Here are some pictures i took of our C4 that twisted the input shaft and cracked open the forward drum , then strippe dout the inside splines. This is the second time this happened this year. We are running a fox body Mustang with 100 shot nitrous 302, 300 stall with trans lock running 7.50's and 1.60 60 foot. I learned alot from this forum about hardened shafts and weilded up forward drums so I purchased them and included them with the old parts in these pictures.



Here is a closeup of the cracked drum and the new welded drum. They weld up the peanut shape holes to streathen the drum hub.