swathdiver
Full Access Member
My Yukon XL has the curved ones. The Escalade ESV that came with the 9.5" axle had the straight ones if memory serves. The other Escalade rear, not sure which wheelbase, had the curved ones. Might have gotten them mixed up. Anyhow, I have both sets of used ones on my bench from their axles.Weird, my 2012 has the curved.
I see the straight ones labelled as 'original grade' Perhaps they were originally straight? Straight ones look like welded steel, curved look like.. forged iron?
More tire clearance at extreme angles?