Hello,
today the last parts for the new gearbox finally arrived.
Drawn the design for the gearbox housing with Fusion360 and the 3D-printer did a good job of printing:

- Fusion360.jpg (115.08 KiB) Viewed 1943 times
With the high total weight of the model, there was not much choice as far as the gearboxes were concerned.
Modellcraft gearboxes were used, but with the shorter gear ratio in 1:18.
The Panther has additional a 3:1 countershaft, this gives a ratio of 54:1.
Together with Hobbywing Quicrun Fusion SE 1200kV sensored brushless motors with integrated controller this is a good siolution.
The 21T motors are only placeholders:

- 19052023-01.jpg (84.4 KiB) Viewed 1943 times
The installation is a bit tricky, because first the two bearing housings are screwed to the hull sides on the left and right.
Then the gearbox with the two half-shells is pulled against it.
Here it is installed:

- 19052023-02.jpg (70.86 KiB) Viewed 1943 times

- 19052023-03.jpg (85.81 KiB) Viewed 1943 times
Then a test drive was made to the backyard.......
The result is a big smile - it drives great.
All things come to a good end.