Where does the CSL take its speedo reading from?

[Mike RT4]

Just wondering for future reference, as one of the things I have found is that the standard final drive is just so LOOOOOOOOOONNNGGGGGG, that it really dulls the performance. So was wondering how the speedo would be affected by fitting a 3.9 final drive? For example, if it was in the gearbox, then it would under-read with this diff, but if it went off wheel speed, it would be fine .

Thanks in advance .

[_Nathan_]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

[Mike RT4]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

Thanks Nath :beer:.

[hoshy]

You're in the BMW world now... they'd never do anything so silly as using the box for speed signal.

[shimmy]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

I'm not sure how you know that coz it never moves from Lydney!!!

[_Nathan_]

Mainly cause I got the pin out and CAN info for the ABS unit

New suspension now in the same room as the car, almost got enough parts to put it back together now

[shane@mbtech]

NSR wheel speed sensor.

Undo that and your speedo will not work.