Kraton Awful grinding/high pitch sound

[SaltyLocal]

Hi all,

I recently cracked the mount that holds the upper front arms. I’ve since replaced the mount with an aluminum HR model, but once I got her all back together and took it for a spin, I noticed this high pitch, grinding sound which gets louder with more throttle. I then thought it was the motor and pinion gears so I ordered and swapped for Arrma factory replacements.

Unfortunately, the sound is still extremely audible every time I take it for a spin. Without a video (currently away from home), can anyone recommend an issue I should check? Thanks in advance!

 

[Jordan10R]

Hi all,

I recently cracked the mount that holds the upper front arms. I’ve since replaced the mount with an aluminum HR model, but once I got her all back together and took it for a spin, I noticed this high pitch, grinding sound which gets louder with more throttle. I then thought it was the motor and pinion gears so I ordered and swapped for Arrma factory replacements.

Unfortunately, the sound is still extremely audible every time I take it for a spin. Without a video (currently away from home), can anyone recommend an issue I should check? Thanks in advance!

Idk hard say flip it over or take wheels off ground and try hear where it's coming from.

 

[slick2500]

I'm guessing you ran head on into something? You might have stripped the front diff.

 

[SaltyLocal]

I'm guessing you ran head on into something? You might have stripped the front diff.

I can’t say that I did. When I ordered the motor gear, they sent me the entire center diff with the gear. I drained it and put 500k back into it, as I changed diff fluids after newly purchasing to 60k, 500k, 20k. It ran sold prior to the front arm mount cracking.

 

[adamcash]

Hi all,

I recently cracked the mount that holds the upper front arms. I’ve since replaced the mount with an aluminum HR model, but once I got her all back together and took it for a spin, I noticed this high pitch, grinding sound which gets louder with more throttle. I then thought it was the motor and pinion gears so I ordered and swapped for Arrma factory replacements.

Unfortunately, the sound is still extremely audible every time I take it for a spin. Without a video (currently away from home), can anyone recommend an issue I should check? Thanks in advance!

Did you find out what it was ?