Welcome, Revden.
Sure, you said all the gears are still there and in the right positions, but are you sure the one on his driven axle is not split? You might need a magnifying glass and torch (flashlight) or something to check for cracks. I'd assume it works the exact same way as the engines. Sun has a repair guide for this version of Terence that should be of help to you. If not, please provide your own photos and/or a video if possible.
Sure, you said all the gears are still there and in the right positions, but are you sure the one on his driven axle is not split? You might need a magnifying glass and torch (flashlight) or something to check for cracks. I'd assume it works the exact same way as the engines. Sun has a repair guide for this version of Terence that should be of help to you. If not, please provide your own photos and/or a video if possible.
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