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-   -   TRX4 Sport Teardown and Restoration Thread (http://www.rccrawler.com/forum/traxxas-trx-4/630947-trx4-sport-teardown-restoration-thread.html)

casco_bay_rc 01-12-2023 07:01 AM

TRX4 Sport Teardown and Restoration Thread
 
I have two boys, and they are hard on our RC rigs. But repairing and upgrading those broken parts is half the fun of this hobby.

This TRX-4 Sport is one of our first crawlers and has seen many adventures. I'm proud of its patina.

But the gears are crunchy, the mud has worn down some bearings, and it's time for a restoration.

Most recently, we put a plow on it to help clear snow up here in Maine, which has increased the stress on the drivetrain.

https://i.postimg.cc/Bvv80vyn/TRX-4-...oration-36.jpg

https://i.postimg.cc/1RVqXfzg/TRX-4-...oration-30.jpg

Here are a few shots of the "patina":

https://i.postimg.cc/qvwtSK1F/TRX-4-...oration-35.jpg

https://i.postimg.cc/L83fSw8N/TRX-4-...oration-27.jpg

https://i.postimg.cc/PfCmDSS5/TRX-4-...oration-25.jpg

https://i.postimg.cc/s2K2HRgC/TRX-4-...oration-23.jpg

https://i.postimg.cc/DZ8bqzdM/TRX-4-...oration-31.jpg

https://i.postimg.cc/dtMTyw75/TRX-4-...oration-32.jpg

So, let's tear this down and inspect:

https://i.postimg.cc/qBW2x2FX/TRX-4-...oration-22.jpg

https://i.postimg.cc/g2FrnDTQ/TRX-4-...oration-17.jpg

https://i.postimg.cc/Gtf87nzm/TRX-4-...oration-15.jpg

https://i.postimg.cc/J4gZKZd5/TRX-4-...oration-14.jpg

https://i.postimg.cc/T13gN96C/TRX-4-...oration-13.jpg

https://i.postimg.cc/kMHm5gpp/TRX-4-...oration-02.jpg

Follow along for the next step: degrease, soak the greasy bits, and inspect the parts.

casco_bay_rc 01-12-2023 03:45 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
I soaked all of the metal overnight to de-grease. I use a combo of mineral spirits first, Chemical Guys De-greaser for the plastics, then some Isopropyl to finish it.

I replaced all of the hardware with stainless and replaced the crunchy bearings. All parts have been lubed, and I used Traxxas's gear grease on all the gears.

Time to rebuild:

https://i.postimg.cc/mrqsBQZr/TRX-4-...oration-54.jpg

https://i.postimg.cc/bvdh76hM/TRX-4-...oration-53.jpg

https://i.postimg.cc/N0PgF3DB/TRX-4-...oration-52.jpg

https://i.postimg.cc/d1bwmGgf/TRX-4-...oration-51.jpg

https://i.postimg.cc/3ww8K8gt/TRX-4-...oration-50.jpg

https://i.postimg.cc/JzM72ctV/TRX-4-...oration-49.jpg

https://i.postimg.cc/PfCCW4vS/TRX-4-...oration-48.jpg

https://i.postimg.cc/NMfgjgmN/TRX-4-...oration-47.jpg

https://i.postimg.cc/5NFf0KQM/TRX-4-...oration-46.jpg

https://i.postimg.cc/PrL5Drc9/TRX-4-...oration-45.jpg

https://i.postimg.cc/T1t537Kb/TRX-4-...oration-44.jpg

https://i.postimg.cc/kgz8SpfF/TRX-4-...oration-43.jpg

https://i.postimg.cc/bwJHkb88/TRX-4-...oration-42.jpg

https://i.postimg.cc/yYrSqG44/TRX-4-...oration-41.jpg

https://i.postimg.cc/K86kjg80/TRX-4-...oration-40.jpg

https://i.postimg.cc/bJH2KN83/TRX-4-...oration-39.jpg

https://i.postimg.cc/W3jd6Lrr/TRX-4-...oration-38.jpg

https://i.postimg.cc/1tHfvCcd/TRX-4-...oration-37.jpg

Next step: Refurbish the steel suspension links and replace rod ends as necessary.

casco_bay_rc 01-13-2023 03:46 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
Sanded the rust off of the rails. I'll hit it with a quick blast of black enamel.

https://i.postimg.cc/MTmjKwV6/TRX-4_...oration-55.jpg

Put the shocks, pivot balls, and rod ends through the ultrasonic cleaner.

https://i.postimg.cc/VNRYJkGV/TRX-4_...oration-65.jpg

https://i.postimg.cc/gknr18Sk/TRX-4_...oration-60.jpg

https://i.postimg.cc/SsdJbrbj/TRX-4_...oration-58.jpg

Drained the shock oil and put fresh 40wt in.

https://i.postimg.cc/BQVPvMLK/TRX-4_...oration-56.jpg

Sanded the rust and painted off the links. I might leave them brushed and put some clear enamel on them.

https://i.postimg.cc/yNB16ZPR/TRX-4_...oration-64.jpg

https://i.postimg.cc/1zp8JSWG/TRX-4_...oration-61.jpg

casco_bay_rc 01-14-2023 05:05 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
Axles and transmission are assembled, lubed, and ready:

https://i.postimg.cc/9F4D1DwS/TRX-4-...oration-77.jpg

The rails are ready. Drivetrain assembled:

https://i.postimg.cc/MHLvqSNd/TRX-4-...oration-75.jpg

The brushed (stock) links look at home here:

https://i.postimg.cc/gjjnCJSx/TRX-4-...oration-74.jpg

https://i.postimg.cc/T3DW2KRm/TRX-4-...oration-71.jpg

Let's complete the chassis:

https://i.postimg.cc/ncMD5dg3/TRX-4-...oration-68.jpg

https://i.postimg.cc/1z0n6bV3/TRX-4-...oration-67.jpg

And let's not forget the upgrades:

https://i.postimg.cc/bJzGRL1H/TRX-4-...oration-66.jpg

AK KRAWLER 01-14-2023 07:05 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
Looking awesome so far man and great documentation!!!

casco_bay_rc 01-14-2023 07:14 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
Quote:

Originally Posted by AK KRAWLER (Post 6130375)
Looking awesome so far man and great documentation!!!

Appreciated buddy. I'm surprised with how the links turned out with a little sanding. They look aftermarket. I slapped a coat of matte clear enamel on them, too.

B-MOW71 01-14-2023 09:07 PM

TRX4 Sport Teardown and Restoration Thread
 
Nice write up and detailed pics. Rig looks to be in pretty good shape.

You mentioned that you cleaned with a ultrasonic cleaner. By chance would you have a pic of it or know the brand? I’ve been looking to get one but have no idea what to buy. Thanks.


Sent from my iPad using Tapatalk

twade984 01-14-2023 09:14 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
Excellent! It looks great


Sent from my iPhone using Tapatalk

casco_bay_rc 01-17-2023 06:48 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
After a brief respite in the mountains, I got back to it.

I applied a vinyl/plastic protectant to all the soft parts, and the results were stunning. These parts look new, and they repel dirt and water quickly.

https://i.postimg.cc/4nCzKMCx/TRX-4-...oration-78.jpg

I painted the body between adding parts back to the chassis.

https://i.postimg.cc/G22P6GJd/TRX-4-...oration-80.jpg

I painted the bed, flares, and sills with truck bed paint. I'm hoping once I remove the masking, it turns out okay :shock:

https://i.postimg.cc/V6V9wvDM/TRX-4-...oration-79.jpg

https://i.postimg.cc/pr5fLv6S/TRX-4-...oration-81.jpg

casco_bay_rc 01-17-2023 06:49 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Quote:

Originally Posted by twade984 (Post 6130393)
Excellent! It looks great


Sent from my iPhone using Tapatalk

Thank you "thumbsup"

I'm almost done with it. It's incredible what severe cleaning, sanding, and care can do to a five-year-old abused rig to make it look new(er) again.

casco_bay_rc 01-17-2023 06:57 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Quote:

Originally Posted by B-MOW71 (Post 6130392)
Nice write up and detailed pics. Rig looks to be in pretty good shape.

You mentioned that you cleaned with a ultrasonic cleaner. By chance would you have a pic of it or know the brand? I’ve been looking to get one but have no idea what to buy. Thanks.


Sent from my iPad using Tapatalk

Thank you. "thumbsup"

I bought a cheap unit off of Amazon, and that lasted for a few months :ror:

I then bought a slightly nicer unit online: Here

And this one has lasted longer.

The key to these cleaners, I've found, is to find the right solution to degrease parts, remove dirt, or brighten them up. Water alone does nearly nothing. You need to add a surfactant.

OSRC 01-17-2023 08:13 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Very nice, love a good rebuild thread. There's something very satisfying to taking a beat up R/C and bringing it back to new. That looks better than new!

Wow, that ultrasonic cleaner does wonders...I do it the old fashioned way with hot soapy water, a couple of brushes and a few choice curse words and my parts never get fully clean - there's a lot of "nooks and crannies' that are hard to get into.

casco_bay_rc 01-17-2023 02:22 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
It turns out my masking was okay. So, here's the final product:

https://i.postimg.cc/P5xKZ1Mv/TRX-4-...ration-090.jpg

https://i.postimg.cc/gcgZhQt4/TRX-4-...ration-112.jpg

https://i.postimg.cc/mkp1G11K/TRX-4-...ration-111.jpg

https://i.postimg.cc/FRZJDBrr/TRX-4-...ration-109.jpg

https://i.postimg.cc/TYhWJ0Zx/TRX-4-...ration-113.jpg

https://i.postimg.cc/1z0g3jNG/TRX-4-...ration-117.jpg

https://i.postimg.cc/26z1b74P/TRX-4-...ration-118.jpg

https://i.postimg.cc/MTdvyf5X/TRX-4-...ration-119.jpg

https://i.postimg.cc/tJJ7DRvk/TRX-4-...ration-120.jpg

https://i.postimg.cc/tJj2Vfr9/TRX-4-...ration-082.jpg

https://i.postimg.cc/bv46qdkD/TRX-4-...ration-083.jpg

https://i.postimg.cc/Vsq7cf6v/TRX-4-...ration-086.jpg

https://i.postimg.cc/t4Mkz7rS/TRX-4-...ration-091.jpg

https://i.postimg.cc/DfPcMxjb/TRX-4-...ration-092.jpg

https://i.postimg.cc/gkMHYnPz/TRX-4-...ration-093.jpg

https://i.postimg.cc/W3M7j8sC/TRX-4-...ration-094.jpg

https://i.postimg.cc/0QgCLF17/TRX-4-...ration-095.jpg

https://i.postimg.cc/SRd7YK2G/TRX-4-...ration-096.jpg

https://i.postimg.cc/HsWtDbRv/TRX-4-...ration-097.jpg

https://i.postimg.cc/MpvbXqWy/TRX-4-...ration-098.jpg

https://i.postimg.cc/g2QyZQJ1/TRX-4-...ration-099.jpg

https://i.postimg.cc/0NSYdnKj/TRX-4-...ration-100.jpg

https://i.postimg.cc/C1Vjv8bN/TRX-4-...ration-101.jpg

https://i.postimg.cc/JncjShqW/TRX-4-...ration-102.jpg

https://i.postimg.cc/C5hb0VPn/TRX-4-...ration-103.jpg

https://i.postimg.cc/6qMn51gj/TRX-4-...ration-104.jpg

https://i.postimg.cc/zXfTP8H9/TRX-4-...ration-105.jpg

https://i.postimg.cc/kg6Kqscs/TRX-4-...ration-106.jpg

https://i.postimg.cc/0yTmQSXs/TRX-4-...ration-107.jpg

https://i.postimg.cc/Bv2F1vR1/TRX-4-...ration-108.jpg

https://i.postimg.cc/Y0CLVz01/TRX-4-...ration-110.jpg

https://i.postimg.cc/7YcJs7k2/TRX-4-...ration-114.jpg

https://i.postimg.cc/T3DLZwdH/TRX-4-...ration-115.jpg

https://i.postimg.cc/Gpn8rC93/TRX-4-...ration-116.jpg

casco_bay_rc 01-17-2023 02:30 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
To summarize:
  • I tore down my sons' TRX-4 Sport with Traxx to individual parts, nuts, and bolts.
  • Cleaned each part with an ultrasonic cleaner.
  • Degreased all of the drivetrain parts.
  • Sanded down metal and plastic parts to even out the finish.
  • Sanded the rust off the chassis rails and hit it with matte black enamel.
  • Created a brushed finish on the suspension links.
  • Re-assembled the drivetrain with fresh grease.
  • Re-filled the shocks with new 40wt.
  • Painted a new body in Lime Pearl with the bed, flares, and sills in truck bed coating paint.
  • Applied vinyl protector to all soft parts to restore the finish.
  • Added Traxxas's winch.
  • Add a full lighting system to the body and expedition rack.
  • Replaced every fastener with stainless steel equivalents.

I put the original set of wheels and tires back on while I start the restoration of the Traxx. I'll post that in a separate thread.

DirtMerchant 01-17-2023 03:23 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
That's some satisfying work. I bet the boys love it.

B-MOW71 01-18-2023 06:35 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Man, that looks brand new! Excellent work!

I think the body turned out great! Great color and the black textured accents on the outside look great too!

Thanks for the info on the ultrasonic cleaner."thumbsup" I really need to pick one of them up!

casco_bay_rc 01-18-2023 06:47 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Quote:

Originally Posted by B-MOW71 (Post 6130670)
Man, that looks brand new! Excellent work!

I think the body turned out great! Great color and the black textured accents on the outside look great too!

Thanks for the info on the ultrasonic cleaner."thumbsup" I really need to pick one of them up!

Thanks, bud "thumbsup"

The only new parts on it are the body, the 400 servo, the lighting kit added later, and the winch. All the plastic/nylon parts are original, and all the suspension and gearing components are. I only had to replace a handful of crunchy bearings. If you look closely, you can still see battle scars.

You can't go wrong with an ultrasonic cleaner.

CosmoM3 01-24-2023 04:57 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Great documentary. I did something similar just last week in my Sport.

The only thing I would have addedto your upgrades would be the bearings. They will rust and corrode eventually and upgrading them to stainless steel to replace the chrome steel would have been a worthwhile investment, The factory bearings had to be tossed out as they were beyond repair after owning the truck for only 4 months (through all the elements).

casco_bay_rc 01-24-2023 07:02 AM

Re: TRX4 Sport Teardown and Restoration Thread
 
Quote:

Originally Posted by CosmoM3 (Post 6131054)
Great documentary. I did something similar just last week in my Sport.

The only thing I would have addedto your upgrades would be the bearings. They will rust and corrode eventually and upgrading them to stainless steel to replace the chrome steel would have been a worthwhile investment, The factory bearings had to be tossed out as they were beyond repair after owning the truck for only 4 months (through all the elements).

I tested each bearing after cleaning, and only a few were too crunchy to save. These bearings, too, went through a lot of submersion in snow and mud.

Upon reinstallation, I put a drop of bearing lube (the kind racers use), which seems to mitigate rust. I do this with all of my RC vehicles.

But, your suggestion would be the best upgrade over all of that.

https://i.postimg.cc/ydT28N4q/TRX-4-...ration-121.jpg

58_Willys 01-24-2023 08:21 PM

Re: TRX4 Sport Teardown and Restoration Thread
 
That green is just down right sexy. Fantastic overhaul... "thumbsup"


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