This is a common problem with FS9 textures in FSX. You can fix it easily with DXTBmp.
http://www.mnwright.btinternet.co.uk/programs/dxtbmp.htmRun DXTBmp & click File > Open. Find & open the file named jcwheels.bmp in the T-34 texture.A1 folder.
Click Alpha > Invert Alpha.
Click File > Save As > Extended Bitmap.
Select DXT3 format & save it in the original location. Overwrite the existing file when prompted.
Try it in FSX. Select the "Bare Metal" variation.
If that fixed the problem paste a copy of the modified file into the other Texture folders of the T-34.