I have a 2 door 2007 JK with a Clayton 4.5" long arm lift. I am running ProRock Dana 60s and 37" tires. With aftermarket bumpers, winch, and tire carrier with jerry cans and rack, the rear tire hits and dislodges the stock rear fender at full stuff. I am adding a Hemi and I'm concerned about the extra weight.

I do not want to swap out the fenders, do not like body lifts, and do not like coil spacer lifts or the JKS ACOS because they all have their cons (some are minor, but still cons).

I would like to correct the sagging the right way, by installing stiffer/longer springs. Should I be able to install Teraflex's 6" springs in place of Clayton's 4.5" (Clayton doesn't go higher than 4.5")? My hypothesis is that since the 6" springs will bring the sag back up to the original height as the 4.5", I will not have any issues with pinion angles, shock length, etc.

What are your thoughts?

 

Seems like it could work logistically. You could also consider AEV springs from their 4.5" system. The AEV coils are progressive and provide more resistance as they compress.

 

Great idea... I'll have to call Clayton and see if their coils are progressive or not.