ya true! i get every oil change i get everything checked and maintained. just got a oil change and just replaced my tranny oil pan gasket. tranny filter and fluid.. and already check my radiator fluid still good. redid that when i had my freeze plug replaced. oil thing im trying to figure out now is when i first got my truck if i went around a corner and hit it both tires would spin and i could fishtail.. now ill do it and only one tire will spin. but when i power brake it both tires light up.. im confused!!

 

The clutches in your LSD are probably wearing out.

 

So what exactly does spark knock sOund like? I can't say ive ever heard it. Or is it something you just know when you hear it?

 

Drop some marbles in a tin can, and shake it. Spark knock sounds exactly like that.