On my overdrive ST my 2 speed isn't working. Should I loosen or tighten or what?

depends on if it's always in 1 st gear or 2nd gear,does it senn to wind out very quick and not go very fast or just the opposite?

If you just got it and its right out of the box then it should be like 7-8 tanks before you notice it. I have the overdrive too and thats how long it took I think, just dont change the settings on the clutch and it should eventually kick in.

I think it's in first gear.

try unscrewing the ADJUSTING SCREW NOT THE SET SCREW 1/8 turn at a time, that would be counter clockwise,
hope it works for you

Hi all the RC forumer........I need some advice from you that why and how my GT4 2 speed tranny can't shifting when I go for long straight track?? I already try to adjust or loosen the set screw.....try to do it for few time but result also same.....can't shift. Please give some advice..........The 2 speed tranny type are like cam-style and not same as NTC3 or Serpent Impulse. Thanks in advance.