Originally Posted by jamdude
so, just to understand , if i buy the kyosho part kyow12z for it drops right in ,but the hpi 78mm for will fit but i have to do stuff to my diff, Sorry i just got into r/c about 6 months and mainly have traxxas stuff ,this is my 1st non traxxas car, I am just looking for the easiest fix so i finnaly drive this car . I tried driving it with just the rear wheels and its pointless. Cant i just install the hpi 78mm dogbone ?
The 'least painful fix' if your drive cups are as they 'arrived-in-the-box', is to cut a 'popsicle stick' or piece of your cereal box or soda cracker box to 78mm and slide it into the slots of the 'drive cups' between the front diff and your trans drive cup with needle nose pliers. My 'cheat sheet' that I 'magic-markered' under my tool box lid says the shaft length on the front of my GT1 was a 84mm before needing to 'shorten it' 5mm or so per the difference of the 008 trans shaft. Yes, the shaft that comes with the new trans is the new 'shorter' shaft for the front shaft of the GT2, not for the front of a GT1. (that shaft mysteriously fits the rear now of the GT1)
The more 'involved fix' is using the 12z CVD where you'll need to deal with the pinion/spur lash by taking the diff off of the chassis and getting the pinion 'pulled out' before tightening the set-screw on the cup on the pinion. You don't have to believe me but your next post will be on how to deal with 'diff eating gears'. I've seen this question so many times it's not funny.
double check....double check.....TRIPLE check with the popsicle stick or cardboard. I've got some damn CVD that is too long and I am not about to grind to make it fit........I'm pretty sure that the HPI 78mm dogbone is your easiest fix since it sounds like you are not a PHD or 'Blackbelt' in DREMMELING.
Yes you can enjoy a Kyosho GT but due to some failures by an otherwise great company our cars are lacking some support.