Hal,
My jag also had a strong recoil on it ( not as strong as your though). I had to do the suspension spring mod as the drive wheels were almost in-line with the roadwheels. Not only did it lift my cats chin up, but also calmed the recoil down. Your jag looks good, did it come with the camo? I ordered the metal upgrade with mine and think it would have climbed that grade your was slipping on ( or flattened it, with the metal gears, drivers, idelers and tracks, it weighs a ton) Have fun.

Jim