Sadly, despite the fact that this is one of the most frequently discussed subjects in relation to jacking up cars, everyone appears to have a different suggestion for what you “should be doing.” If you ask your friendly neighborhood mechanic, he’ll undoubtedly admit that he frequently presses a floor jack up against the differential. To determine which elements of a car or truck can withstand the force of the jack, he depends on expertise.
Others will just advise you to consult your owner’s manual or get in touch with the car’s manufacturer. Technically speaking, that’s a really good response. Why? It doesn’t follow that something is unquestionably safe just because it is probably safe. The tire shop workers are undoubtedly acting safely when they lift a car by the differential. Similarly, if you perform the same task at home using a reliable hydraulic jack, you are likely acting safely.
You are surely being safe if the differential is listed as a recommended lifting point by the manufacturer of your car. Your handbook, however, most likely instructs you to lift from the pinch weld or frame. If in doubt, refer to the book!
How long can a Tacoma be driven on a spare tire?
Space-Saver (Donut) Spare Tire Speed limits for space-saver spares are 50 mph. Over 70 miles should not be traveled on them.