Big Rock Big rock broke after only three 2s batteries.

[Neelis]

Skip the aluminium pivot balls and look at the Traxxas 5525 and 5529 parts.

If you check out my built topic, you will see a lot of the common 3s upgraden.

 

[Haastnooit]

Cheaper …

https://nl.aliexpress.com/item/1005..._main.178.4fca79d2PxsI3e&gatewayAdapt=glo2nld

 

[Neelis]

Cheaper …

https://nl.aliexpress.com/item/1005..._main.178.4fca79d2PxsI3e&gatewayAdapt=glo2nld

You cannot be more right.

But they don't last.

 

[Haastnooit]

I have not experienced any problems with the Ali pivotballs thus far. I have been running them for about 3/4 year on the Big Rock. I agree the Traxxas Jato (long) and Revo (short) rodends are a solid choice, those were the choice for rodends for every comp crawler build back in the day.

 

[slick2500]

Welcome ! As mentioned above you experienced one of the most common issues that will occur when bashing the 3S line up.

You will probably run in to spurgear damage as well, mostly due to dirt accessing the power module and getting trapped. Some try to seal up the power module with the soft side of velcro to prevent dirt from entering. Others make a slot in the chassis below the power module to let dirt out. Another possible cause of spur gear damage can be a warped motor plate. The motor is “hanging” on the plate and the inertia of the motor will bend the plate on hard landings. You can install a 3D printed endbell support to prevent this damage. When the motor plate is bend it will ruin gear mesh between pinion and spur and cause spurgear damage.

When running in dirt you will probably experience sloppy links somewhere down the line. The composite balls in the rodends wear easily due to the abrasion of the dirt. You can replace them with aluminum pillow balls.

check

I wish I could remember the part number for the steel Associated pivot balks that fit.

You cannot be more right.

But they don't last.

Yeah the aluminum wears out pretty quick.

 

[Mxcx]

Welcome ! As mentioned above you experienced one of the most common issues that will occur when bashing the 3S line up.

You will probably run in to spurgear damage as well, mostly due to dirt accessing the power module and getting trapped. Some try to seal up the power module with the soft side of velcro to prevent dirt from entering. Others make a slot in the chassis below the power module to let dirt out. Another possible cause of spur gear damage can be a warped motor plate. The motor is “hanging” on the plate and the inertia of the motor will bend the plate on hard landings. You can install a 3D printed endbell support to prevent this damage. When the motor plate is bend it will ruin gear mesh between pinion and spur and cause spurgear damage.

When running in dirt you will probably experience sloppy links somewhere down the line. The composite balls in the rodends wear easily due to the abrasion of the dirt. You can replace them with aluminum pillow balls.

check

Thanks for the info and the video links. Good looking out! I appreciate all the info I'm getting here. With the help so far I got it back together and it was pretty easy.

Skip the aluminium pivot balls and look at the Traxxas 5525 and 5529 parts.
View attachment 326769

If you check out my built topic, you will see a lot of the common 3s upgraden.

Ok great I will.

 

[Just a hobby]

Inner stub axle screw came loose..
It happens.
No big deal.

Just a dab of loctite and re-screw it on.

You need a long hex driver (I think it's a 3mm or is it 2.5mm, someone please correct me.) to reach down into the driveshaft to tighten.

You might want to double check all the other screws while you're at it.

Bash on!

2 mm

 

[SrC]

Yep I like your advice been looking at both options. Searching market place now and I might be able to pick up a 2wd boost and a blx as a package with 5 batteries and 2 chargers for a good price then I have my blx and two brushed models so I can have one of my kids or someone else join in. I didn't think I would get this addicted already

This hobby will absolutely suck you in... and fast.
Will suck your wallet dry if you are not careful and smart about it.
Yet sometimes you just can't put a price tag on the fun you get in return.
Especially when the whole family/children are all in.

 

[Mxcx]

This hobby will absolutely suck you in... and fast.
Will suck your wallet dry if you are not careful and smart about it.
Yet sometimes you just can't put a price tag on the fun you get in return.
Especially when the whole family/children are all in.

Already sucked in and it's too much fun. Took one of my daughters out with me today and she loved it. She drove the brushed senton and the motor burnt out so I let her try the big rock and she loved that. So I'm now on market place looking for and another stunt truck and I will rebuild the senton brushless. I told my daughter today " see this is why I need more than 2 in case one breaks we have an extra"