RCCrawler Forums

Dudster

Hello.

Norway calling!

I have realized that old nitro Mad Forces are on the cheap and have recently acquired 4 more or less abused nitro Mad Forces.

I have sold off all the nitro bits and have torn the cars down in order to rebuild two of them with a custom long wheelbase chassis.

I have a 1:7 scale Kyosho Scorpion that performs wonderfully on a local beach. I love it's sheer size and I want to extend the two Mad Force's to the same wheelbase, ie stretch it from 316mm to 452mm as part of the rebuild.

The leftover Mad Force parts will be organized in parts bins to form an el cheapo spare parts inventory.

My problem seems to be with regards to shimming the diffs. I have discarded the straight cut gears and only kept the helical cut ones.
The instructions for the old Mad Force specifies that only the rear axle housing should be fitted with a 8x16x1mm washer for the shaft of the outgoing gear, but I find that the gear mesh between the 43th/13T gears are way too tight. What am I doing wrong?