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Re: Jacking safely for flat tire change
The GM screw jacks are awesome. They are slow but they are just for flat changes not vehicle maintenance. I think I have one on the utility box of 2 or 3 trailers because they work great for that as well.
On the later model 2x4 Jack, it has a "hook" that comes off the top plate of the Jack. This effectively lowers the point at which it can attach to the truck. This hook goes underneath the control arm on the front which can lift almost from ground level even where the Jack won't fit.
The top of the Jack can be used in the rear on either the axle tube or the frame. It can also be used on the frame in the front.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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