Conversation Between xjcamaro89 and asteig

I need your advice on a IWE system on my 2005 F150 on the thread you did in March. I loaned a freind my truck and he accidently put it in 4WL and drove very fast and spun a bearing in my motor. My warranty replaced the motor but did he damage my 4w drive system. When in 4H I turn the the wheel sharply left the engine starts running rough. I shut it off and restart and it is fine. When in 4L the engine stalled 3 times. What would cause these engine problems when in 4WD?

Thank you,

Al