6L50 Broken Input Shaft
 

A few weeks ago I broke the input shaft on my V6 while doing a WOT pull during the 2-3 shift. The shift was set to 7500, it shifted, then went straight to 8300 RPM. I didn't have my supercharger on at the time but before then I was leaving from a dead stop in 3rd gear only doing 0-60 runs, the converter would stall all the way to 5100-5200 RPM and put a ton of torque onto the shaft. I exceeded the OEM limits, so now I've taken it apart and seeing about getting a stronger one.

Thought I would share the carnage it caused. The Pump Housing tube where the input shaft goes through is scratched. The 4-5-6 Clutch Assembly has the input shaft broken, and gouges on the outside from metal being circulated around. The 1-2-3-4 Clutch Hub Assembly and 3-4-5 & 2-6 Clutch Hub Assembly where both gouged when metal got between them. The rest of the input shaft is in the torque converter, stuck and I have to send it to Circle D to get rebuilt.

nice carnage!

Didn't see this damage until I looked at it from a different angle, this is the pump assembly where the input shaft goes through. You can see where it broke, and it was a good break. Can't wait to put it back together and see if I can top this level of damage.