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Old 07-23-2008, 11:58 PM   #18 (permalink)
Mwhy
Forum Regular
 
Join Date: Sep 2007
Member Number: 13738
Location: Shawnee KS USA
Posts: 111
Re: damage tolerance?

Quote:
BellyDoc previously said: View Post
I disagree with the part about them being for shear bracing (parallelogram support).

The crossmember they attach to is for the transmission support bracket, and it gets a torque that wants to drop it on one side and lift it on the other. The diagnoal braces are there to help resist twist.

This is NOT a strong crossmember in regard to it's ability to support the frame... notice how easily it crushes on rocks. It's NOT like the longitudinal frame members to the sides. The metal is thinner and it's fenestrated with multiple cutouts. It's held with 2 thin bolts at either end and stabilized with the crimp-ended tube diagonals.

Several crossmembers stabilize the frame into the rectangular configuration, most notable is the double-wide crossbar at the front suspension, the one over the rear axle with the panhard mount, and the one that forms the rear bumper.
I'm curious on your opinion doc.....do you feel they are necessary with something like the MAF skids?
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