I presently am running a 4" teraflex lift and 37's.
I love the way it looks, but I have been having trouble with my legs and was diagnosed with muscular dystrophy.
I need to lower the entry height a couple of inches so it will be easier to get into.
The 4" springs w/ the factory spring pads actually lifted it well over 5".

The Teraflex 3" springs should actually lift it about 4".
Everyone says that I need 4" to run 37's.(I have 13.5"nitto mud grapplers on AEV Pintler Beadlocks)
Will it work, or am I going to have to drop to 35's?

 

Yes you can. My coworker is running 37" on his unlimited with a 3" LA kit. You will need to add front lower and rear upper bumpstops to your JK to do it.

 

I have the complete system with front and rear upper and lower control arms.
Will the extended bump stops that came with the 4" lift work?

 

Yes the bumpstops from the 4" kit is what you need.