Compression Ignition Addict
Join Date: Oct 2010
Location: Beautiful BC
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Those are welds that hold the cast center section to the axle tubes. Big plug welds.
I would look into getting the tubes fully welded to the center section.
Also sounds like you are in bad need of a good set of traction/anti warp bars
1991 Ranger - 38" TSL's, 3 link, One tons, 5.38s on King air shocks....under construction.
1997 Ranger - reg cab flare side, 3.0L, M5OD-R1, 4x4, 31x10.50r15 MT's.
2008 F350 - Crewcab short bed, 6.4L diesel, H&S XRT Pro, AFE DOC/DPF delete
1972 Mustang Coupe - 302, c4, 9", 4.11's locked.