07-16-2012, 12:43 PM | #1 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| transfer case question
i'm pulling parts together to build a scx10 axled 6x6 rig. i'm going to run a standard scx10 tranny into a rc4wd disruptor transfer case. the question is should i get the transfer case that gears up (2.18:1) or down (.75:1)? if i wanted to maintain a final drive ratio similar to the stock scx10 which is the best option? i know i can drop in different spur/pinion gears on the scx10 tranny to adjust. is one method better from a strain on the system point of view? i was leaning toward gearing up (2:18:1).
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07-16-2012, 02:46 PM | #2 |
Rock Crawler Join Date: Dec 2009 Location: Chicago
Posts: 539
| Re: transfer case question
Get a GCM one that is a 1:1.
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07-16-2012, 03:02 PM | #3 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| Re: transfer case question |
07-16-2012, 03:42 PM | #4 |
I wanna be Dave Join Date: Oct 2010 Location: Caldwell ID.
Posts: 4,327
| Re: transfer case question
Just fyi 2.18\1 is lower gearing, input turns 2.18 times per 1 turn of output. The other .75 \1 input turns 3/4 of a turn to 1 turn of the output. The easiest would be to get the over driven one .75/1 and gear down your trans.
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07-16-2012, 04:13 PM | #5 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| Re: transfer case question glad you pointed out that i'm bass-ackwards! so the .75/1 is what i was thinking would be the best fit for me. i have heard that gcm may be coming out with a 2-speed transfer case. need to look into that.
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07-16-2012, 05:01 PM | #6 |
RCC Addict Join Date: Mar 2010 Location: Yelm
Posts: 1,643
| Re: transfer case question
I ran the 2.18:1 disruptor for a while. I liked it. Very bulletproof, but it lacks the wheelspeed I desire. Too low geared for my liking. I would also suggest something in the 1:1 ratio area and play with the transmission gearing to fine tune it. |
07-16-2012, 05:37 PM | #7 |
RCC Addict Join Date: Feb 2011 Location: York
Posts: 1,125
| Re: transfer case question
I have a Cole's Crawlers 1:1 tcase and an axial tranny. Decent wheelspeed with a 27t on 2s but not enough crawl. Already running a 14t pinion so I'm going to a 35turn and a 3s batt. I think the 1:1 tcase is the way to go. Gearing it down (up numerically) would make it harder to find that sweetspot as it would be a more narrow range.
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07-17-2012, 04:24 AM | #8 | |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| Re: transfer case question Quote:
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07-17-2012, 04:50 AM | #9 |
RCC Addict Join Date: Jan 2008 Location: Lake Michigan
Posts: 1,898
| Re: transfer case question
They made them on the side, starting in 2008. Not sure he is still making them. Cold Case CRT 1.5 Scale Transfer Case Can be purchased from Team Raceway Pre-Order price $50 + shipping Price after produced $60 + shipping paypal - racewayhobby@gmail.com Cold Case CRT 1.5 Scale Transfer Case - Scale 4x4 R/C Forums |
07-17-2012, 05:09 AM | #10 |
RCC Addict Join Date: Jan 2008 Location: Lake Michigan
Posts: 1,898
| Re: transfer case question
Couple of interesting ones tucked in here: rc crawler veicoli radiocomandati per fuoristrada estremo |
07-17-2012, 05:19 PM | #11 |
I wanna be Dave Join Date: May 2006 Location: akron
Posts: 4,054
| Re: transfer case question
On a multi axle rig a little more reduction wont hurt.. Odds are you will be pulling things around and doing slow crawling more then jumping it..
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07-17-2012, 05:38 PM | #12 | |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| Re: transfer case question Quote:
i need to find the math on here. what spur/pinion combos would i need with each t-case to get back to the stock final ratio. | |
07-17-2012, 06:44 PM | #13 |
RCC Addict Join Date: Jan 2008 Location: Lake Michigan
Posts: 1,898
| Re: transfer case question
You can run some numbers here: R/C Calculations or R/C Calculations Use the "Additional gear ratio" for that of your transfer. |
07-18-2012, 05:01 PM | #14 | |
I wanna be Dave Join Date: May 2006 Location: akron
Posts: 4,054
| Re: transfer case question Quote:
I would pick lower gears and more motor every time.. to quote Holmes Volt up Gear down.. | |
07-18-2012, 06:18 PM | #15 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,598
| Re: transfer case question
I haven't plugged in the numbers yet but seems like I'm now leaning towards 2.18:1. I may be looking to pull a trailer so low speed with lots of torque will be key.
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07-19-2012, 12:47 AM | #16 |
Rock Crawler Join Date: Jan 2007 Location: UK
Posts: 829
| Re: transfer case question
RC4WD now sell the Hammer tcase separately: http://store.rc4wd.com/Hammer-Transf...71_p_2214.html |
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