How far can two ratios be?

[ScaleLifeNewbie]

Alright, I’m bringing this thread back alive due to going forward with this build idea.

My goal is to use a K44 rear axle(2:76:1) with an Element IFS (3:75:1)

In my mind, I could connect a regular 3 gear tranny to a overdriven tcase which then drives the axles and even out the overdriven rear K44, right? Or am I missing something?

Yes, I know I could put leafs on an element or AR44 axle but I like the scale looks of the K44, plus the simplicity of mounting leafs and whatnot.


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[DRED805]

The rear axle is ~30% faster than the front. A transmission with 30% OD (TGH) would cancel that out. Or you could use a VFD twin and lock it in high OD (46%) to get the front moving faster than the rear.

[ScaleLifeNewbie]

Originally Posted by DRED805

The rear axle is ~30% faster than the front. A transmission with 30% OD (TGH) would cancel that out. Or you could use a VFD twin and lock it in high OD (46%) to get the front moving faster than the rear.

Yeah I hear ya on that. I just can’t get over using a 2.low in a scale rig not built for performance lol. Seems odd to me. I am considering the VFD Twin though.

My main reasoning for the 3 gear/t case idea is I already have a transmission around and the t case is right at $80.


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[DRED805]

What t-case? Creeper? How are you gonna fit that and a 3 gear? That’d also be a ton of extra gearing.

[twade984]

Originally Posted by ScaleLifeNewbie

Yeah I hear ya on that. I just can’t get over using a 2.low in a scale rig not built for performance lol. Seems odd to me. I am considering the VFD Twin though.

My main reasoning for the 3 gear/t case idea is I already have a transmission around and the t case is right at $80.


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Amain Addict

I’m with you there. The twin locked in high o/d seems like the perfect option. Even giving you a little bit of o/d to the front.

Just sent you a pm.


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[ScaleLifeNewbie]

Originally Posted by DRED805

What t-case? Creeper? How are you gonna fit that and a 3 gear? That’d also be a ton of extra gearing.

I planned on using the RC4WD TF2 Overdriven case as it’s pretty compact and I can go from 27% OD to 67%. I figured I’d put it in the 33% or 42% and call it good. I’m pretty sure I’ll be using a TRX6 chassis rail so space is not an issue.

Genuine question time:
What’s the problem with having extra gearing? Just more gears to break/maintain?

Sorry if that’s a stupid question lol. I just don’t see the problem with having a tranny & a T case. The TF2 accomplishes it no problem.


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[DRED805]

Originally Posted by ScaleLifeNewbie

I planned on using the RC4WD TF2 Overdriven case as it’s pretty compact and I can go from 27% OD to 67%. I figured I’d put it in the 33% or 42% and call it good. I’m pretty sure I’ll be using a TRX6 chassis rail so space is not an issue.

Genuine question time:
What’s the problem with having extra gearing? Just more gears to break/maintain?

Sorry if that’s a stupid question lol. I just don’t see the problem with having a tranny & a T case. The TF2 accomplishes it no problem.

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Amain Addict

Nothing wrong with tons of gearing... I have a couple low ones, and they're just louder. It's easy to make up for gearing by adding voltage, higher KV motor, and/or choosing a different spur/pinion combo. I don't know how much gear reduction is in that rc4wd tcase, but it should be doable.

[ScaleLifeNewbie]

Originally Posted by DRED805

Nothing wrong with tons of gearing... I have a couple low ones, and they're just louder. It's easy to make up for gearing by adding voltage, higher KV motor, and/or choosing a different spur/pinion combo. I don't know how much gear reduction is in that rc4wd tcase, but it should be doable.

Thanks for the info man. Now I’ve gotta decide I what route I wanna go.


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[ferp420]

3 bad things with exsesive gearing
lack of wheel speed easily fixed
the goobs of torque will make it so much easyer to break parts not really a big deal though
andthe biggest problem of all normal gearing seems lame after drive a rig properly set up rig with extreme low gears
a 2 speed helps with #1
#2 well its just a fact of life more torque =more broken parts
#3 you just have to regear all your rigs simple right lol
in my opinion the gear noise is a plus depending on the noise there making

[ScaleLifeNewbie]

Originally Posted by ferp420

3 bad things with exsesive gearing
lack of wheel speed easily fixed
the goobs of torque will make it so much easyer to break parts not really a big deal though
andthe biggest problem of all normal gearing seems lame after drive a rig properly set up rig with extreme low gears
a 2 speed helps with #1
#2 well its just a fact of life more torque =more broken parts
#3 you just have to regear all your rigs simple right lol
in my opinion the gear noise is a plus depending on the noise there making

Yeah definitely don’t want extremely low gears. I think I’ve decided to just go ahead with the VFD Twin for simplicity sake instead of trying to put a tcase with a 3 gear and mess with gearing.




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[DRED805]

Originally Posted by ScaleLifeNewbie

Yeah definitely don’t want extremely low gears. I think I’ve decided to just go ahead with the VFD Twin for simplicity sake instead of trying to put a tcase with a 3 gear and mess with gearing.




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Amain Addict

Don't buy one from a vendor... twins from part-outs are as low as $120 shipped on Facebook right now. If you want one for that price, I'll buy a phoenix and send you the trans. I've been on the fence about getting another one, but I already have 3 twins... haha.

[ScaleLifeNewbie]

Originally Posted by DRED805

https://store.rc4wd.com/Leaf-Spring-...ng_p_7775.html

Never mind... they're out of stock.

Does anybody know if these will fit an element axle? I have one laying around and it would be good to use that instead of buying an ar44…

[durok]

Not sure if the RC4WD product fits Element axles, but in case anyone is looking for leaf mounts in general, JEC Racing occasionally has some in stock - they have at least 3 different models:

https://jecracing.com/collections/1-10-products

[ScaleLifeNewbie]

If anybody was wondering, JEC racings AR44 leaf mounts fit element axles with no problems. All holes line up and even factory screws are long enough. I don’t plan on running them on these axles but they don’t work for anyone curious.



Now the RC4WD ones won’t work, but they don’t on AR44s either because what is linked above is just the adapter pieces for the SCX10ii Leaf conversion kit which is now discontinued. So it looks like JEC is the only option other than something from Shapeways or custom built.