Not sure, all I can suggest is looking on E bay and follow a search to see if any come available... in truth I don't find a 3 speed to be of much use anyway, it is a pain to adjust 3rd gear without removing the gearset from the transmission, I am plenty happy with the speed of my rig......
While that's true and I disliked it for the same reason, it was pretty cool hearing it shift twice.
🙂
I don't recall if the gear ratio's ended up different or not from 1st to 3rd over the 2 speed though. If I remember right, 1st was a bit lower and 3rd was a bit higher with second allowing for the extra gap between without straining things so much. Or, at the very least, 3rd was the same while 1st was a bit lower which would let you run a larger bell/smaller spur to end up with a higher top end while still having plenty of torque down low to get it going.
I had one when I ran nitro in the winter and I'd use a junk engine for winter bashing, which required that I had to run different gearing and adjust the 3 speed quite a bit. Which is no fun when it's 25F outside. So, I gave mine to a friend and went back to the 2 speed, which was easier to adjust.
Found a lengthy thread on another forum where the guy was fighting with people over HPI saying the 3-speed added 10% more top speed, which it doesn't.
Overall Gear Ratios
===================
2-Speed
1st Gear: 18/44*32/29 = .45141 = 2.22:1
2nd Gear: 23/39*32/29 = .65075 = 1.54:1
3-Speed
1st Gear: 18/44*31/30 = .42272 = 2.37:1 (6.7% increase)
2nd Gear: 21/41*31/30 = .52927 = 1.89:1
3rd Gear: 24/38*31/30 = .65263 = 1.53:1 (0.7% increase)
What it does do is allows you to run a higher gear CB without putting so much strain on the clutch as it shifts to get to top speed by adding an incremental extra step between 1st and 3rd gear, which spreads out your usable powerband a bit more. So, odds are, you can gear 10% taller with your spur/cb without frying your clutch or overheating the engine.
