Trent.... 900lb spring rate?? Are they measured different then most? 900lb would drop 1" for every 900lb of weight?!?! So you might get two inches of drop with a 900lb spring in a lite truck. How much compression/drop are you seeing in the spring?
No, remember you have a spring on either side of the truck, doubling the capacity to compress 1" to 1800lbs. that then means our suspension will compress 2" of its wheel travel at 1800lbs on the front. it now takes double that weight to make the spring compress 2". which would then put the factory suspension at 4" of compressed suspension travel at ride height. other factors are involved as well dealing with our suspension so its not that simple but for explination sake, you can see why it can be made to work