Mirrors inside cab

Hi all im wondering if anyone could help me.

When im viewing the mirrors in cockpit they stutter i do however have the reflections and setting is on full thanks

First off, it's not a stuttering effect, but an economical effect in that the mirrors refresh ⅓ of your current framerate. Anyway, you have to go into Options -> Graphics (advanced) tab. On the left side, you'll see 2 settings under Forced Refl. Economy Mode. You can change the "activate below FPS" setting to 5.000 and the "deactivate above FPS" setting to 10.000. If you don't like those numbers, you can change the numbers to your preference, as long as the "activate below FPS" number is set BELOW the "deactivate above FPS" number.