Farm Equipment - 210 Gearing

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210 Gearing

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=56582
Printed Date: 18 Jul 2025 at 8:06pm
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Topic: 210 Gearing

Posted By: gcalent
Subject: 210 Gearing
Date Posted: 09 Sep 2012 at 9:36am

I am lookin for transmission gear ratios, and ground spped info for a 210, can anyone help

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Pullin With AC

Replies:

Posted By: Jordan(OH)
Date Posted: 09 Sep 2012 at 2:49pm

What size tires?

Posted By: gcalent
Date Posted: 09 Sep 2012 at 4:13pm

20.8x38 tires on it

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Pullin With AC

Posted By: JoeRepking
Date Posted: 09 Sep 2012 at 7:23pm

what kind of rpms are you turning?

Posted By: DrAllis
Date Posted: 09 Sep 2012 at 8:02pm

The four speed transmission (if it is the STANDARD tranny) is the same as a D21. Top shaft is 24 teeth-28 teeth- 34 teeth-38 teeth.....Countershaft is 42 teeth- 38 teeth- 32 teeth-24 teeth from front to rear on all gears. Ratios are 1 to 1 in 4th gear, 1.29 to 1 in third gear, 1.86 to 1 in second gear and 2.77 to 1 in first gear. Ring and pinion is 10 teeth to 37 teeth for 3.70 to 1 ratio. Unfortunately I can't tell you what the final drive ratio is because the Service manual or Parts books don't say. The actual ground speeds with the same tire and RPM's wind up being the same as a D21 tractor even tho the 210-220 have one more tooth (10 and 37) on the R&P pinion gear than a D21 (9 and 37). They sped up the R&P 10% and then slowed it back down in the final drives for the same ground speeds.

Posted By: injpumpEd
Date Posted: 09 Sep 2012 at 9:33pm

Finals are 6.69? Can't remember the exact #. It is in my service manual. 5th gear (std) is in the 50:1 area, Slow 1st/5th is 73:1 area. 6th is 45:1, and 7th is 31:1, then 8th is 24:1. These are approximate, my sheets are out in the shop, and I'm too lazy! Lol!

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

Posted By: DrAllis
Date Posted: 10 Sep 2012 at 6:55am

You'd be keerect Ed!!...I looked at an Owners manual this morning and it doesn't give an actual tooth count, but the finals are 6.69 to 1 ratio. So, the tooth count must be 15 to 100?? or 16 to 107??...if someone has one apart, I'd like to know so I can write it in my Service manual.

Posted By: gcalent
Date Posted: 10 Sep 2012 at 12:50pm

Thanks for the help

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Pullin With AC

Posted By: ALLISMAN32
Date Posted: 10 Sep 2012 at 10:52pm

DR. are you wanting the bull pinion drive and bull gear tooth count?

Posted By: Butch(OH)
Date Posted: 11 Sep 2012 at 5:49am

Were the range transmirssion and low gear options for the 220 also offered on the 210?

Posted By: injpumpEd
Date Posted: 11 Sep 2012 at 6:31am

yes, most 210's either have "slow first & fifth", and a few (mine included) have the "fast low range" .

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!