For 25 years plus, I have carried a 20T bottle jack, placed under the Ubolts holding the springs to the axle, never had an issue and I use on the truck as well if needed; easier to use than the OEM jacks that have come with my trucks.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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