* Check the vehicle's specifications sticker: This sticker, usually located in the driver's side door jamb, might list the axle ratio.
* Look at the axle housing: The ratio is often stamped on the differential housing itself. You'll likely need to get under the car to see it.
* Consult your owner's manual: If you have the original owner's manual, it should specify the axle ratio.
* Check the build sheet: (If available) A build sheet provides detailed information on the car's specifications from the factory.
Without checking one of these sources, it's impossible to definitively state the rear axle ratio for a particular 1993 Pontiac Trans Am.
