Composite hull with 105 mm turret.

Negative.  I looked around at that link and discovered that the South Africans fitted a Mercedes-Benz Atlantis 442 diesel engine with 4-speed Allison transmission, coupled by a drive shaft to the original trans at the front which acts as a transfer case.  Now it has 24 gears forward and 6 back, and much improved fuel economy.  The radiator sits atop the engine, and is seen hinged up for access in one of the images.  Another radiator or oil cooler has been fitted to the rear plate.  There are many images in other updates regarding this tank on the Sandstone Estates website.  The conversion actually looks pretty straightforward.  Without crew, you might want a partial interior up front, since the holes for the rotating periscope bases are open.

Atlantis Diesel Equipment in South Africa manufactures Mercedes-Benz diesel engines under license; Mercedes-Benz has built cars and commercial vehicles in South Africa for decades.  The OM-442 is part of a family of diesel engines in V6, V8, V10, and V12 configurations.  The OM-442 can be naturally aspirated or twin-turbo; the Sherman Mk. IV 105mm is fitted with the twin turbo.  The engine displaces over 14 liters, so it's big, and produces 400 HP and 1181 lb-ft of torque.  Plenty of power, especially with the gearing.


Wow. That is a lot of gears to be grabbing on that tranny.