I suppose it should seem obvious to me that it would eventually happen, but I thought I would have to be running a lot faster than 12.60's. I have never weighed the car, but I would guess it would probably weigh all of 3800 lbs. No transbrake, 3500 stall, 29.5 X 10.5 slicks, and I know I have less than 70 passes total on the car. It does have a spool in the 8 3/4 but I've never run it on the street; it been on the track only since I put it together. The left axle, (the one that didn't break) was twisted in the splines as well. Assuming the car led a pedestrian lifestyle before I got it, (that's what I'm told) I am just surprised that they had such a short lifespan. I have lots of friend that have been running stock axles (in faster cars) for years with no problems. Fwiw they twisted just out side of the spool.