Speedo wiring and recalibration
I'm putting the engine/trans from a '86 560SEL into my '72 350SL. My '72 speedo used cable drive, but the '86 trans has no cable gearing, just what looks like a Hall effect sender.
I've ordered a used speedo from a 560SL (so it will fit in my SL's gauge cluster), but I don't know what wiring is needed to connect the Hall effect sender in the trans to the 560SL speedo.
Once I get it wired correctly, I'll also need to know how it can be recalibrated since my rear end ratio is 3.07:1 rather than the 2.47:1 that was in the car the transmission came from.
Thanks in advance,
M D Nugent