Traxxas Slash 4x4 GPM CVD's upgrade Crash Test and unboxing

Update!!! Hot Racing makes a 12mm to 17mm hex conversion using the existing 12mm hex as the adapter rather than a hex pin. I previously did not think anyone made such a thing. That is excellent news for me so I can use 1/8 scale truggy wheels etc. here is the link to a review on them. Friggen brilliant!
• How To Fit Hot Racing ...
Been happy with the GPM CVD's so far on my Traxxas Slash 4x4. Handles the monster torque of a 1/8th scale esc/motor combo upgrade I did recently just fine. Due to the absence of hex pins, a 17mm hub conversion is not possible. So far that is my only gripe of these axles.
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[@RCunexttuesday]

We used some of these for our first giveaway on instagram a while back; took them out of one of our slashes... They look sweet and performed pretty well👏🏻

[@impossiblecrazyrc8299]

Great to hear you’ve had success with them. I broke the pin that secures the shaft to the rear differential...I was running in subzero temperatures so everything is at greater risk of snapping.

[@Valdemar-Perez-III]

Yo I just bought these for my rustler, they are awesome 👏🏽

[@impossiblecrazyrc8299]

Nice! They hold up to my 1/8th power system (Hobbyking SC8 and Castle 2650Kv).

[@Valdemar-Perez-III]

ImpossibleCrazy RC Hell yeah, hey I wanted to ask you , do those hot racing hexes fit those gpms or no??? Need to buy some

[@impossiblecrazyrc8299]

Donkey Commander i haven’t had the chance to buy them yet. I want to get a set so I can run 1/8 buggy wheels and tires. My 2.8 trenchers balloon too much.

[@tbnice9999]

What size lock screw fits it?

[@andresvillagomez75]

ImpossibleCrazy RC what’s the included washer for

[@markamd1]

GPM makes great parts! awesome vid mate!

[@firedupextremerc6066]

looks like a really solid build you're putting together

[@martins2657]

GPM is really easy to break with bigger wheels. I have Badlands MX28 with 9T pinion and on 3s it almost 100% to break in few first bashing. On 2s least longer. I had 2 pairs and move back to TRA6852A, because frequency of breaking is almost the same but price is 4times less. Sorry for my bad English

[@impossiblecrazyrc8299]

The bigger wheels do put more strain on the driveshafts on bad landings. Make sure your slipper clutch is tight but loose enough to allow the driveshaft to rotate on hard landings. 😎

[@martins2657]

@@impossiblecrazyrc8299 it usually breaks when wheelie MX28. On 3S. Or some soft bash on 2S. Rater have TRX HD plastic ones. Which are much more cheaper. Slipper clutch i have tightened. Because usually using street tires Prime 2.8 which have less grip than the Badlands and allows drift. But i have broken this steel cvds also in standard tight/loose slipper clutch on 3S when soft bashing

[@rcpatapouf]

The first thing i broke on this driveshaft are the tiny pins in the cvds

[@impossiblecrazyrc8299]

RC PATAPOUF sorry to hear about that man. I just snapped the set screw that secures to the transmission. It was my fault because of a bad landing and my slipper clutch was set too tight.

[@my89foxbody1]

Dang looks good! I put those on my slash and fell apart on the first run! That shrink wrap trick would have saved them! I just get stock.there super cheap and last for months!

[@TheRealHoltzy]

Take the anodizing off with oven cleaner. Make sure it's the nasty, caustic kind and leave for 5 mins at a time, rinsing off with warm soapy water to neutralise acid. I did these to Traxxas TRX parts, GPM parts and some Rofun wheel nuts. The "bumpy finish" GPM parts came up perfectly after around 15 minutes (the polished finishes may need less time), the TRX parts are VERY thinly anodised and the oven cleaner burnt the aluminium black (this is fixed by rubbing with steel wool in warm soapy water and polishing the part) so I would recommend only 5 minutes at a time and checking, the Rofun wheel nuts were perfect after 10 minutes

[@impossiblecrazyrc8299]

I did oven cleaner with a set of 2.2 crawler rims. It took some time but it worked! I used a dremel with a buffing bit to get the finish nice and smooth.

[@TheRealHoltzy]

@@impossiblecrazyrc8299 Nice! The polishing would have brought it up really nicely.

[@neptuned9774]

Hi i hot myself the updated Version and i Hope they will hold up

[@shawng7902]

Shrink tube idea was awesome.

[@impossiblecrazyrc8299]

Over time the shrink tubing slides off. Even then I didn’t have any issues with the springs unwinding. 😎

[@fergusonhr]

I just got these in the mail and thought they were a bit heavy...so I looked up videos and found yours...threw you a sub

[@impossiblecrazyrc8299]

The weight difference is noticeable when holding in your hand but I don't feel any difference in feel when driving. Actually weight in the shafts lowers your CG and will reduce your chances of a roll over. :)

[@rcmadnessstreetpirates6412]

Nice drive shafts!! Looks like a strong product👍👍👍

[@Basskingdom7]

I have the RCAWD? Don’t know how to install them?

[@garyrendano4717]

i bought the front and rear sets of the GPMs.. they look exactly the same size.. i dont think there is even a difference between front and rear.

[@rcnightlife9611]

Shrink tubing is a good idea. I've been using duct tape. 😆 👍😁. Just subscribed.

[@xleagenwarrobots7117]

When did you test them?

[@impossiblecrazyrc8299]

Summer of 2018!

[@user-do3sk8xx9v]

Can you put the original 14 mm hex ont this gpm shaft ?

[@rydirp]

I take back what I said in the past about these gpm axles. They suck in the long run, mine bind like crazy and i took good care of them too. I properly lubricated and did everything necessary to keep them running good. I just got to say it, they suck for long term use. I use mip x-dutys now. Edit: It turns out that I got ripoffs that were a close copy of the originals.

[@impossiblecrazyrc8299]

So did you get a set of original GPM’s? If so, how are they holding up?

[@rydirp]

@@impossiblecrazyrc8299 nah I never got original gpm axles. like I said I just run x-duty’s now.

[@travisdrury5556]

So o ring goes on spline

[@impossiblecrazyrc8299]

Travis Drury yes the o ring goes between the spline and the aluminum middle shaft.

[@ManuelOrtizification]

my only concern is how that extra weight effects everything else, it may not seem like much, but its extra strain on the bearings, diffs, center shaft, clutch, spur gear, pinion, and the motor. Just stuck a set on my slash, so this could end up being a very pricey experiment 😅

[@impossiblecrazyrc8299]

ManuelOrtizification I hear what you’re saying. The benefits outweighs the risks when using these CVDs over the stock ones IMO.

[@ManuelOrtizification]

Yeah, they are pretty solid, especially when you put them next to the plastic shafts which will snap in a stiff wind 😂 I ran 4 3s 5200mAh lipos through the slash with them on the weekend. Beat the absolute crap out of the slash, they are holding up just fine and(so far) bearings and gears seem to be dealing with the extra load alright for the moment 😆

[@impossiblecrazyrc8299]

Also, setting the slipper clutch tight but not too tight so that it “gives” on the hardest of landings will help save your gears, CVDs, and everything in between.

[@ManuelOrtizification]

Gotta keep an eye on the diff more than anything so far, seems to be where most of the strain is. Ended up packing my diffs with automotive grease to slow them down and smooth out the ride, has actually helped a lot.

[@RS-sv3bl]

Have a set of these in my 2WD Slash VXL. They are waaay better than stock, and much cheaper than the upgraded heavy duty traxxas items. They are heavier - true, and I have stripped the idler gear a few times in the gearbox through extreme abuse (think full throttle high speed runs with 28T high-speed pinion on tarmac with slicks, doing full throttle then full reverse to brake and stop crashing. Multiple runs before gear strip.) No issues from driveshaft under these conditions. I put this down more to the Hot Racing sealed diff I have in there where the teeth engagement is less than stock. Only issue I can see with these is the ‘balance’ - ie. When you have the car on a stand and hit throttle and watch the driveshafts = they wobble slightly as they are not perfectly in a straight line. Overall have run for a couple of years they have held up very well. Well worth the upgrade

[@4wdsctracer160]

Are these the same as Fast Trax CVD’s for the slash?

[@impossiblecrazyrc8299]

They look very similar. I don't know dimension wise if they are the same. Kevin Talbot does a very entertaining review on the Fast Trax CVD's. Gawd that guy is funny.

[@impossiblecrazyrc8299]

If you're wondering about durability, I've got 2.8 Trenchers on Proline rims with a 1/8th Hobbywing esc/castle motor combo and the GPM's have held solid so far. But then again I don't bash as hard on this setup as I do with my SCT wheels on. If you got the SCT wheels on, you can bash your truck as hard as you want and these CVD's will take it. Cheers!

[@cali357]

How are those holding up

[@impossiblecrazyrc8299]

Tony Mosthated They are great! The weak point of these are the screw pins that secure it to the output shaft of the differential. That is the best place to break because they are cheap to buy and easy to replace! I keep a few spares in my toolbox 🧰 😎

[@cali357]

@@impossiblecrazyrc8299 great sounds like they good to me if u could replace them

[@fireuprc5693]

Hi mate nice video- subscribed:) how much would you recommend these shafts?

[@impossiblecrazyrc8299]

They are definitely a buy. Purchase extra set screws as they are the weak point (good thing).

[@guillaumedubois8896]

What size heat shrink tube 🤔 and how long did it hold

[@impossiblecrazyrc8299]

Can’t remember what size. It held for at least a dozen battery packs of hard running.

[@loaizafilmz1109]

Hi buddy how did they pull along since you installed them??

[@impossiblecrazyrc8299]

Sorry for late reply! They’re still doing good. The weakest “link” is the set screws. I bought extras cuz they’re cheap.

[@loaizafilmz1109]

@@impossiblecrazyrc8299 no worries it’s all good thanks for the reply!!! Better late then never !!!

[@aquarium8940]

Greetings from Russia. Do you recommend a gpm drive?

[@impossiblecrazyrc8299]

Yes I do! Just be sure to use thread locker on the screws so it does not come loose. I am currently running it with Hobbywing SC8 esc and Castle Creations 2650KV motor on 3s Lipo. Lots of power and the drive shafts haven't exploded yet.

[@aquarium8940]

@@impossiblecrazyrc8299 Thanks

[@Jesus-warrior]

No link to buy?

[@impossiblecrazyrc8299]

Working on it! 😎

[@zadokwright8904]

how long did these last? did they stand up to lipo power?

[@impossiblecrazyrc8299]

They do last and hold up much better than the stock shafts. I'm running a 1/8 scale Hobbywing power system and 2.8 Proline trenchers. So there's lots of torque and a lot of extra weight. The weakest link is the grub screw/pin that secures the shaft to the differential. I have snapped a couple due to bad one wheel landings. I bought 3 pairs from GPM to have in my toolbox. Only takes 3 minutes to repair and I'm back out bashing again. I adjusted the slip on slipper clutch and haven't broke yet on hard landings. Thanks for watching!

[@martins2657]

Today. I just broken another GPM... had 2 pairs of rear and its easy to break with Badlands MX28. Today it has been broken near wheel hub. But also near rear diff i had broken it in the past. Im moving to Traxxas HD plastic TRA6852A. Only reason is, these metal/aluminium are broken so often with the bigger wheels. And rather buy 2 pairs plastic every 2 months, then one pair of metal/aluminium

[@smitheshn6637]

Hello... What is the washer size that Traxxas provided with their stock hex to put in CVD

[@impossiblecrazyrc8299]

Hi! It’s a 5x8x0.5 mm. It’s traxxas part number 1985. 😎

[@Norcorider209]

I had a problem with the hexes coming loose even with loctite. I would have to retighten them every time I would take it out. Eventually one came loose and I didn’t realize it. It allowed the axle to dig into the aluminum rear carrier and toasted it. Anyone else have this problem with the hexes coming loose?

[@impossiblecrazyrc8299]

StretchFPV sorry to hear about that. My hexes have stayed in place so far even with some 60mph speed runs and lots of mild bashing.

[@Norcorider209]

ImpossibleCrazy RC the fronts seem to be better I’ve only had to retighten them once. It was probably bad set screws in my opinion.

[@joeyfesta2042]

It looks to me like you got the Chinese version my friend I have the exact same ones same exact color.No numbers written on it only the letters GPMI can’t get the pin to stay in very poor design. It’s only as strong as its weakest link which is the pin connecting the ball to the cup.

[@impossiblecrazyrc8299]

Mine are holding up well with 2.8 trencher tires and a 1/8th esc and motor system. The pin that holds the shaft to the differential is another thing. Those snap once in awhile but it’s a quick fix and they are cheap. I have a dozen spares.

[@raven2wolfbane6045]

What kinda of piggyback shocks you have on your slash 2wd?

[@impossiblecrazyrc8299]

They are Integy. I would not recommend them. They leak even after cleaning and properly bleeding the air out.

[@sandysoos7509]

Are thay easy to install

[@impossiblecrazyrc8299]

Yes they are! Remove a a few screws and voila!

[@whiteyguitar666]

Where does the rubber o ring fit ?

[@impossiblecrazyrc8299]

It goes between the middle aluminum piece and end shafts. It's purpose is to absorb pressure so you don't have metal to metal contact.

[@whiteyguitar666]

@@impossiblecrazyrc8299 Thanks for getting back to me, i'll take them back off now then lol

[@travisdrury5556]

Can you be more specific im a lil slow so the o ring goes on the spline?

[@multipreach2674]

@@travisdrury5556 you can see the o ring goes between the centre shaft and the outdrive which goes on to the diff. You can see it there on the title pic.

[@kitchenbriks3685]

Robust

[@murphy101ification]

Just a quick 1. What bearing did you use on the inside on the front steering knuckle thing .

[@impossiblecrazyrc8299]

Hi! The bearing size is 10x15x4 mm. Cheers!

[@MrUNDERSTAND562]

This video was pretty robust.......lol

[@darrellstevenson6625]

How are they still holding up???

[@impossiblecrazyrc8299]

I haven’t run it much lately but still runs solid. Only issue I’ve had with them is the grub screws breaking...but that’s a good thing because they are easy and cheap to replace.