If 4.10's are the only thing you need calibrated for then I'd suggest a speedcal. Much much cheaper than a handheld tuner if you don't hjave a bunch of mods and don't want to bother with having to deal with a shop.
Speed cals don't work on auto trans from 99 and up. At least I think its 99 and up. Just a warning in case you don't have a manual trans.
Note: The Dallas Mustang Speedcal will only work with 1994-2004 manual transmissions and 1994-1998 automatic transmissions. This gear kit is for the 8.8" Ford Rear End.
Speed cals don't work on auto trans from 99 and up. At least I think its 99 and up. Just a warning in case you don't have a manual trans.
At least thats what everyone has told me. I have an automatic V6 and I put an 8.8 in with 3.55:1 gears and my spedo has been off ever since. I'm not going to buy a tuner just to correct that, it costs WAY too much. I looked into a speed cal but I was told it couldn't be used with my auto trans be several sources.
Looked it up:
http://www.americanmuscle.com/speedcal-373-gear-oil-kit.html
First time I've ever heard that from anyone. I'd love an explenation when you are not tired
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