Traxxas UDR - Full Option Build

[YetiScore83]

So..... Where to start. A few know that I have owed a number of Traxxas UDR, and have ended up being tempted by somthing else and sell up, only to end up regretting and buying another!! 

 

So after the final loop and selling my Tekno Et48, Kraton 8s and Losi SRR, I found myself wanting to build my dream UDR. Now this won't be everyone's cup of tea, it won't be a Basher, it's won't be a crazy scaled build.. It will be somewhat of a hybryd, bringing together all the bits I love and learned over the various UDR builds I've done. 

 

I set a time line for about 4 weeks to get this finished based on the parts that have been ordered and the lack of spare time I have. 

 

The journey starts as always with the search for thr base truck, I Considered even a scratch build, but determined it was a waste, so started with the used market.. Well.. Not much out there, most available have appeared to have had a hard life or just too much money. The cost of a new one has increased to over £900 in the uk!! But then I got a lead on some stock in Germany... They only had the rigid industries body, but had the bonus of the expensive full option light kit.. And at £710 delivered it ticked all the boxes!! 

 

The truck arrived last week, and the first job was a complete strip down! Some parts have alrwsdy gone to new homes, body, wheels, motor, esc, arms, shock shafts etc.. Which helps funds the plans! 

 

Then i started to tackle the front end and centre transmission. Pretty straight forward, switching the plastic housings to Vitavon aluminium in a one off gold anodizing! Plastic diff cups were exchanged for the traxxas Aluminium ones. Planetary housing and ring gear changed to the Vitavon aluminium and hardened gear. 500k weight diff oil in the front and 1m in the centre, gearing will be set at 55/31 for now. 

 

Also got rid of the pathetic stock Fronr shft and replaced with the traxxas HD dog one one. 

 

Next up.. Rear axle 

[Tug]

I never knew so many hop-ups existed for the UDR.

 

When you're finished and ready to sell, hit me up! 😂

[YetiScore83]

I think you can get 90% of a truck in aftermarket parts now 😎

[Tug]

That's typical Traxxas, they need aftermarket support!

[Bajadre]

looking good man some great hopups there !!

[FB333]

Can't wait to see how this progresses - I really like the UDR.

[YetiScore83]

Didn't have the time I hoped yesterday, so didn't get the cage dyed plus the final aluminium diff cup didn't arrive for the rear axle, so was limited with what I could do. 

 

I did however start to attach the sub assemblies in the chassis, centre chassis in, front bulkhead in and joined with the new Traxxas HD dog bone front shaft.

 

Also replaced the stock plastic servo mount with an aluminium one from GPM, there are a few of these on the market from different suppliers, but more or less all the same, the gpm was the easiest to get hold of for me. 

 

Then installed the new servo, didn't go to crazy and stuck with the trusty HV Savox 1210,thiw is fully waterproof and has plenty of torque on 7.4v.

 

Lastly mounted the front lower arms and gpm front hinge pin brace. 

 

Starting to

 

[YetiScore83]

Time for an update... The last few days have been pretty productive... 

 

First up was the rear axle, I decided to do the open diff mod on this one. So bought the gear set along with a HR aluminium diff cup.  

Planetary housing and ring gear were also replaced with the vitavon Aluminium version. 

 

Next up was the cage, really don't light the grey plastic look, so decided to strip it down (like a million screws!) and RIt dye it all black.. So submerged it in a container of warm water and a sachet of RIt overnight, never fails. Came out lovely. 

 

Then it was time to remember where all the different screws went and put it back together. I also found time to paint the scale accessories on the rear, must admit not my strongest point but happy enough with the results. 

 

Added some spare tire straps off ebay, the traxxas Aluminium inner cage panels and traxxas nets. The the iceing on the cake.. A one off functional fan and led setup, bolted straight up to the existing cage perfect!! 

 

Then mounted the hole lot to the chassis and connected the front upper a arms (vitavon gold) and aluminum steering links (vitavon black). 

 

Finally job for now was to connect the rear axle, used vitavon lower arms and upper links, HR suspension limiting straps and finally the V3 vitavon drivehafts 

[Tug]

Simply stunning. 

[willb]

Uh oh... I really want another UDR after selling mine (it was bad but I always regretted selling it). This thread isn't helping 😂

 

Just why are they £200 more than they were?

[YetiScore83]

5 hours ago, willb said:

Uh oh... I really want another UDR after selling mine (it was bad but I always regretted selling it). This thread isn't helping 😂

 

Just why are they £200 more than they were?

 The price really shot up in the uk, luckily there are still some decent deals in Germany. I saved over £200 over the uk list price on this one. 

 

If you have "contacts" in the states that can sneak you one in, they are nearly half price 😕

[YetiScore83]

May aswell update... So traxxas light kit was tinted blue and fitted 😎, still need to tidy up the wiring but a lot more to come electronic wise so no rush. 

 

Also fitted front and rear Vitavon sway bar kits, worth noting the front kit only works with the stock front bumper skid not the rpm one. Will have a look later if it can be modified to fit. 

 

Motor mount is out ready to make the holes bigger to accept the Hw 1650kv

[YetiScore83]

Hi bit more progress to report... 

 

The hobbywing 1650kv motor is in, couple or small mods to accept it.. Mostly to the motor mount but also had to trim the rear lip of the chassis a little. Currently on 51/34 gearing but plan to change to 55/34.

 

Also mounted a nice 12v fan, not the most premium fan on the market but for a few £'s it should be fine. 

 

Then.. Fitted the one off scale motor and cut and mounted the body ready for paint. 

 

Shock caps still not arrived, so no shocks fitted hence the slammed look. 

 

Next job.. Paint the body and sort out the electrics 😛

[Acidsnow]

Mighty fine work YetiScore83, lookin'

forward to seeing what you do wi' the paint. 

[froggy8]

On 14/10/2020 at 11:49, YetiScore83 said:

Hi bit more progress to report... 

 

The hobbywing 1650kv motor is in, couple or small mods to accept it.. Mostly to the motor mount but also had to trim the rear lip of the chassis a little. Currently on 51/34 gearing but plan to change to 55/34.

 

Also mounted a nice 12v fan, not the most premium fan on the market but for a few £'s it should be fine. 

 

Then.. Fitted the one off scale motor and cut and mounted the body ready for paint. 

 

Shock caps still not arrived, so no shocks fitted hence the slammed look. 

 

Next job.. Paint the body and sort out the electrics 😛

Any news on this yet?

 

[YetiScore83]

Yes, sorry all I got distracted and then sort of lost interest in it. Its virtually done, just been stuck on the final 1% for the last few weeks, need to find thr motivation to get it done. 

 

Since the last update, the Hot Racing shock caps and toes, Traxxas TiNI shafts and Blue anodized bodies arrived. So build up the shocks with firmer Green and Blue springs, I need to reevaluate that though as it looks to be a little too firm now in the front. 

 

I Also swap out the front CVD for rhe new Hardened steel versions from Vitavon, as well as being a tougher material they are thicker especially in the dogbone necks, so should be super strong! 

 

The 1650kv motor is in and new gearing 55/31, I Alos change the Rearopen diff cup to the aluminium one. All fired up and running nice and smooth.. Result. 

 

Then started to tackle the minefield of wiring in this thing. It has the standard traxxas led kit.. But that is not compatible with the Hw max 6 Esc. So I have installed an old broken Vxl6s esc as a power source for the lights.. Amazingly is works. 

 

Functional rear fan cluster wired up too. 

 

Then I sent the body off for paint.. This build was a tribute to a trophy truck "Big Oly" not a scale replica just a tribute, but I'm pleased how thr body came out. 

 

The 1%.left to finish... Wire up and mount the front Halo lights and rear tail light, install the interior and then a full shake down. 

 

A few photos for you.... 

[Ag100]

Wow, that looks amazing!👍🔥

[Mack1]

Looks fantastic.  Loving the colour scheme and wheel combo.

[Redback]

This is my dream car, ive given up on an axial yeti and think this vs the losi is a no brainer, with losi weirdness and traxxas standards, what do you think?
One day, ill have one till then ill enjoy watching others play with theirs, how she perform with all the upgrades, i guess she doesnt get bashed much?

[ultra4 udr]

whats the model engine

[mick bates]

i have this model now its in the same condition bought for £900 plus £30 for 2 4s batterys gensace 7600mah

[mick bates]

im not so keen on shell or engine if anyone wants too swap for a newer shell uk only

[GMballistic]

On 06/11/2021 at 12:08, mick bates said:

im not so keen on shell or engine if anyone wants too swap for a newer shell uk only

 

Think you got a bargain for all the money it would cost for the Vitavon upgrades. 

Try making a wanted add here: https://www.msuk-forum.co.uk/forums/forum/8-wanted/ 
Also welcome aboard. 

[H1q]

On 26/11/2020 at 23:51, YetiScore83 said:

Yes, sorry all I got distracted and then sort of lost interest in it. Its virtually done, just been stuck on the final 1% for the last few weeks, need to find thr motivation to get it done. 

 

Since the last update, the Hot Racing shock caps and toes, Traxxas TiNI shafts and Blue anodized bodies arrived. So build up the shocks with firmer Green and Blue springs, I need to reevaluate that though as it looks to be a little too firm now in the front. 

 

I Also swap out the front CVD for rhe new Hardened steel versions from Vitavon, as well as being a tougher material they are thicker especially in the dogbone necks, so should be super strong! 

 

The 1650kv motor is in and new gearing 55/31, I Alos change the Rearopen diff cup to the aluminium one. All fired up and running nice and smooth.. Result. 

 

Then started to tackle the minefield of wiring in this thing. It has the standard traxxas led kit.. But that is not compatible with the Hw max 6 Esc. So I have installed an old broken Vxl6s esc as a power source for the lights.. Amazingly is works. 

 

Functional rear fan cluster wired up too. 

 

Then I sent the body off for paint.. This build was a tribute to a trophy truck "Big Oly" not a scale replica just a tribute, but I'm pleased how thr body came out. 

 

The 1%.left to finish... Wire up and mount the front Halo lights and rear tail light, install the interior and then a full shake down. 

 

A few photos for you..

Awesome build @YetiScore83!