Does it roll smoothly to a stop without the pinion meshed to the spur? I'd check that out.

You should be fine to just swap over the spur gear, jusr need to get one the same size & with the same mounting pattern- maybe brand specific, not certain on that.

ok cool i'll try and check out the spur gear. it uses like 6 screws to screw into the diff.

and when the pinion isnt attached its smooth as butter, will coast for ages

well, the 17T pinion FINALLY arrived, after weeks of waiting. As BrianG mentioned on the first page, i expected the pinion to be the same shape teeth as a clutch bell as it says in the description that it is meant for 1/8 brushless conversions. However, its EXACTLY the same as the 14T i already have! i put it in and the grinding noise is still as bad. For some reason, its seems a little quieter going in reverse than it does forward...

here are some pics:

http://i80.photobucket.com/albums/j1...0/DSC01955.jpg

http://i80.photobucket.com/albums/j1...0/DSC01956.jpg

Does anyone know where i can actually find some pinions that have the teeth shaped like a clutch-bells'?

thanks alot

i would try and find a spur that would fit these pinions...

Saddly yeah, plastic spurs are much cheaper than metal pinions to replace, and the noise levels will drop right down at the same time...

its not so much the noise level im concerned about, its the amount of friction. With my e-revo, the gears were mod0.8, and it would freewheel for quite some time. My hyper hardly freewheels at all, theres a lot of friction.

I had a look at the gears on the HPI Vorza, and the pinion's look like what i should be using http://www.hpiracing.com/products/en/100915/

they say 1M, is that the same as mod1?

cheers

Yeah 1M = M1. Don't know why it's shown that way, probably a typo.

Do your e-revo and hyper use the same motor? That may be why one freewheels more than the other. Try swapping them if they are different.

Just to be clear- the hyper will freewheel just fine with no pinion on the motor- and there is no resistance in the motor except for the magnetic cogging, right? Try setting a loose gear mesh and give it a shove across the floor. It should go about 10-15 feet with a firm push.

Could be down to lack of intertia possibly? Buggy is lighter so slows down more quickly than the truck that carrys more weight, thus inertia/ forward momentum...

I personally think all this grinding noise is simply the gears clacking together. That, paired with a notchy motor, can make a decent amount of noise. If the gears are meshed correctly, manually roll together without catching, and the mount is not bent, you probably just have a loud vehicle. Some of my vehicles are louder than others, that's just the way it is.

well the Vorza pinion came, and its the same one as the savage flux. The teeth look more like that of a clutch bell, and it is noticibly quieter and smoother than the other pinions. Looks like its problem solved!

I always like a happy ending :smile: