Senior Leigh on Using the Differential as a Jack Point
I've used the diff many times... makes lifting the rear easy. It helps having a low-profile jack to get to it. My two jacks are a Harbor Freight Daytona (original) and an AC Hydraulics DK13HLQ.









This one ...........
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Thanks for the concern and yes, I value safety above all else.
I called it DIY because I spec the material and measurement to my needs and have a workshop do the cutting and welding.
I do not need to do a lab test on it based on its work load which is 1,300 pounds max for the heaviest side, which are: each of the front wheel with me in the car and...... without earthquake.
I know it will do well easily up to 400% of that or 5,200 pounds per DIY unit, based on eccentric loading ( the unfriendly loading
)The steel is ASTM A53 grade B with yield strength 35,000 psi / 240 Mpa. Elastic modulus is 200 Gpa.
I am very cautious when doing lifting or when supporting the lifted object above ground.
Hauling up/down yachts from and to mother vessel and/or shipyard and setting up keel supporting blocks on shipyard, since the 90s have taught me a lot.
4 of these DIY wheel supports combined use, is way stronger than my Quick Jack and safer in a "failure" mode , than the Quick Jack.
I usually use these DIY wheel supports as back-up when using Quick Jack , so if Quick Jack pin/s or latch or hydraulic cylinder failed,
the wheel would still be caught at 18 cm above ground and that means ample ground clearance under the car to prevent a mishaps....touch wood.

https://www.raceramps.com/garage-service/cribs/c/cribs/




