Does anyone else notice that the frame has alot of flex in it specially when really getting twisted up? Im talking about maybe 2" at the end of the bumper. Good thing so far is that it straightens itself out.

 

Pics? And maybe a little more explanation.

 

Welcome to the world of heat treating. It's supposed to do that, if it didn't it would snap

 

you mean like in the FJ
http://www.fjcruiserforums.com/forum...body-rips.html

 

Yeah, I saw that thread last week. It has 113 pages to it in less than a month.
TRD.....I think they forgot the "U".......

 

YIKES! Glad I didn't get an FJ. I'll take the "Stall Bug" issue any day over a cracked frame or body!

 

X2

 

I think its going to be the same type of thing with us over long term use. I understand why mopar suggests the JK frame is stiffer than that of the TJ, but if youll stick your fingers inside the frames, side by side, the TJ is SIGNIFICANTLY thicker than the JK ( I am a JK owner, so Im not bashing, love my Jeep). They claim stiffer because of more crossmembers, and a wider framerail crossection, just failed to mention its half the gauge thickness!!!!

 

They claim stiffer because it's stiffer. The frame is a system. All the components that you mention do make the frame stiffer. The thicker guage does not make a stiffer frame by default. That's the beauty of engineering. The thicker guage DOES make a difference when you introduce external forces in unexpected places. (like balancing your jeep on it's frame rail over a boulder).

 

That was nasty.

I've always thought that as well.