While many high-performance Ford models *optionally* offered a Traction-Lok (Ford's brand name for their limited-slip differential) in a 9-inch rear end, it wasn't standard equipment on most.
To say definitively which cars came *stock* with a 9-inch and a limited-slip is difficult without specifying the exact year and model. However, cars where it was a *common* option (and thus likely found in some stock vehicles) include:
* High-performance Mustangs (various years): Especially Shelby Mustangs and Boss Mustangs were frequently equipped with the 9-inch and a Traction-Lok. But again, it wasn't always standard.
* Ford Galaxie (certain years and models): Some higher trim levels and performance packages might have included the 9-inch with Traction-Lok.
* Ford Fairlane (certain years and models): Similar to the Galaxie, performance options could include the combination.
* Ford Torino (certain years and models): Again, availability depended on year and options chosen.
* Certain trucks (heavy-duty models): Some heavy-duty trucks utilized the 9-inch, and limited-slip was a more common option in these workhorse applications.
In short, you'd need to specify the exact year, make, model, and trim level of a Ford vehicle to know for certain if it came stock with a Ford 9-inch differential and a limited-slip. It was a popular *option* on many performance vehicles, but rarely a standard feature.
