Arrma 1/10 4wd Hot Racing shock build

Hoss81

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Granite, Kraton 6s
Like many if you I have gone back and forth about what to do with my crappy leaking factory Granite shocks. No matter how I have tried to rebuild them they just never can consistently stay sealed.

I've tried the cheap ebay shocks and they worked for a while but when I lost a spring retainer with no easy way to buy a replacement I went back to the drawing board.

I, as a rule of thumb, am NOT a fan of most Hot Racing products. However, they seem to be the most affordable option to possibly solve this issue. So, I pulled the trigger.

My factory rear shocks were destroyed trying to prevent them from leaking. So I had to buy the following part numbers to complete the rear shocks:

Hot Racing ATF155AR08
Arrma AR330537
Arrma AR715008
Arrma AR709012
Arrma AR330451
Arrma AR330515 - I had a pack of these laying around but I believe this is the right part#

Step 1: installing the plastic sleeve, o-rings, and retaining disc onto the cartridge.

This is all fairly easy, there are no instructions so I had to fiddle with it until i figured out the right order.
1. Small plastic sleeve smallest side down
2. Both o-rings
3. Retaining disc smallest side down.
See pictures for orientation.

I have always used a dab of Vaseline when assembling shocks. Their are better products but that has always worked for me. Just a little bit on the orings help ease the installation of the shock shaft.

From here, fill with oil. I went with team associated 42.5 because it's all I had. I didn't have enough 50wt to complete the shocks and the next highest i had was 80, which i think is too much for such a light truck.

The only difficult part of this build I had was getting the o-ring retaining disc seated into the bottom of the shock body. It is very tight. I used my 1.5mm hex wrench to gently push along each edge until it was seated. Once this is seated though, the rest of the process is easy.

The last note is that you are going to overfill these shocks. I had to bleed a good bit out of the screws to get it to where I could have full travel of the shock.

Assembly thoughts are they look promising. The o-rings seemed to be of good quality, they fit snugly into the cartridge. We will see how they do after some abuse. They certainly look better than the factory ones.
 

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Yonic

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Yes, they solve the leaking completely, i'm almost a year on my shocks and i never refilled the oil in them.

One thing to note is that the length is not compeletly like stock, and so it will change the handling, better for jumps but worst for turns.
 
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Nice!

I rebuilt the stock one yesterday. I bought slightly larger o-rings and replaced one of the the two o-rings with the larger one (the cap would pop off with two larger o-rings, so I replaced only one). We'll see how that goes. That HR upgrade looks like an interesting solution if my mod doesn't work out.
 

Hoss81

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Granite, Kraton 6s
Nice!

I rebuilt the stock one yesterday. I bought slightly larger o-rings and replaced one of the the two o-rings with the larger one (the cap would pop off with two larger o-rings, so I replaced only one). We'll see how that goes. That HR upgrade looks like an interesting solution if my mod doesn't work out.
I had the most luck with the stock shocks using teflon plumbers tape to wrap the threads. I got a little over-zealous though on the last attempt and put too much on and messed the shock body all up.
 

ssands85

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I just got my granite V2 back together with the hot racing shock bodies. All I have to say is WOW. Perhaps my stock shocks were leaking from day 1, but I don’t remember the truck handling this well out of the box... I did also wind us using the springs from my eBay big bore shocks, as they were progressive springs. They have a lower spring rate closer to the ends of the springs, and get more firm the more they are compressed. I also rebuilt the front and rear with team losing racing 50wt. Haven’t gotten to run a large amount, due to the front bearing in the motor being wiped.... but they aren’t leaking yet, and I’ve got a ramp I built, that I can land a double backflip onto flat from.🙂. I would recommend the hot racing shock bodies.

4910F8F5-6DF0-4CD9-AA37-97D72D05D009.jpeg

7A004BFD-EC54-45BE-993F-6913FC9FB5A2.jpeg
 

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