RCCrawler Forums

Jeckler · 01-26-2007, 10:03 AM

Ok, so the TXT-1's diff's are 2:1.
Maxx diffs are 2.85:1.

What I am planning is a 1/6th scale Gladiator build, and use a TXT axle in the rear, and a Maxx axle on the front, with the Maxx tranny. So, I need to somehow match the diff ratios.
I doubt anything exists, at least for the TXT, but are there custom R/P sets for the Maxx? Or the TXT?

Anyone have another idea? Custom transfer case?

Thorsteenster · 01-26-2007, 10:09 AM

could you rig up a .85:1 for the rear output? or maybe an inline diff somewhere to make up for the different axle speeds, probably wear out rather quickly and need to be changed frequently though. for a .85:1 gearbox, maybe a couple of 5mm pinions from rc4wd.

Jeckler · 01-26-2007, 10:18 AM

I hope I did the math right.

I'd either have to have a 0.7:1 case on the front end to match the rear, or a 1.42:1 case on the rear to match the front. They won't be exact, but I'm not planning on driving on pavement or anything. A two gear would work fine, at least up front, as I can just flip the Maxx diff over. The back would probably also work, but if I ran a timed moter, it'd have to be adjustable.
I could do the 5mm pinion idea, but I'm not sure I could make good enough mounts (tolerance).

The other thing I was thinking of was hacking up a TXT center section for the front instead of using the MAxx diff, but then I'd have to figure out how to adapt drive shafts to the outputs.

Thorsteenster · 01-26-2007, 10:32 AM

call me crazy, but what about hacking up the txt center section like you said and using the txt shafts but use a-arms to give it an indie look? a faked IFS.

Jeckler · 01-26-2007, 10:55 AM

I want the full indie experience.
Actually what I could do, since the TXT axle shafts are 5mm anyway, is just cut them off after they exit the diff, and put Maxx Yokes on. Still not sure if that's how I want to do it though. Plus it might be too wide for the carrier. That and I'd be destroying perfectly good parts.

Yea, I'll try the gearbox idea first.

Reflection · 01-26-2007, 11:01 AM

If it helps any,Twin Force ratio(factory) is 3.3. It's a hair closer. Theres also a 4.3 ratio available for the Twin diffs.

Just tossin out ideas.

Thorsteenster · 01-26-2007, 11:31 AM

i got some left over txt shafts after going TTR cvd's. i'd say that would look more scaleish with the txt pumpkin as well as matching the rear, give it a go. i'll give you my txt shafts just to see it.

Gula · 01-26-2007, 12:02 PM

Try this: HPI MT2 IFS, and wheely king rear axle Both use the same gears so they have the same ratio

Jeckler · 01-26-2007, 12:33 PM

Thor, lemme think about it. I'd still be hacking up a good axle case.

Gula, that sounds like it might be an idea. I don't know how wide a WK is though. Plus more $$$.

The inline gear reduction is sounding better and better.

Thorsteenster · 01-26-2007, 01:36 PM

keep an eye out, maybe some one has a beat txt case with a good center section, broke an ear off or somthing.

chino63 · 01-26-2007, 02:45 PM

just ditch the txt axle and fab up a solid axle out of a maxx center section. maybe a bit more work but same ratios. i dont think it would be too hard to do, depends on your skills. if your skills are minimal this would be a good project to increase your build skills on.

you may surprise yourself!

ON THE FARM · 01-27-2007, 03:11 PM

This is a nother idea. make a 2 pinion reducer to make up for the finals.

Reflection · 01-27-2007, 04:16 PM

Quote:

Originally Posted by ON THE FARM

This is a nother idea. make a 2 pinion reducer to make up for the finals.

Thats pretty slick right there.

Thorsteenster · 01-27-2007, 04:24 PM

thats what i meant in post #2

ON THE FARM · 01-27-2007, 04:25 PM

this is some thing i am trying to battle torq twist. so the drive shafts are counter rotating.
IT WORKS SWEET!!!!!!!!

ON THE FARM · 01-27-2007, 04:27 PM

Quote:

Originally Posted by thorsteenster

could you rig up a .85:1 for the rear output? or maybe an inline diff somewhere to make up for the different axle speeds, probably wear out rather quickly and need to be changed frequently though. for a .85:1 gearbox, maybe a couple of 5mm pinions from rc4wd.

i knew what you ment thats why i would help with a pic.

Thorsteenster · 01-27-2007, 04:42 PM

cool, thinking it and seeing it, it looks way better than i was thinking! nice work.
so you dont get torque twist with it? it would be easy to do a 1:1 box on the front or back just to counter it.
but i guess you couldnt do it with all axles as then it would run opposite the axle at the other end.

01-26-2007, 10:03 AM	#1
Jeckler Rock Crawler Join Date: Jan 2004 Location: Round Rock, TX Posts: 597	Changing diff gear ratio, Txt-1 or Maxx Ok, so the TXT-1's diff's are 2:1. Maxx diffs are 2.85:1. What I am planning is a 1/6th scale Gladiator build, and use a TXT axle in the rear, and a Maxx axle on the front, with the Maxx tranny. So, I need to somehow match the diff ratios. I doubt anything exists, at least for the TXT, but are there custom R/P sets for the Maxx? Or the TXT? Anyone have another idea? Custom transfer case?

01-26-2007, 10:09 AM	#2
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	could you rig up a .85:1 for the rear output? or maybe an inline diff somewhere to make up for the different axle speeds, probably wear out rather quickly and need to be changed frequently though. for a .85:1 gearbox, maybe a couple of 5mm pinions from rc4wd.

01-26-2007, 10:18 AM	#3
Jeckler Rock Crawler Join Date: Jan 2004 Location: Round Rock, TX Posts: 597	I hope I did the math right. I'd either have to have a 0.7:1 case on the front end to match the rear, or a 1.42:1 case on the rear to match the front. They won't be exact, but I'm not planning on driving on pavement or anything. A two gear would work fine, at least up front, as I can just flip the Maxx diff over. The back would probably also work, but if I ran a timed moter, it'd have to be adjustable. I could do the 5mm pinion idea, but I'm not sure I could make good enough mounts (tolerance). The other thing I was thinking of was hacking up a TXT center section for the front instead of using the MAxx diff, but then I'd have to figure out how to adapt drive shafts to the outputs.

01-26-2007, 10:32 AM	#4
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	call me crazy, but what about hacking up the txt center section like you said and using the txt shafts but use a-arms to give it an indie look? a faked IFS.

01-26-2007, 10:55 AM	#5
Jeckler Rock Crawler Join Date: Jan 2004 Location: Round Rock, TX Posts: 597	I want the full indie experience. Actually what I could do, since the TXT axle shafts are 5mm anyway, is just cut them off after they exit the diff, and put Maxx Yokes on. Still not sure if that's how I want to do it though. Plus it might be too wide for the carrier. That and I'd be destroying perfectly good parts. Yea, I'll try the gearbox idea first.

01-26-2007, 11:01 AM	#6
Reflection TEAM MODERATOR Join Date: May 2004 Location: Tennessee Posts: 10,855	If it helps any,Twin Force ratio(factory) is 3.3. It's a hair closer. Theres also a 4.3 ratio available for the Twin diffs. Just tossin out ideas.

01-26-2007, 11:31 AM	#7
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	i got some left over txt shafts after going TTR cvd's. i'd say that would look more scaleish with the txt pumpkin as well as matching the rear, give it a go. i'll give you my txt shafts just to see it.

01-26-2007, 12:02 PM	#8
Gula I wanna be Dave Join Date: Jun 2006 Location: Here Posts: 2,324	Try this: HPI MT2 IFS, and wheely king rear axle Both use the same gears so they have the same ratio

01-26-2007, 12:33 PM	#9
Jeckler Rock Crawler Join Date: Jan 2004 Location: Round Rock, TX Posts: 597	Thor, lemme think about it. I'd still be hacking up a good axle case. Gula, that sounds like it might be an idea. I don't know how wide a WK is though. Plus more $$$. The inline gear reduction is sounding better and better.

01-26-2007, 01:36 PM	#10
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	keep an eye out, maybe some one has a beat txt case with a good center section, broke an ear off or somthing.

01-26-2007, 02:45 PM	#11
chino63 Oppan Gangnam Style Join Date: Jun 2005 Location: Shingle Springs Posts: 5,164	just ditch the txt axle and fab up a solid axle out of a maxx center section. maybe a bit more work but same ratios. i dont think it would be too hard to do, depends on your skills. if your skills are minimal this would be a good project to increase your build skills on. you may surprise yourself!

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01-27-2007, 03:11 PM	#12
ON THE FARM Quarry Creeper Join Date: Aug 2006 Location: NORTH TEXAS Posts: 202	This is a nother idea. make a 2 pinion reducer to make up for the finals.

01-27-2007, 04:24 PM	#14
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	thats what i meant in post #2

01-27-2007, 04:25 PM	#15
ON THE FARM Quarry Creeper Join Date: Aug 2006 Location: NORTH TEXAS Posts: 202	this is some thing i am trying to battle torq twist. so the drive shafts are counter rotating. IT WORKS SWEET!!!!!!!!

01-27-2007, 04:42 PM	#17
Thorsteenster I wanna be Dave Join Date: May 2006 Location: Arlington, VA Posts: 3,377	cool, thinking it and seeing it, it looks way better than i was thinking! nice work. so you dont get torque twist with it? it would be easy to do a 1:1 box on the front or back just to counter it. but i guess you couldnt do it with all axles as then it would run opposite the axle at the other end.

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