Not sure but I think I remember seeing a post about leaking rear main seals on the LMM's? Front of my trailer has oil? or some type of fluid spots all over the front of it. Have to check truck out tomorrow. Any help appreciated. Thanks.

Look at the transfer case, It might be the pump rub issue.

Don't know about the LMM but my LB7 had an couple of incidents of blowing raw fuel out the exhaust. First time, dealer replaced the MAF sensor to fix it. Second time, I cleaned the MAF and that fixed it. The oil on the front of my 5er was green with soot in it.

On edit: Also had a rear main seal leak. Dealer dropped some dye into the crank case and had me drive it for a few days. Hit it with black light to trace back to the source.