Lamahs approve of manuals
Join Date: Mar 2003
Location: Sydney, Australia
Re: EF Dash Diagnostics
If you've changd your diff ratio, you should simply need a new speedo gear to put into your gearbox - This should fix it right up.
If you've got an oddball ratio that wasn't Ford oem to something, you might be in trouble and need something else. But if its 3.45, 3.23, 3.03 and the other lower ones, you should be right. I think the gears range from about $10-$30 (its random).
And yes, both will be getting speed from the speedo transducer / gear...