When Pat Rego wanted to add power seat capabilities to the driver seat in her '89 "Seven Up" convertible, she didn't have far to look for expertise. Her husband, Merv, is not only her life partner but also her partner in Classic Creations of Central Florida, a Lakeland shop that specializes in vintage and Fox Mustangs. When Merv learned that replacement power seat assemblies sell for more than $400 from Ford, he decided to repair a used assembly that was left over from a previous customer repair.
By hooking a power seat switch to a battery, Merv was quickly able to determine that the motors (one for back and forth, another for up and down) still functioned. However, the plastic gears in the forward/backward gear assemblies were stripped, so while the motor worked, nothing moved. This is a common malady with Fox-body power seat mechanisms, usually caused when the seat tracks bind due to a lack of lubrication. An Internet search turned up Two Men One Garage, a company that offers power seat components for '87-'93 Mustangs, including replacement gear assemblies for $75. It's a basic R&R procedure. However, because the replacement gear assemblies are slightly larger than the factory unit, some minor modifications are required.