[JThiessen]

Here is the spring list
5435 Spring, shock (GTR) (2.6 rate Yellow) (1 pair)............................... $6.00
5436 Spring, shock (GTR) (2.9 rate white) (std. front 90mm) (1 pair) ........ $6.00
5437 Spring, shock (GTR) (3.2 rate orange) (1 pair) .............................. $6.00
5438 Spring, shock (GTR) (3.5 rate green) (std. rear 90mm) (1 pair) ........ $6.00
5439 Spring, shock (GTR) (3.8 rate gold) (1 pair) .................................. $6.00
5440 Spring, shock (GTR) (4.1 rate tan) (1 pair)..................................... $6.00
5441 Spring, shock (GTR) (4.4 rate black) (1 pair)................................. $6.00
5442 Spring, shock (GTR) (4.9 rate silver) (std. front 120mm) (1 pair) ...... $6.00
5443 Spring, shock (GTR) (5.4 rate pink) (1 pair)................................... $6.00
5444 Spring, shock (GTR) (5.9 rate blue) (std. rear 120mm) (1 pair) ........ $6.00
5445 Spring, shock (GTR) (6.4 rate purple) (1 pair) ............................... $6.00

I normally run the Orange/gold combo also, and have the same issue with the super soft rear on the revo (thats why i started that suspension re-awakening thread). I recently tried the purples on the rear, and while it helped with the sag, the truck was all over the place. I put new GTR Ti shocks on yesterday. It is still soft, but the action is much improved. I think that I also used to skip on the shock oil which probably had some effect. I hated having it drip out, so I'd just not put as much in - I think the system relies on having it at maximum capacity.

How did you "dial out preload"? Just curious.

I'd start with the middle sized sway bar. You can also play with roll over/balance by changing which hole the uppper hinge pins are in.