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Rear leaf spring torque info

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Old May 5, 2018 | 06:58 AM
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Rear leaf spring torque info

Does anyone have the torque specs for the 2017-2018 srw f250/f350 rear axle- leaf springs, u-bolts, shocks, etc? Thanks in advance!
 
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Old May 5, 2018 | 09:06 AM
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Since no one is answering.... I would reference a previous year, where the knowledge is abundant. I would be impressed if the torque values changes.

Even if they did, you'll be safe.
 
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Old May 5, 2018 | 09:20 AM
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Ok. Well I was afraid something changed with them with the new frame and beefier axle options.
 
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Old May 5, 2018 | 09:30 AM
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From: IA/GA/HI/FL/VA/CA/ME
There are a couple posts for lowering the rear end where someone posted the torque specs.
 
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Old May 5, 2018 | 09:47 AM
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From: SE CT
Upper Shock Nut......52 ftlbs
Lower shock Bolt/Nut......111 ftlbs
Spring to Frame Bolt/Nut (front)......490 ftlbs
Spring to Shackle/Shackle to Frame Bolt/Nut......173 ftlbs
Ubolts F250/350 Single Wheel Cross Pattern:
1st Pass......48 ftlbs
2nd Pass......96 ftlbs
3rd Pass......148 ftlbs
4th Pass......195 ftlbs

F350 Dual Wheels Cross Patern:
1st Pass......74 ftlbs
2nd Pass......148 ftlbs
3rd Pass......221 ftlbs
4th Pass......295 ftlbs
 
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Old May 5, 2018 | 09:51 AM
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There ya go. ^^^


Honestly from an engineering perspective, torque values are based on the hardware, not the parts. You can have all beefier axles if you want, but if it's the same U bolts/nuts holding it on, the torque values won't change.
 
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Old May 5, 2018 | 10:18 AM
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"Tight as hell" is usually my default torque setting on suspension components
 
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Old May 5, 2018 | 10:27 AM
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Originally Posted by briangp
There ya go. ^^^


Honestly from an engineering perspective, torque values are based on the hardware, not the parts. You can have all beefier axles if you want, but if it's the same U bolts/nuts holding it on, the torque values won't change.
Yeah, I figured with larger axles, etc, there would be larger hardware, I guess was my point. Didn't want to follow old torque specs if that were the case.
 
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Old May 5, 2018 | 10:28 AM
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From: NC
Originally Posted by Towerhog
Upper Shock Nut......52 ftlbs
Lower shock Bolt/Nut......111 ftlbs
Spring to Frame Bolt/Nut (front)......490 ftlbs
Spring to Shackle/Shackle to Frame Bolt/Nut......173 ftlbs
Ubolts F250/350 Single Wheel Cross Pattern:
1st Pass......48 ftlbs
2nd Pass......96 ftlbs
3rd Pass......148 ftlbs
4th Pass......195 ftlbs

F350 Dual Wheels Cross Patern:
1st Pass......74 ftlbs
2nd Pass......148 ftlbs
3rd Pass......221 ftlbs
4th Pass......295 ftlbs
Thanks for the info!!
 
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