This auction is for a new old stock factory Ford 1984 - 1990 Ford Escort and Mercury Lynx Ford Tempo and Mercury Topaz with MTX Manual Trans and 4 Pinion Differential - Differential Shim.   This is a genuine Ford original replacement part, No longer in production from Ford and not usually saved when these cars were parted out so it is a great addition or spare for anyone's restoration project.  Brand new, Obsolete from Ford and hard to find.  Nothing beats the quality and fit of a genuine Ford part for your restoration.  Feel free to ask any questions.