AlwaysExplr87
Member
My brothers XJ has always had a little knock when under load or shifting into 4th. I never thought too much of it, mostly because mine did the same thing its whole life. Well I was driving it the other day and it got a little worse. We noticed that if you turn the heat on it disappears. The heat has to be all the way hot or it still knocks. My 4.0 knowledge has slipped over the past few years of driving a yota and any help would be appreciated. Anybody got any ideas as to what the issue could be? I'm thinking a vaccum or ignition issue, but thats just a shot in the dark.