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leaf spring center bolt torque

Discussion in 'Suspension' started by 09sr5, Dec 22, 2012.

  1. 09sr5

    09sr5 [OP] gonna be a long ride

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    East Tennessee
    Vehicle:
    2009 sr5 2.7 4x4 AC
    265/75 AT3's on stock wheels. 5100's@1.75". Trail Gear sliders. Toytec AAL
    Does anyone know it off hand? Fixing to start on my aal. Its an 09 model. Thanks!
     
  2. nfs257

    nfs257 Well-Known Member

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    Chris
    San Diego
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    09 DCLB PreRunner MGM SR5 Debadged
    Rear cage and longtravel dmz kit. 16" triple bypass shocks. Front under construction at Trac Performance.
    No torque spec just tight. Look at chris4x4's write up and there are specs there except for that bolt.
     
  3. hetkind

    hetkind Well-Known Member

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    Howard
    Johnson City
    Vehicle:
    2011 SR5 Access Cab
    bilstein set at 1.75, Racho 5000 rear with 4 leaf kit, floor mats, high lift jack, pull hook in hitch, bed rail corner braces, severe duty brake pads and devil horns on the grill....
    Usually that is about a 3/8" diameter bolt, but hardened and threaded all the way through. I would say about 50-60ft/lb. NO antiseize since removal will probably require grinding or torching.

    Or in laymans terms, two grunts and a fart. You want it tight enough to compress all the leaves together firmly, with just a little stretch. The nut will strip long before the bolt does.

    A couple of C-Clamps often helps it get started and remember, cut off the excess with a hacksaw or abrasive wheel, careful not to take the temper out of it.

    I have been building spring packs for decades.

    Howard
     
  4. 09sr5

    09sr5 [OP] gonna be a long ride

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    East Tennessee
    Vehicle:
    2009 sr5 2.7 4x4 AC
    265/75 AT3's on stock wheels. 5100's@1.75". Trail Gear sliders. Toytec AAL
    Alright thanks guys
     
  5. 4WD

    4WD cRaZy oLdmAn

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    Doug
    Gardnerville, Nevada
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    No Truck
    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now
    Around 50-55 ft lbs IIRC
     
  6. atvlifestyle

    atvlifestyle Well-Known Member

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    Michigan
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    supercharged with lots of midtravel bling.
    German spec: Gooodntight
     
  7. 4WD

    4WD cRaZy oLdmAn

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    Doug
    Gardnerville, Nevada
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    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now
    This too...;)
     
  8. TacoDell

    TacoDell Truck ~n~ Tow

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    Hemet/SoCal
    Vehicle:
    '00 Tacoma SR5 4X
    Donahoe CO's, Deaver leaf paks, Lockright Locker, All Pro body armor ( sliders, front and rear bumpers ), All Pro under belly skids, Warn M8K w/Masterpull synthetic line, Dual Optima battery system, 4 ea LightForce Striker 170 offroad lights, 8 ea wired rock lights, and plenty more I'm sure
    The stock bolt is only around 55 ft/lbs...
    but I have had those come loose over time
    during severe duty when flexing things out off road.
    If the center bolt comes loose... the individual leaves could possibly fan out.

    Sooo... I replaced mine with a grade 8 cap bolt/nut
    and torqued that down to around 75 ft/lbs.

    It's been several years now...
    and nothing has worked loose, malformed or broke

    * I recommend red locktite when installing.
     
  9. 4WD

    4WD cRaZy oLdmAn

    Joined:
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    Gender:
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    First Name:
    Doug
    Gardnerville, Nevada
    Vehicle:
    No Truck
    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now
    Yep , had that happen before I try to use either a rated nylock or I'll tighten down & back it up w/nut (dbl nut)
     
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