Your Strength score increases by 1

The juggernaut's Body of War plating provides it with an Armor Class of 14 + your Proficiency Bonus or Constitution Modifier. This plating occupies the same space as armor would and is treated as Heavy armor for all intents and purposes. Because of this plating a juggernaut always has disadvantages when rolling Dexterity (Stealth) checks. A warforged juggernaut is always proficient with this plating. Because of this trait, the body of a warforged juggernaut can be enchanted like armor.

A juggernaut has the advantage on checks and saves to resist effects that would physically move it or knock it prone but it uses twice the amount of movement required to stand from prone.

Due to its structural integrity, a Juggernaut can wade tirelessly into battle that would fell even the most stalwart footman. At the start of each of your turns, you gain temporary hit points equal to your proficiency bonus if you have at least 1 hit point remaining. 

Your Dexterity score increases by 1. 

The warforged scout adds a +1 bonus to its AC. Because of this trait, the body of a warforged scout can be enchanted like armor.

 Your walking speed is 35 feet. 

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray. 

A scout may elect to be size small instead of medium. This choice is made at creation and may not be changed after. A small scout can use weapons with the heavy property that it is proficient with without penalty.

 Your Intelligence score increases by 1.

A tactician's Body of War plating provides it with an Armor Class of 13 + your Dexterity modifier or 1/2 your proficiency bonus (rounded up), whichever is higher. This plating occupies the same space as armor would and counts as light armor. A warforged tactician is always proficient with this plating. Because of this trait, the body of a warforged tactician can be enchanted like armor. 

A tactician starts with the guidance cantrip which it can cast at will separate from class based spellcasting (so you can cast it without needing to e a spellcaster)

Battlefield Engineer. A tactician has proficiency with two set of artisans tools 

A warforged does not recover hit points automatically after finishing a long rest. A warforged starts with a 'warforged repair kit' that it can use to recover all its hit points. This kit is a set of artisans tools that are specifically designed to repair warforged. A warforged can use this kit to heal themselves during a short or long rest allowing them to spend hit dice to heal, but it must use a repair kit to do so. The following tools may be used instead of a full warforged repair kit at 1/2 of the normal hit point recovery (rounded up): jeweler's tools, mason's tools, smith's tools, or tinker's tools. All warforged are proficient with a warforged repair kit and start with one at character creation. This repair process is a form of 'light work' and may be performed while resting. 

You can speak, read, and write Common and one additional language (usually reflecting the language of its creators or a common enemy). 

Any score of your choice increases by 1. 

You gain access to the Powerful Build trait

You gain proficiency with Land, Sea, and (if available in your setting) Air vehicles 

A Transport's Body of War plating provides it with an Armor Class of 13 + your Constitution modifier or 1/2 your proficiency bonus (rounded up), whichever is higher. This plating occupies the same space as armor would and counts as Light armor. A warforged tactician is always proficient with this plating. Because of this trait, the body of a warforged Transport can be enchanted like a normal set of armor. Additionally, the armor's fluid nature (given what you were designed for) gives the user a choice of resistance to either bludgeoning, piercing, or slashing damage, you can choose one whenever you finish a short or long rest.

Once you reach 3rd level You can use your action to shift into a unique vehicular form (The appearance you decide) with the following benefits.

Speed. Your speed changes to the speed of a horse which you can maintain for a number of hours equal to twice your con modifier+your proficiency bonus up to a day

You gain a +5 to your AC as well as benefits/effects of whatever armor you were wearing/using before you transformed

Your size increases to Huge and gain a +5 bonus to strength

If reduced to zero HP you revert to normal and can chose to release all contents inside you or hold it in a extra dimensional storage space 

Trample. As an action you can move forward up to ½ your movement and trample any creature more than one size category smaller than you in your way. Creatures that fail a dexterity save equal to your proficiency bonus + ½ your level (rounded down) take 2d12 bludgeoning damage and are knocked prone.

At the end of a long rest you can chose weather its a land sea or (if in setting) air vehicle you have observed the functioning of and it can't be larger than your vehicle’s size (TLDR, to become something like a boat or airship you need to observe them first)

Most Class features don't work in this form and its mostly intended to be used for transportation and storage purposes. Think of it like a druid’s wild shape feature, you can hold concentration and somewhat attack, but cant do things like cast spells.

You have an inter-dimensional compartment that you can use to store people and supplies for journeys. you can hold a number of medium or smaller creatures equal to double your proficiency bonus + your level and still have room for supplies. While inside the space is decorated however you chose but has some kind of storage space and rest area for passengers.

You can chose to store or release objects stored in this space while in vehicle form or humanoid form and anything in there is effectively locked in there until you release out. You have full awareness of what's happening inside the dimension and can communicate with anyone inside it and show them visuals of what you see.

While in Vehicle from you can project a solid image of yourself inside the compartment to interact with who/what's inside (just incase anything like combat happens) the solid image is identical to you statewise with the exception it cannot leave a 20ft radius of your vehicle form. If it does it will just harmlessly blink out of existence.