Pulling Forum - Gear Ratio difference between a rc and wc

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Gear Ratio difference between a rc and wc

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Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=107851
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Topic: Gear Ratio difference between a rc and wc

Posted By: autobody
Subject: Gear Ratio difference between a rc and wc
Date Posted: 20 Jun 2015 at 9:03pm

What is the gear ratio difference between a rc and a wc ring and pinion

Replies:

Posted By: Zaddison
Date Posted: 20 Jun 2015 at 9:19pm

WC 7-32 rc 5-33 4.4 6.6 I think but could be wrong.

Posted By: autobody
Date Posted: 20 Jun 2015 at 9:37pm

How much slower would a wc be with rc ring and pinionz

Posted By: Zaddison
Date Posted: 20 Jun 2015 at 10:30pm

Not sure. I'm sure some one on here could tell you. I've heard 10 to 25 percent but not sure what it really is. Just put a set of high crop gears in mine.

Posted By: DrAllis
Date Posted: 21 Jun 2015 at 7:25am

7 x 32 is 4.6 to 1 ratio..............5 x 33 is 6.6 to 1 ratio(if those are the correct tooth counts). This is a 30% speed change (not 10 or 15 or 25%).

Posted By: Zaddison
Date Posted: 22 Jun 2015 at 12:07am

Do you know how much slower the speed patrol gears are.

Posted By: DrAllis
Date Posted: 22 Jun 2015 at 6:14am

I assume the Patrol gears are the same as hi-crop at 6.6 to 1 with smaller diameter rear tire.

Posted By: autobody
Date Posted: 22 Jun 2015 at 12:33pm

So we should be able to run 6 mph in 2nd gear on a wc with 16.9-38 tires with the rc gears

Posted By: Zaddison
Date Posted: 22 Jun 2015 at 12:55pm

How many rpms are u spinning? with that tall of a tire you should be able to run 6mph in first with the WC gears. I've hit 6mph in 1st with 15.5-38s. Also I believe it takes some machining to get the rc ring and pinion to work. I was told they were a bearing short and it was fine for the little rc motor but would hold in a Wc for pulling which is y I went with the high crop ring and pinion.

Posted By: TramwayGuy
Date Posted: 22 Jun 2015 at 1:36pm

Isn't the wC high crop gearset ratio the same as RC?

Posted By: Zaddison
Date Posted: 22 Jun 2015 at 1:38pm

Yes. Its the same gear ratio but its stronger then the rc ring and pinion because the rc ran a smaller motor then the wc.

Posted By: mattb
Date Posted: 02 Jul 2015 at 8:51am

if you put rc ring and pinion in take ring gear off rc carrier and put on wc carrier has 4 spider gears instead of two.