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How to install Prothane Transmission Mount on your Mustang

Installation Time

2 hours

American Muscle
Shop Parts in this Guide


1. Prepare the new transmission mount for installation by installing the provided studs into the new mount. Thread the stud in by hand until it's snug. Then using the supplied nuts, double-nut the stud and securely tighten in the mount. Repeat for second stud. (See Diagram Below)

2. Bolt the mount to the transmission using the original hardware, but do not tighten.

3. Align the transmission/mount with the crossmember. First tighten the bolts that hold the mount to the transmission to factory specifications.

4. Install the flat washers, lock washers, and nuts in the proper sequence using the diagram below for reference. Tighten the nuts to 50ft-lbs.

This guide applies to Vehicle years: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 and Submodels: Foxbody, V6, GT