[chirodale]

Hi Tom, John Crawford here commenting on your failure. We import Shamrocks with jag rearends. What I see here is that the shortening of the lower swing arms were shortened in the wrong place and then where they were shortened was never reinforced. If you can see the Shamrock Jag rearend, you'll notice that where its shortened on both the axel as well as the lower swing arm are sleaved and welded on both ends of the sleave. We've talked with our manufacturer on this issue and they have tested the rearends to 700hp with out failure using street tires. Obviously with this kind of hp and racing slicks, you're bound to break something. The original Jag that these rearends come out of weigh around 4600 lbs. Our Shamrocks complete weigh 2600 lbs. Then with shortening them only adding strength from the original. So my thoughts are on your failure came from whoever shortened your components and the only other opinion as to the failure would be if the shocks and springs were extremely to rigid for this application and not allowed to flex with the weight of your car. This is a very unfortunate failure but definitely not the norm. Nice car though. Good luck
John Crawford
Shamrockautocraft.com