Dan, I bought mine new in 89 and was not happy with the gearing. Guess the thing would run 200 smph. I have a box of brass gears from slot car days and found a pair that would mesh properly. The original gears between the motor shaft and the worm gear shaft were 9T pinion on the motor shaft and a 19T on the worm gear shaft. 2.11 : 1. I can't remember what the tooth count on the gears I replaced the originals with but they raised the ratio to a over 3:1. It made a huge difference in it's ability creep but one problem I had was the original gears are 32 pitch and the slot car gears were 48 pitch (finer teeth) and they tended to whurr a bit louder than I liked so I made a gearbox cover out of brass and played around with different home brewed gear box grease. What I ended up with was STP, Graphite and very fine sawdust. With the gearbox cover in place it is at least as quiet as the original gears. I have an LCRU2 that I am planning to install in it but may have to wait till fall before I can get to it I will make photos and count the teeth on the new gears then. I remember another problem I had was the motor wanted to start running before the E-unit completed pulling the drum into place and when going from neutral to forward It would lurch forward like a drag racer. I cured this by stacking parallel back to back + to - diodes on the leads to the brushes. I don't remember how many are in the chain but I kept adding pairs till the E-unit would completely cycle before the motor had enough voltage to run. With the mods the B6 is the best running conventional loco I have. J
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