scroll down to see what to upgrade if want the best preformance on your trx4m, scroll to the number 1 to see list. also please read everything to catch everything but if not please go to the list so find everything.

So, you came across a TRX4m article on makerworld? whatt? yes this is not a topic about Makerworld so ill add some models! So, if your planning to get one here's what you should know about it. You need to upgrade everything. other wise if you don't it will kind of fall apart. i switched every plastic part for aluminum or brass. when you get it, get a new drive shaft or at least put a shrink wrap on the O ring because if a rock pulls that, the entire thing comes right off. Yes if you upgrade everything it is a very very capable crawler. If you want a crawler, get some Injora tires! s5 compound will be pretty good because i have some and its stick's really well. you also will want brass on the front for more weight, i added RampCrab 5mm wider axles that comes with brass for the steering knuckles and steering arm. You also need new shocks too so yeah, i use the 59mm shocks from injora and their good and use 20 or less shock oil because i first used 60 weight oil and my truck was super stiff. Lastly for a crawler type TRX4m, you want crawl gears, i find the plastic ones good or you can print some on printable which i never tried but i guess it works but i would print them in nylon or a tough material. Not PLA CF tho. https://www.printables.com/model/524221-crawl-gears-for-trx4m

alright so if you want a Baja type TRX4m which i love and like for my TRX4m bronco. I would upgrade the tires again to injora, i also would recommend the speed or stock gears because i like the bounce on it so i would get upgraded shocks, i have the 59mm shocks from injora but any company works i guess but not cheap ones. i don't really trust Traxxas because its so expensive but i mean, its OK??? get a new drive shaft because it will fall apart because it dose suck so i use the Injora stainless steel drive shaft so yeah. what i recommend will be on the bottom of these words.

1. ESC and Receiver, Traxxas's 2 in 1 ESC will die if used different motor, i use Injora ESC because it is very silent.  
2. Tires, Injora tires stick well to anything because it is s5 compound so it will benefit the performance unlike traxxas stock tires.
3. Weight, you want loads of brass because it will be have a better performance. 
4. Beadlock wheels, Brass wheels are nice and weight a bit for the truck for a better performance. this upgrade will make the tires push the car instead of the tires slipping.
5. Servo, Stock servo won't die but it use's plastic grears so it is not recommended so i use ECO power 640T. (i had a injora servo but it died due to unknown reasons). i still do recommend the Injora Coreless servo, not Cordless, CORELESS servo.
6. Axle links, this plastic part probably won't break but i do recommend upgrading it anyways, brass ones will improve it.
7.  Replacing the entire axle housing. Injoras is pretty good like their portal axles but this upgrade is only necessary only if you don't want any binding. Little guy racing parts do sell good axles too.
8. Motor, there's 2 types of motors i only found out witch is a Brushed ( stock ) or Brushless motors, brushless motors will go slow or fast but it pushes power like nothing, brushed motors i guess are good like the Meus motor but i had one and it died for no entire reason and bought it about 4-5 months ago but i would not recommend that one.

9. 2 speed transmission (optional). This is good if you want to go fast or slow like me but that's too bad that i don't have it. I would recommend you the Meus 2 speed transmission because it uses metal or aluminum gears ( one of them ) but Traxxas 2 speed transmission is plastic so if it strips ( likely wont but sometimes will if something happens there are no replacements ).

   10. Bearing, to improve the performance instead of bushing for a smoother drive. 

    

    

That's all i guess, those are the necessary upgrades but if you found a missing part then please tell me and ill add it, thanks for reading ( if you did ) but yeah. Honestly i did this because i was bored because I have nothing else to do so Byeeeeeee!