Is there a difference between 2wd and 4wd leaf springs for 06-08 rams? My coworker has an 08 5.7 4x4 1500. I have an 08 4.7 4x2 1500. I took some measurements the other day, and his 4x4 sits exactly 1" higher in the front, and 1" higher in the rear. We both have 20" wheels, with 275/60R20.

I was always under the impression that the leafs were the same. Then today, I was looking over the 2008 1500 parts manual and I found 4 different part numbers for leafs.

52110136AH 1 1 61 [ZCS,ZRS] - (2wd reg cab)
52110137AG 1 6 61 [ZDS,ZSS] - (4wd reg cab)
52113120AI 1 1 62, 41, 42 [ZAS,ZNS] - (2wd quad cab)
52113141AI 1 6 41, 42, 62 [ZBS,ZPS] - (4wd quad cab)

Are the 4wd leaf springs 1" taller? Why do they have different part numbers?