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4x4XJ · 12-13-2005, 05:20 PM

Found this 2 spead gearbox on ebay and was wondering if it would useful for those who want a low crawling gearing and still be able to have some wheel spin.

2 speed gearbox auction

The gearbox changes gears once the motor reaches a certain rpm. The high gear is 1:1 and low is 1:1.6

Ace · 12-13-2005, 05:35 PM

Looked pretty cool until I saw this:

*Reverse will be disabled when gear box is applied

That rules it out for sure!

Cole82 · 12-13-2005, 05:55 PM

Doesn't that mean there wouldn't be any brakes either? I think it's a centrifical(SP) design.

4x4XJ · 12-13-2005, 09:31 PM

Quote:

Originally Posted by Ace

Looked pretty cool until I saw this:

*Reverse will be disabled when gear box is applied

That rules it out for sure!

Didnt read that, oh well. would have been cool though.

JohnRobHolmes · 12-13-2005, 10:39 PM

I like goodsgood's article.

" It provides racers with more steering control over sharp corner as well as the necessary speed for straight tracks."

Don't they mean "disables breaks to put all traction into steering"? Thats still a hella cool little gearbox. As long as the vehicle could oversteer you could stop.

4RnrRick · 12-14-2005, 09:20 AM

To me it looks like it would still work in reverse - it just wouldn't shift gears in reverse.... Is that right or wrong????

This looks great for a basher to me. gear it low for crawling and then you get some more top speed for bashing.

4RnrRick · 12-14-2005, 09:24 AM

Oh never mind..... I see how it works now. there is a one way bearing on the secondary shaft, so yes reverse is totaly disabled.....

JasonInAugusta · 12-14-2005, 11:57 AM

They're basically applying the principles behind a Nitro tranny to this.

The only difference is that they're using a 3 shoe nitro clutch/clutchbell to engage 2nd gear instead of the finger type clutches found in most 2-speed trannies.

As mentioned earlier, there's a one-way bearing to deal with, as well as actually getting 2nd to engage...takes centrifugal force...which means high RPMs.

If reverse is disabled, so is the braking ability. You'd have to have an extra servo on a "Y" harness with the ESC to apply brakes somewhere in the driveline.

Anyone else notice how 3 of those gears look like they came from the E-Maxx tranny? :neutral:

joostin420 · 12-14-2005, 01:55 PM

here you go: http://monster.traxxas.com/showthrea...hreadid=122554

and here you go again: http://monster.traxxas.com/showthrea...highlight=nova

justin

Mad Scientist · 12-14-2005, 05:51 PM

Yeah, I saw those a little while ago an eBay. I nearly ordered a couple, but then I saw that reverse was disabled.

12-13-2005, 05:20 PM	#1
4x4XJ Rock Stacker Join Date: Sep 2004 Location: Auburn University Posts: 75	would this 2 speed gearbox be useful to us? Found this 2 spead gearbox on ebay and was wondering if it would useful for those who want a low crawling gearing and still be able to have some wheel spin. 2 speed gearbox auction The gearbox changes gears once the motor reaches a certain rpm. The high gear is 1:1 and low is 1:1.6

12-14-2005, 11:57 AM	#8
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	They're basically applying the principles behind a Nitro tranny to this. The only difference is that they're using a 3 shoe nitro clutch/clutchbell to engage 2nd gear instead of the finger type clutches found in most 2-speed trannies. As mentioned earlier, there's a one-way bearing to deal with, as well as actually getting 2nd to engage...takes centrifugal force...which means high RPMs. If reverse is disabled, so is the braking ability. You'd have to have an extra servo on a "Y" harness with the ESC to apply brakes somewhere in the driveline. Anyone else notice how 3 of those gears look like they came from the E-Maxx tranny? :neutral: Last edited by JasonInAugusta; 12-14-2005 at 11:59 AM.

12-13-2005, 05:35 PM	#2
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	Looked pretty cool until I saw this: *Reverse will be disabled when gear box is applied That rules it out for sure!

12-13-2005, 05:55 PM	#3
Cole82 I wanna be Dave Join Date: Jul 2005 Location: Cedar Rapids Posts: 2,028	Doesn't that mean there wouldn't be any brakes either? I think it's a centrifical(SP) design.

12-13-2005, 10:39 PM	#5
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I like goodsgood's article. " It provides racers with more steering control over sharp corner as well as the necessary speed for straight tracks." Don't they mean "disables breaks to put all traction into steering"? Thats still a hella cool little gearbox. As long as the vehicle could oversteer you could stop.

12-14-2005, 09:20 AM	#6
4RnrRick Rock Crawler Join Date: Dec 2004 Location: www.ORCRC.com Posts: 693	To me it looks like it would still work in reverse - it just wouldn't shift gears in reverse.... Is that right or wrong???? This looks great for a basher to me. gear it low for crawling and then you get some more top speed for bashing.

12-14-2005, 09:24 AM	#7
4RnrRick Rock Crawler Join Date: Dec 2004 Location: www.ORCRC.com Posts: 693	Oh never mind..... I see how it works now. there is a one way bearing on the secondary shaft, so yes reverse is totaly disabled.....

12-14-2005, 01:55 PM	#9
joostin420 Newbie Join Date: Jan 2005 Posts: 12	here you go: http://monster.traxxas.com/showthrea...hreadid=122554 and here you go again: http://monster.traxxas.com/showthrea...highlight=nova justin

12-14-2005, 05:51 PM	#10
Mad Scientist RCC Addict Join Date: Mar 2005 Location: Saginaw Posts: 1,721	Yeah, I saw those a little while ago an eBay. I nearly ordered a couple, but then I saw that reverse was disabled.

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