Hi
When we raced them we made a few changes to stiffen things up a bit. We had a brace across the front to support the tops of the towers. the rear end was the one point that gave the most problems. the chassis when loader had a habit of breaking at the base of the roll bar mounting tube or where the top arm bolted to the very rear of the chassis where bolted to the body. The other problem was the big rubber bush the located the lower arm to the diff. We replaced these and made the rear end more placed and didn't move around as much, the bushes had so much movement in them it was almost impossable to control the rear end. If a bar is placed in the bottom of the boot and linked the body and the chassis, with the 2 top suspension arms together alot of the rear flex is also removed. All this flex contributed to the axle trmping that was common.