I HAVE A HPI RS4 3 SS AND I WAS WONDERING HOW CAN I MAKE MY 2 SPEED KICK IN SOONER.. AND I HAVE A TUNED EXHAUST ON IT BUT HOW CAN I MAKE MY CAR FASTER WITHOUT BUYING MANY PARTS....

There are 2 set screw from your 2 speed transmission, turn the adjusting set screw from your 2 speed transmission counterclockwise so the transmission will kick in soon, be carefull not to turn the locking set screw of the drive cup. For you to run faster, use 20 to 30 % nitro, replace your pinion and spur gears, and whoolaaaa ! Your car will be flying !!! WHOOOHOOOO ! ! ! :spinnyeye

:stupid: whew...i thought a 2 speed and a tuned pipe was fast enough...

Hi Allan Aguilar, may I know that will you know about Yokomo Gt4 2 speed tranny?? If yes, please help me on below question. Thanks in advance,

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.

I too had the same problem building my RS4 SS's 2 speed transmission, it did'nt shifted at all during the first few tries of testing the tranny. My mistake was that I installed the finger clutch cam in the right direction.

Before I corrected my mistake, I removed all the set screws and make sure that there is no binding in the finger cam, then I rebuit the tranny according to the instruction manual. Also check your tension spring, if the spring is already compressed replace it. Rebuilt your tranny according to the instructions. Don't forget to use locktite in the set screws.

Tighten (but not too tight) the 2 speed adjusting set screw and run the car for about 1 to 2 minutes, then unscrew the set scew 2 turns counter clockwise and check the response of the car if it shifts, continue unscrewing 2 turns, do not over unscrew, you might loose your set screw, spring and the small metal ball.

I hope, this will be a good reference point for you to follow, otherwise, you can drop an e-mail to Yokomo USA about your concern.

My 2 speed tranny is a brand new..........yesterday I try to do the engine alignment which the pinion and the gear. Will try it soon and will let you know the results.
Actually anticlockwise are make it shift faster and clockwise make later..........correct me if I am wrong. Thanks.

khoo

I just broke in my car but the transmission isn't shifting.I screwed it all the way down and back out 2 turns (720) to start over and it still didn't shift so I started backin it out about 1/4 turn at a time a few times and still no shifting.that screw is hard to adjust and its pretty frustrating and I wondered where everyone else has thiers set at and if they had the same problem at first.thanks

check your clutch holder (A881) if you installed it in the proper direction. Check also the cam from the clutch holder for any binding. When I built my 2 speed transmission, I also encountered the same problem, it is really frustrating at first, but once you fixed your mistakes, you will be surprised how sweet the sound when the car shifts to 2nd gear. :surprised

Hope this will help.

cool,thank you .....I'll get to messin with it