

If you have the parts car, then use the speedometer from the car that the differential come from. Then all problems regarding the speedo are gone.

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Junqueyardjim
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1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
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