Transmission Question

[redspowerjams]

Im just getting into scale building after being out of RC's for a few years. For my first build I want to build a 2wd street truck and thinking about the Machined Ultimate Scale Yota 1.9 Axle from RC4WD and not sure about what trans to use or if I can use it straight to the axle with a drive shaft of course. lol.. Was thinking about the trail Finder 2 trans but without the transfer case in the mix will it spin to fast like a bat out of hell or to slow like snot running down the wall? my plan is not to race with it.. just take it out every now and then and just run it around.

Any help would be grate, or know of a good trans to use..

Other transmissions i was looking at is,
RC4WD Distuptor Planetary Transmission w/ Punisher Shaft

RC4WD R2 Black Transmission (Z-U0009 ) w/ Long Drive Shaft (5mm).

 

[sickcivic95]

It's all going to depend on gearing on the trans as well as the motor you have. If you went with a high turn motor it will have less speed and more torque and vice versa for more speed. Most axles can be connected directly from the trans without a diff or transfer case In between. These justice you more gearing options as well as availability of 4wd from a single output trans.

There is a lot of options available for both motors and gear sets for the trans do a bit of research and find a set that works for what your looking for.

--Dan

 

[RiceBurner]

Disruptor is what i would use, RC4WD also has 1 to 2, like gear reduction units but makes things faster, Also a traxxas stampede tranny will spin stuff fast and can be hooked directly to a drive shaft."thumbsup"

 

[redspowerjams]

I know motors and gearing and I will be going with a 27T single because that is what I have on hand. I was racing for many years.. I just never had any type of scale truck with a transfer case and don't know how the gearing is set up in them.. I guess what i should be asking is, which way does the transfer case work? Is the final drive leaving the transfer case going slower than the impute drive or is it making it faster because that is what I need to eliminate? how is the gearing set up in the transfer case so I know how to compensate? and on top of that I have no idea who is making the good trans and who is making the crap..

And from what Rice Burner is saying, the Disruptor would be my best bet..

Thanks..

 

[sickcivic95]

Its still all about the gearing, Some transfer cases are setup at 1:1 so there is no reduction at all. Others are 1.5/1 or 2.25/1 and also .75/1 gearing. So you can get both increased and reduction types. The easiest way to look at it is the first number is the input shaft and the second is the output. So a 1.5/1 the input turns 1.5 times to the outputs 1 turn, so its a small reduction. If the first is lower then its an increased speed on the output shaft.


You'd probably be better off just using a gear reduction unit mounted directly to the motor itself theres 4to1 or 2to1 if your planning on the r2 trans or tf2 trans, seeing as your not going to go with a lower turn motor, A 27 turn will be pretty fast for a scale based truck, so if you did a 2 to 1 reduction unit it would be more "like" a 35 turn (<-- this is just guesstimating) which is a better speed for these trucks as a scaler.

With the disruptor transmission,If you are just going out to bash and play in the yard you might like the speed available with just the motor itself, because those transmissions are basically just a hardcore gear reduction unit anyway.

--Dan

 

[redspowerjams]

don't take this the wrong way but you are making this more complicated than it is.

I don't know about the scale trucks, I do not have a scale truck, I need a transmission but don't have one. I know its all about gearing and you don't need to go over this with me.....

If truck "A" has a well made transmission and the transfer cases is a 1:1 then what transmission is that or what is the truck i can find it in?
If truck "B" has a well made transmission and the transfer cases is a 1:5 then what transmission is that or what is the truck i can find it in?
If truck "C" has a well made transmission and the transfer cases is a 5:1 then what transmission is that or what is the truck i can find it in?
If truck "D" has a Crap made transmission then it don't matter what it is... don't want it..

you know what.. never mind..

P.S. Thank you very much RiceBurner

 

[sickcivic95]

If you know all about gearing then how do you not know how a gear reduction works or a transfer case works? I've only answered your question about the trans you asked about and the transfer case you asked about? I'm not trying to confuse you just help you with your question.

--Dan

 

[redspowerjams]

my point was, I don't know anything about trucks that use a transfer case and trans with a 2 speed. I have no idea what way the gearing goes, (up or down). I did not know if the transfer case was a reduction or if they where 1:1. and if some of the transmissions where higher geared and others where very low. I only ran race trucks in the past but you can change the spur and pinion to make it do what ever you want it to do depending on the motor. in the race world a 27t single is a stock motor for the slow people and i never ran any more turns than that.. looks like on some scale truck you can only play with the pinion and some are not set up for options without adapters. I just don't want to get a trans that is geared very high and needs a reduction. if there is one that has a 1:1 transfer case then I can get an idea how fast or slow it my go.

I was trying to get info about the trucks transmissions and transfer cases. not how gearing works..

 

[sickcivic95]

That stuff wasnt just gearing info, those Are all rc4wd transfer cases and one was the disruptor transmission you linked in your first post. There are stil a ton of transmissions available with spur and pinion if that's easier for you to work with check out a traxxas stampede or axial trans.

The ones you pointed out earlier are all designed with specific gear ratios and can only have pinion changed. But can still be adapted to work great. Most of those are designed for high turn motors and have low output ratios to have a walking paced top speed

The disruptor transmission is literally a giant gear reduction unit designed to take a lot of abuse. It's a 16 to 1 reduction. So you wouldn't need anything else just motor and driveshaft to your axle.

The transfer cases can be used with any transmission so you can go whatever route you want.

--Dan

 

[benoj]

If I were to build a 2wd street truck I would simply go with the desired axle and either a Traxxas stampede/rustler trans that's been locked or an axial trans or for 2sp a tf2 trans. No transfer case is needed since its 2wd


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