Farm Equipment - 30W transmission oil

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30W transmission oil

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=27092
Printed Date: 27 Feb 2025 at 11:34am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 30W transmission oil

Posted By: bucagator
Subject: 30W transmission oil
Date Posted: 10 Mar 2011 at 6:06pm

We are putting back together our Allis G and the manual calls for 30W transmission oil. We can't find a single parts dealer that knows what this is in our area. Since the manual was written 60 years ago much has changed and hopefully someone can help us find the right oil. Any ideas? Thanks in advance.

Replies:

Posted By: GregLawlerMinn
Date Posted: 10 Mar 2011 at 6:59pm

30 wt non detergent oil?

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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC

Posted By: bucagator
Date Posted: 11 Mar 2011 at 6:03pm

I have been told that transmission oil is numbered differently than motor oil. I'm not sure if that is correct though.

Posted By: Coke-in-MN
Date Posted: 11 Mar 2011 at 7:11pm

they used SAE#20 or SAE#30 back then but now i would use Universal tractor-hydraulic oil in any place that calls for the old oils.

Transmission oil started at 70 weight or so / Gear oils are now called GL series oils.

Oils are rated by weight using the SSU formula of so much passage through a certain size opening at a controlled temp. and measured in seconds to pass a certain volume.

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