Construction and other equipment - model m trans and final fluid?

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model m trans and final fluid?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=151732
Printed Date: 20 Aug 2025 at 8:02am
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Topic: model m trans and final fluid?

Posted By: Matterhorne9
Subject: model m trans and final fluid?
Date Posted: 02 Jul 2018 at 1:15pm

the manual said 30 to 50 w oil for the trans and finals. mine had 75w-90 in them. should i stick with the current oil or go back to the factory spec?

Replies:

Posted By: CAL(KS)
Date Posted: 05 Jul 2018 at 8:27am

80-90 is fine unless you run it during the cold montana winters, then you might consider a lighter weight oil for winter use if my assumption of your location of Billings is correct.

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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15

Posted By: Matterhorne9
Date Posted: 05 Jul 2018 at 8:30am

Thats the conclusion i came up with. But oil any oil at this pioint is better then what was in it. Hahaha thanks