Portal axles

[Jake67]

I need some advice from the experienced. I have a Wltoys 184021 and I am upgrading the stock plastic portal axles with all metal aftermarket portal axles. The question I have is do I have to mess around with changing any gears? TIA.

 

[Mrgoodwrench35]

That would depend on what you bought. Are they metal housings only or do they have the axles, reduction gears and all? What gears are you referring to? Pinion and spur? More info needed. Maybe links to what you purchased.

 

[Tunedfrog]

Some portals come with a different size spur gear. You can change the spur if you want to get the speed you want.
Are the original portals not good?

 

[Jake67]

That would depend on what you bought. Are they metal housings only or do they have the axles, reduction gears and all? What gears are you referring to? Pinion and spur? More info needed. Maybe links to what you purchased.

I bought a cheap one from AliExpress it is the Wltoys 184021 crawler. It has stock plastic portal axles on it, from what I can see it has metal interior axles. It has a 2 speed transmission also stock with brushed motor. I am have not much luck with specific information on it. What I am wondering is if I bought aftermarket all metal portal axles are there any gears anywhere that might fight each other and bind up? Or are the aftermarket parts a plug and play and don't have to mess with gearing.

 

[Mrgoodwrench35]

I'm familiar with the truck your are referencing. I'm more questioning what replacement axles your purchasing. Do they come as a front and rear complete set? If so, your good as far as the binding issue you referenced. They should be the same ratio as a pair. What I dont know is if they are the same ratio as what is on the truck. That difference may affect your overall speed and depending on what you want, you may have to change the pinion on the motor or the spur. But that will only affect your overall speed.

A link to what you are purchasing would be very beneficial.

Also, as @Tunedfrog mentioned, why are you replacing them?

 

[Jake67]

I'm familiar with the truck your are referencing. I'm more questioning what replacement axles your purchasing. Do they come as a front and rear complete set? If so, your good as far as the binding issue you referenced. They should be the same ratio as a pair. What I dont know is if they are the same ratio as what is on the truck. That difference may affect your overall speed and depending on what you want, you may have to change the pinion on the motor or the spur. But that will only affect your overall speed.

A link to what you are purchasing would be very beneficial.

Also, as @Tunedfrog mentioned, why are you replacing them?

I will see if I can find the link. Yes I was going to get both as a set. I am also thinking of going brushless. How would I figure out the ratio in the transmission?

 

[Jake67]

I'm familiar with the truck your are referencing. I'm more questioning what replacement axles your purchasing. Do they come as a front and rear complete set? If so, your good as far as the binding issue you referenced. They should be the same ratio as a pair. What I dont know is if they are the same ratio as what is on the truck. That difference may affect your overall speed and depending on what you want, you may have to change the pinion on the motor or the spur. But that will only affect your overall speed.

A link to what you are purchasing would be very beneficial.

Also, as @Tunedfrog mentioned, why are you replacing them?

https://a.co/d/eKr93Fh . This is from Amazon better discription. I bought it from AliExpress.

 

[Mrgoodwrench35]

I will see if I can find the link. Yes I was going to get both as a set. I am also thinking of going brushless. How would I figure out the ratio in the transmission?

Thats a bit of a complicated question nor is that important at this point as its not something you can change. Your main drive gears are whats adjustable via pinion or spur change. You'll have to determine that once you install the new axles.

 

[Jake67]

Thats a bit of a complicated question nor is that important at this point as its not something you can change. Your main drive gears are whats adjustable via pinion or spur change. You'll have to determine that once you install the new axles.

Any idea how I figure that out after I change axles?

 

[Mrgoodwrench35]

If the new axles are the same ratio as the factory ones, you won't have to do anything. If there is a ratio difference, then it will effect your top speed. That can be adjusted by increasing or decreasing your pinion gear size on the motor. Its kind of a trial and error type thing. I would wait till the axles are installed and see how it drives before id be concerned with any other changes.

 

[Jake67]

If the new axles are the same ratio as the factory ones, you won't have to do anything. If there is a ratio difference, then it will effect your top speed. That can be adjusted by increasing or decreasing your pinion gear size on the motor. Its kind of a trial and error type thing. I would wait till the axles are installed and see how it drives before id be concerned with any other changes.

I do have it and really like the little one it definitely is overlooked. That's why I am upgrading it. I guess the first thing is I will do is take apart the axles and see how much of it is metal gears. I'm going to assume that will give me an idea about the gears in the transmission.