Having the wrong rear axle shim is putting the u-joint at a dangerous angle (nearly 8°), which is contributing to the noise & vibration in the cab.
FPG $55 x2 plus sh plus tax new Ford shim F3TZ-5729-A
JBG $29 x2 plus sh plus tax new aftermarket shim
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Ford specifies that the leaf spring u-bolts not be re-used.



JBG $28 plus sh plus tax new aftermarket U-bolt set (4 bolts 8 nuts)

Owner caption August 2021 · Photo 92 of 130