23 or 18 spline?

Did the gear actually blow up? or
did your engine rip off all the clutch teeth?
If the gear is physically intact, it ain't/may not be, a throw-away.

I took out the backseat of my car, so I can only scare the crap out of one fat friend atta time. In my car, I can feel that 250/300 pounder in Second gear. and three of them really slows my car down in Third gear, seeing as she is up to around 4400 pounds, or more. Which has increased my cubes to weight ration from ~9.5 to 12.2 or more; which is like 29%, ouch.
Yeah, the back seat had to go.
She seems to handle not much different tho, at speeds below 50mph.