OK... I had to do a bit of research on this one, just so I had my facts straight.

The Jeep springs used to lift the rear of the Sportage are 104AA, 105AA and 106AA. The OEM springs all have tags on them with these numbers. They were used on Wrangler TJ models, though they may have also been used on the Cherokee models too. Each tag number is thought to reflect a different spring rate, with 104AA being the lower/softer spring, 105AA in the middle and 106AA being the stiffest. However, it could really be a reference to the load rating. I think the springs all have the same height. But they compress differently under load, thus giving the Sportage varying degrees of lift (approximately 3", 3.5" and 4" lift, respectively). Again, that could be due to varying spring rate or load rating. But that's splitting hairs...

Regarding the purchasing of springs - new springs, specifically - you will probably only find the 106AA springs through a Jeep dealer. The after market options are coil springs with the part numbers 3229 or 3227 (Moog and a few other manufacturers use these numbers). The 3229 springs are standard for the Jeep Wrangler, and appear to fit all models within the line, regardless of submodel (i.e. Sport, Sahara, etc). The specs, per the Moog catalog are as follows:

Spring rate: 200
Uncompressed length: 11.28 inches
Bar diameter (diameter of the spring steel): 0.625 inches
Load rating: 653 (LBS, I think)

The 3227 springs are standard on the Rubicon line. I had to back-track to a message I had received from Everet that pointed me towards some aftermarket springs for the 2000 Jeep Rubicon. This was the fix for my Sporty's "loose rear" after adding dual batteries, a big steel bumper with swing-out spare tire mount, cargo rack and 2 gas cans (5 gallons each) on the back end. They are the springs I'm running now. They tightened up the ride, but aren't too stiff. To be honest, they are perfect for my gypsy wagon. <img src="/forums/images/graemlins/notooth.gif" alt="" /> I'm very happy with them. I would "guess-timate" these as being the 106AA equivalents. Here are the specs from the Moog catalog:

Spring rate: 200
Uncompressed length: 12.113 inches
Bar diameter (diameter of the spring steel): 0.625 inches
Load rating: 821

Summary: Look for aftermarket coil springs with the part number 3229 (standard TJ line) or 3227 (newer model Rubicon). They both will do the job. But I suspect the 3227 will give you a bit more lift and stiffness, or perhaps better handling with a heavier load, which was the case with my Sporty... <img src="/forums/images/graemlins/shiner.gif" alt="" />

<img src="/forums/images/graemlins/patriot.gif" alt="" />

1997 Sportage 4x4, auto-trans, Warn manual hubs, 4" UPYOURKIA front lift, TJ 106AA rear springs, 2-5/8" body lift, 31x10.50 treads, SmittyBilt SRC front and XRC rear bumper, swing-out tire mount, OBX LSD front diff, Track Finder rear locker, 5.38 R&Ps and... really crappy gas mileage! <img src="/forums/images/graemlins/shiner.gif" alt="" />