Base model is Alan Braid: Allison 3200 Transmission
I adjusted and made renders.
"Other" file format - .OBJ with Bb Style

Technical characteristics:

3000 SP Transmission - Specialty / Military;
Input Torque Gross - 1695 (1250) N•m (lb-ft);
Input Power Gross - 336 (450) Kw (hp);
Turbine Torque Net - 2305 (1700) N•m (lb-ft);

I added .png format renders (without background) for presentation and etc.
I added mono-chromatic renders with minimal shading.

For CyDesign challenge.