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-AJBG $29 x2 plus sh plus tax
new aftermarket shimIF THE IMAGE IS TOO SMALL, click it.
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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) 
![3susprshim.jpg 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 [url=https://www.fordpartsgiant.com/parts/ford-spacer_f3tz-5729-a.html]F3TZ-5729-A[/url]
JBG $29 x2 plus sh plus tax [url=https://shop.broncograveyard.com/1978-1996-Ford-Bronco-Rear-Spring-Angle-Block/productinfo/33266/]new aftermarket shim[/url]
IF THE IMAGE IS TOO SMALL, click it.
[url=https://www.supermotors.net/registry/media/265031][img]https://www.supermotors.net/getfile/265031/thumbnail/rearsusp.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/1024311][img]https://www.supermotors.net/getfile/1024311/thumbnail/shimsbaxle.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/816251][img]https://www.supermotors.net/getfile/816251/thumbnail/drivelineanglesguide.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/170144][img]https://www.supermotors.net/getfile/170144/thumbnail/ujoint-motion.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/284976][img]https://www.supermotors.net/getfile/284976/thumbnail/dshaftsujoints.jpg[/img][/url]
Ford specifies that the leaf spring u-bolts not be re-used.
[url=https://www.supermotors.net/registry/media/576546][img]https://www.supermotors.net/getfile/576546/thumbnail/springsr.jpg[/img][/url]
JBG $28 plus sh plus tax [url=https://shop.broncograveyard.com/1980-1996-Ford-Bronco-U-Bolts-Stock-Length-Set-of-4/productinfo/33282/]new aftermarket U-bolt set (4 bolts 8 nuts)[/url]](https://www.supermotors.net/getfile/1166764/fullsize/3susprshim.jpg)