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Driveline Mini-buggy transmission, differentials, Forward Neutral Reverse (FNR) and gearing discussions.

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Old 07-03-2008, 04:16 AM   #1 (permalink)

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Join Date: Jan 2008
Location: Missouri
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Default 6 Part Forward Reverse Gearbox

I just dissasembled the gearbox on my kids mini mini buggy. I used a FNR gearbox from a lawnmower on a fully caged gokart frame with 21" atv tires. It is a Spicer gearbox. It amazed me how simple it is. The input shaft is a pinion shaft. 90 degree from it is the output shaft. On each side of the pinion shaft is a ring gear. In between the ring gears is a coupler that is keyed to the shaft. It has notches that engage the ring gears for forward and reverse. I think I recall this is the same setup used on outboard motors. The gearbox is packed in grease. It is about to give up, when it does, I will clean it up and take pictures. Tim
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