Speedometer adjustment?

[vpilarrt]

P/N is stamped on it. Compare it to bmwfans or realoem.

[henryki]

You sure you don't have the 4 cylinder module in your cluster instead of the 6 cylinder?

I'm honestly not sure, how could I tell? The cluster I have is a motometer and the redline is at 6500 rpm, whats the difference between the M42 and the M20 gauge clusters?

And thankfully my buddy is parting out a sedan that is the same year and has an M20 and 5 speed just like mine, and he still has a cluster, but I'd like to try and see if it's possible to fix this one before buying another cluster.

[vpilarrt]

You sure you don't have the 4 cylinder module in your cluster instead of the 6 cylinder?

[henryki]

So my speedometer is clearly off in my car, and I've had to judge my speed based off of my RPM and what gear I'm in, for example in 5th at 3,000 RPM I'm doing (give or take) 70 MPH. But my speedo indicates 95.

Also my MPG gauge doesn't work properly, when I let off the gas it shoots up to 40 mpg's and when I barely touch the gas it goes straight to 0, my odometer gears are out as well, would that have anything to do with it?