spdracer said:i got 4.10's.... and got the speedo gear from ford
DropTopPony said:i don't think Ford makes a speedo gear for 4.10...how many tooth is it?
you can set the speedcal to calibrate from the gear you have....you install the speedcal then drive on a highway for 10 miles...having someone in a stock car clocking you then copy the miles your car did. For example you might have clocked 12 miles instead of 10...then you go onto the speedcal forum and tell them what your milage was on the 10 mile test and they will give you an exact setting to install.LI98GT said:with my recent install of 3:90s, the shop put in a new gear, to get it close - I believe it was 23 tooth gear, but now don' t know how to set the settings for the speedcal since the stock gear isn't in there anymore. Do you guys think I now need to install a stock gear, then can use the settings in the documentation to get things right again or closer anyway? Ugh, I told the shop that I had the speedcal ready to be installed, but they went ahead and changed the speedo gear anyway.
this leads me to believe you didn't read our replies or you would have seen we mentioned it by name specifically so you could look it up.spdracer said:whats this speedcal???