RCCrawler Forums

chaos18 · 01-30-2005, 02:04 PM

dose anyone know the ratio of a maxx diff.. i think its 3:1???????and whats a good crawl ratio for a mxx crawler??
thanks Chaos

TwistedCreations · 01-30-2005, 05:16 PM

i think its either 2.7 or 2.8 cant remember for sure

just did a "SEARCH"

and found the tranny is 2.7 and the diffs are 2.8

i think mine is like 65:1 ratio, but depends on what motor you have.. my lathe motor on 1 battery makes it alot slower than that.. my top speed is like 3-4 mph

WRMorrison · 01-30-2005, 07:13 PM

Twisted is right,

diff ratio: 2.84:1
1st gear: 2.76:1
2nd gear (in case you're wondering) 1.72:1

I'm using a lathe motor, GD-600 (2.5:1), 76T spur and 9Tpinion (robinson racing).

Hope this helps...

chaos18 · 01-30-2005, 08:12 PM

yea that dose thanks except im going a little diffrent on the trans. im using a sportmaxx tranny i think the ratio is 2:1 or something like that i put on a stock pede spur and im using a 13t pinion.
( a gear ratio in the trans is how many times the spur goes around for the driveshaft to turn once right???)if so thats my ratio..
thanks again for you help..
Chaos

TwistedCreations · 01-30-2005, 08:42 PM

to get your ratio

divide the pinion into the spur

then multiply that by the trans

then multiply that by the diffs

then thats your ratio ;)

alot easier

chaos18 · 01-30-2005, 10:56 PM

if that works my ratio is 36.45.....(but i dont know what that means lol
Chaos

TwistedCreations · 01-31-2005, 06:38 AM

that means you have a 36:1 crawl ratio,which is still kinda fast

but if you use a lathe motor, that also help slow it down.

also, you said you were using a pede spur gear? isnt that a 48 pitch gear? why use that? a 32 p is stronger :?

chaos18 · 01-31-2005, 07:21 AM

the only pinions i have for that are like 19 t
Chaos

TwistedCreations · 01-31-2005, 09:23 AM

well if your set on using 48p gears,,,go get a 12t pinion and a 96( i think thats it) spur gear..im running those on my sons pede tranny..but since your running maxx stuff, go get a 72spur gear for a maxx( 32pitch) and a 9t pinion ;)

chaos18 · 01-31-2005, 09:44 AM

i just finished the lower links and i put it togeather for a test and it dosent go very fast it should be a good crawl ratio..
Chaos

01-30-2005, 02:04 PM	#1
chaos18 Pebble Pounder Join Date: Oct 2004 Location: ny Posts: 107	maxx ratios dose anyone know the ratio of a maxx diff.. i think its 3:1???????and whats a good crawl ratio for a mxx crawler?? thanks Chaos

01-30-2005, 05:16 PM	#2
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	i think its either 2.7 or 2.8 cant remember for sure just did a "SEARCH" and found the tranny is 2.7 and the diffs are 2.8 i think mine is like 65:1 ratio, but depends on what motor you have.. my lathe motor on 1 battery makes it alot slower than that.. my top speed is like 3-4 mph Last edited by TwistedCreations; 01-30-2005 at 05:23 PM.

01-30-2005, 07:13 PM	#3
WRMorrison Rock Crawler Join Date: Dec 2004 Location: Land of the Free, because of the Brave Posts: 891	Twisted is right, diff ratio: 2.84:1 1st gear: 2.76:1 2nd gear (in case you're wondering) 1.72:1 I'm using a lathe motor, GD-600 (2.5:1), 76T spur and 9Tpinion (robinson racing). Hope this helps...

01-30-2005, 08:12 PM	#4
chaos18 Pebble Pounder Join Date: Oct 2004 Location: ny Posts: 107	yea that dose thanks except im going a little diffrent on the trans. im using a sportmaxx tranny i think the ratio is 2:1 or something like that i put on a stock pede spur and im using a 13t pinion. ( a gear ratio in the trans is how many times the spur goes around for the driveshaft to turn once right???)if so thats my ratio.. thanks again for you help.. Chaos

01-30-2005, 08:42 PM	#5
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	to get your ratio divide the pinion into the spur then multiply that by the trans then multiply that by the diffs then thats your ratio ;) alot easier

01-30-2005, 10:56 PM	#6
chaos18 Pebble Pounder Join Date: Oct 2004 Location: ny Posts: 107	if that works my ratio is 36.45.....(but i dont know what that means lol Chaos

01-31-2005, 06:38 AM	#7
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	that means you have a 36:1 crawl ratio,which is still kinda fast but if you use a lathe motor, that also help slow it down. also, you said you were using a pede spur gear? isnt that a 48 pitch gear? why use that? a 32 p is stronger :?

01-31-2005, 07:21 AM	#8
chaos18 Pebble Pounder Join Date: Oct 2004 Location: ny Posts: 107	the only pinions i have for that are like 19 t Chaos

01-31-2005, 09:23 AM	#9
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	well if your set on using 48p gears,,,go get a 12t pinion and a 96( i think thats it) spur gear..im running those on my sons pede tranny..but since your running maxx stuff, go get a 72spur gear for a maxx( 32pitch) and a 9t pinion ;)

01-31-2005, 09:44 AM	#10
chaos18 Pebble Pounder Join Date: Oct 2004 Location: ny Posts: 107	i just finished the lower links and i put it togeather for a test and it dosent go very fast it should be a good crawl ratio.. Chaos

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