Speedometer calibration after 4.11 swap

[joeaxial]

I've got my 4.11 trans and rear differential swapped into my 1992 SVX. Everything works great, but I've found that my speedometer now reads about 10% faster than my actual speed. Has anyone come up with a solution to this problem. I'm not so concerned about the inacurate reading on the speedo, but I don't like the idea of clocking up 1.10 mile on the odometer for every mile I drive! If any of you SVX geniuses has come up with a fix for this, I'd appreciate hearing about it.
Thanks A Lot
Steve