Whats rear lock mean??
Hi bferringer. A quick call to your local Ford service bay should get you an answer about the rear lock. It probably has something to do with your differential (for more info: http://www.car-videos.com/whatis/differential.asp). Otherwise, here's a troubleshooting guide to tranny issues that should help you narrow down the possibilities. Hope it helps, good luck! http://www.procarcare.com/includes/content/resourcecenter/encyclopedia/ch21/21TSautotranny.html
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