I don’t know what is between me and stripped differentials.

[rockcrawlernick]

I have a Traxxas xmaxx that always strips the pinion or a differential
I’m curious if other people have this problem
And if so what do they do to fix it

 

[Tunedfrog]

Is it actually stripping the pinion or is the pinion slipping on the shaft?
The Xmaxx is pretty much known for the pinion to slip on the shaft and seems
like we just can't get the set screw tight enough.
I cured that problem by putting a heat shrink tube before and after the pinion so it will still
run fine until I get home if that makes sense. The shrink tube keeps it from slipping so much
that it loses contact with the spur. with shrink tube it will still makes good contact.
If it's a slipper clutch problem then follow this............

 

[rockcrawlernick]

the pinion does break but when I check it is always lose on the shaft so it could have gotten loose and not been making good contact therefore ripping of a tooth.
Thanks for the advice.

 

[Tunedfrog]

I would try the shrink tube trick then, I've tried Loctite with no luck.
At least the heat shrink gets me through the day.
If you are blowing out diffs then follow the video. The slipper is designed to protect
everything else in the drive chain. If it isn't adjusted properly then it will affect the diffs.
Any adjustment video will work, I just grabbed the first one I seen.

 

[Greywolf74]

the pinion does break but when I check it is always lose on the shaft so it could have gotten loose and not been making good contact therefore ripping of a tooth.
Thanks for the advice.

I don't believe a pinion being loose on the motor shaft would cause it to break a tooth. If it's already slipping on the shaft, then there wouldn't be enough resistance for the spur to break a tooth on the pinion. You sure it wasn't a rock that got in between and broke the tooth off the pinion and made it start slipping on the shaft at the same time? That seem more plausible to me.

Also, internal drive line resistance like dirty or seized bearings can wreak havoc on diffs, spurs, and possibly pinions too if you're using a metal spur. I don't have an xmaxx, so I can only speak in generalities about this issue.

 

[rockcrawlernick]

It was made in 2016 and I bought it used in 2022 so the bearings could be bad
I have only checked them when I first got the truck

 

[Beer_Goggles_RC]

Just your luck lol

I've tried Loctite with no luck.

Incredible. I have to heat up my pinions to get them off using the loctite. Does the xmaxx motor just produce that much heat?

 

[Tunedfrog]

Yeah I have to heat it also but for some very strange reason, it doesn't stay tight on the shaft.
It slides up and down the shaft until it doesn't make contact with the spur gear.
@Greywolf74 I understand what you are saying but with a beveled shaft "or what ever its called, I drew a blank"
the grub screw has to come out quite a ways before it spins on the shaft.
The Loctite will keep it from doing that.