[Arefin Bari]

High Gear max output RPM – 742.50
Low Gear max output RPM – 185.63

108’s 2003 transmission had all the reduction done inside and output was the wheel. We had a lot of problem with that transmission. It broke quite a few times, bent a lot of shafts. Let’s put it this way… we took apart and put together that transmission 16 times at Florida regional. Personally I don’t like to do inside reductions, because it gives me an option to put the transmission wherever I want on the chassis.

I am not worried about the weight. It’s 5 pounds, and I think I can kill 10 pounds on transmission out of 120 pounds. Yes, every ounce helps. Maybe I will shave the gears more, maybe will do some CNC on the plate. But that is after I know the transmission works perfectly.

I didn’t understand your question about the dog. If you were asking why it is not inline all the way, its because I left it out in the drawing so everyone could see what the dog looks like. In reality the dog will be engaged with the gear at all time while running.

No I am not using any bearings. I am doing it just like any other dog shifter where you have a pin that is moving the dog back and forth with the pneumatics.

Tooth counts:

Cim Motor – 12 tooth… meshes with 60 tooth gear… on the same shaft there is a 30 tooth…. Next shaft over (shifting) another 30 and a 60 tooth. output of the transmission there is a 10 tooth sprocket. Easy and simple.