LLC
Ford 9” Housing
Weld on bracket measurements are the same for 12 bolt and 9”
‘70-81
1.5” From
Front of
Casting
Web To
Remove
Drive Side
Web
Mystery 12 Bolt Top With Angle
1.5” From
Front of
Casting
Web To
Remove
Top of
Casting
9” Ford, 12 bolt
Dec 12, 2013
Please study these diagrams before attempting to weld.
Remember, measure twice, weld once. This procedure
is best done by a professional that has the ability to
check and straighten the axle housing should it warp
during the welding process.
** Be cautious to note where factory
pinion bearing oil passage is when grinding!
1.5” From
Front of
Casting
1.5” From
Front of
Casting
Web To
Remove
Pass Side
Web
If Flat Pad
Nothing to
Remove
Web To
Remove
Casting To
Remove
Web To
Remove
1.5” From
Front of
Casting
Mystery 12 Bolt
Angle Top Drive Side
1.5” From
Front of
Casting
Mystery 12 Bolt
Angle Top Pass Side
Casting To
Remove
Web To
Remove
18.687”
Measure to pinion center line Measure to pinion center line
This dimension will
vary according to
overall axle width.
Center Torque Arm bracket holes are
to be centered in line with the back
of the 9” housing face.
Note: 12 bolt tabs are pre-welded to rear
bolt-on torque arm mount.
9” and 12 bolt trailing arm brackets
(17 11/16”)
Pinion Center
38.625” (36 5/8”)
19.937” (18 15/16”)
4.5” (4 1/2”)
Drive Side
Web
Top of
Casting
69 Camaro 12 Bolt Top
Pass Side
Web
Web To
Remove
69 Camaro 12 Bolt
Flat Top Drive Side
69 Camaro 12 Bolt
Flat Top Pass Side
Web To
Remove
18.70”
17.45”
Measure to BracketMeasure to Bracket
2.1”
Weld placement for 9 inch Torque Arm tabs
2.1” Allows .040 Crush and Room for Powder coat
12 bolt tabs are pre-welded to rear torque arm mount which bolts on.
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