Having an issue with the 737. The LNAV drifts much like the Gyro of the IRS is drifting. Its like i have a 100kts crosswind, slowly, the angle increases so the computer can compensate and intercept the fix...1) The magdec.bgl replacement didnt work2) Flight1 Registry didnt work3) This error happens everywhere.4) Maybe the AIRAC? ive got 09075) Have the origional SIDs and STARs database.... havent replaced with the latest from Navdata6) The realism settings are set to High, with Gyro Drift DISABLED7) Under the aircraft.cfg line [directional_gyro], its set to the default 3,08) No addon scenery or alot, there isn no differenceI hope someone can help. I searched the entire PMDG forum like a good little boy and came up with many possible fixes, but none that worked for me.Thanks Guys!

Maybe a screen shot would help explain the problem... if you mean the crab angle is changing that one thing but if your lateral error is increasing that is different.

Im going on a cruise tomorrow... ill post a picture when i return. Its not a crosswind or anything, its a progressive drift to the right side... it appears its going gradually to the north.... I dont think its a Magnetic or True north issue with the PMDG.... i have it in MAG.Again, ill get a picture to you in a few days.