Checked my trans for the marking. No dice. Still going to stick by the oil starvation for now unless your rebuild wasn't performed properly. Bouncing the motor off the Rev limiter while spinning in a circle would surely airate your oil and leave your crank unprotected. Another thing to check is the condition of your oil pan. For us 3s guys people tend to jack up the car by the oil pan denting it and compressing it against the pickup. This causes oil starvation and spun bearings. Make sure yours looks good.