Express/Savana Coil Lift Springs

[wantahertzdonut]

I have a 2010 2WD Express that I installed a 5.5" lift/long travel suspension system in 2017. The coils that came with the kit sagged to the bump stops after maybe 15k miles, so I installed a set of Moog 81008 coils (direct replacement for a 6.0 Express 3500). These worked well for a while but they too have sagged to an unacceptable level. Moog offers the 81004 springs which are for the heavier diesel Express that have a resting length about a half inch longer and the same spring rate. I'm considering installing these to get a little extra ride height due to less weight on the front. However, I've been reading Moog springs all sag, and I don't want to replace my springs every 2 years.

I'm inclined to find a stock GM replacement spring in hopes they won't sag. I'm having a hard time nailing down the part number for springs used on the 6.6 diesel, but think GM P/N 20760347 is it. Can anyone confirm? They're a shorter resting length but a higher spring rate.

Are there other options out there that people have used to lift an Express with success?

 

[Kevint888]

Can’t help you with the springs as I also have moogs that sagged. I am curious about the lift/long travel you have installed if you have information and photos.
Thanks

 

[wantahertzdonut]

Can’t help you with the springs as I also have moogs that sagged. I am curious about the lift/long travel you have installed if you have information and photos.
Thanks

I don't have photos on my phone, but the kit is a one off long travel setup Weldtec made for me. It's an upper control arm and spindle that provide just over 10" travel. They didn't have any plans to support the kit after going with a different design that uses coilovers.