DCWinterXJ

Okay well here is your update. I suppose I must yield to Turbo X J since he wins with exhaust banging cross-member. So they were doing what they could to fix that and asked if they could pull the cat and do a straight pipe..so I was like hells yeah! I was planning on deleting the cat anyway. So they welded a straight pipe into my glasspack muffler aka cherry bomb...and welded mount hooks all proper and what not. So no more banging metal but I am being honest when I say I can still feel the warp in the flywheel. It is not hitting anything now or causing the problems I thought but I know it is there. But after setting up the exhaust...holy crap! She takes off like a dam dragster! I was not expecting that big of a change. So she is good for now, I guess I got overhyped about the flywheel. But I know it is warped slightly and I think that is what shakes the truck. My mechanic did not even address it, probably cause he does not want to fix it. But whatever if she runs without shredding metal I am ok with that. I am happy with the end result. Of course with this xj she usually goes about 2 weeks before she wants me to spend more money I don't have. I guess we shall see. Thank you everyone for your advice!

Turbo X_J

DCWinterXJ

Well I have been driving her almost a week now and yes there is no heavy metal knocking anymore but I know for certain the bent/warped flywheel is making the jeep shake and still do the chug chug. It is not causing any issues as far as starting and driving are concerned but it is significant to a motorhead like me. Am I truly mistaken? Should my engine kinda shake the whole truck like that...especially with the straight pipe? I dunno. I can drive it like this no problem but I just don't want bigger problems down the road. Hmm I will have to figure out how to get a video on here so you all can see what I mean. Until then. She is solid and mean and just what I like.

awg

I am not sure, if its as easy as just unbolt the torque convertor cover, but if you have an assistant, place a dial gauge
(or even a fixed point with feeler gauges) against the flexplate, and have the assistant rotate the engine using a 19mm socket on the damper bolt

then you will know for sure what runout exists...there may even be a spec for it somewhere?

afaic, a flexplate should have very little runout, maybe .010" ? ...too much would be sure to end in tears

DCWinterXJ

Well check this out...it was much warmer today here...like 50 to 60 degrees, and the chug chug engine shake seemed to disappear///what the heck does that mean? I could not feel my warped flexplate and the idle was smooth as butter. Can thick oil put a strain on the motor to the point that it chugs in cold weather? Currently I have 5 quarts of Rotella t6 5w40 and 1 quart of lucas oil stop leak. Now the lucas is reallllllly thick stuff. Like molasses. Could that strain the motor into hip hop mode when cold? My startup pressure is around 40-45 psi and my running pressure is aroound 20 psi but may go a little lower. I dunno what to think anymore. Well there is one thing. I have lost my mind. Also thanks for the advice. I am also running a Mopar filter.