Transmission, Differential, and Hydraulic Fluid

[whitakerdr]

The Ford manual said to use Gear oil M-4864-A & B depending on weather. What do you recommend on 1951 Ford 8N?

Traveller 590901 Premium Universal Tractor Trans/Hydraulic Fluid
a specially formulated, premium multigrade (SAE 10W-30) fluid blended with the highest quality lubricating oils and the most technologically advanced additive system.

or

Traveller TS40402G Ford Tractor All Mineral 90 Transmission Fluid is a high quality hydraulic fluid for use in older Ford tractors.
API Service GL-1
For use in final drives, hydraulic systems and manual transmissions of Ford Tractors manufactured between 1939 and 1952

This post was edited by whitakerdr on 06/08/2021 at 07:47 am.

 

[TheOldHokie]

(quoted from post at 10:36:23 06/08/21) The Ford manual said to use Gear oil M-4864-A & B depending on weather. What do you recommend on 1951 Ford 8N?

Traveller 590901 Premium Universal Tractor Trans/Hydraulic Fluid
a specially formulated, premium multigrade (SAE 10W-30) fluid blended with the highest quality lubricating oils and the most technologically advanced additive system.

or

Traveller Ford Tractor Hydraulic Oil 3/2 Gallon
API Service GL-1. For use in final drives, hydraulic systems, and manual transmissions of Ford Tractors manufactured between 1939 and 1952.

This post was edited by whitakerdr on 06/08/2021 at 07:37 am.

M4864A/B was mild EP gear oil in SAE grades 80 and 90.

The universal tractor fluid is a SAE 80 API GL4 gear oil well suited for common sump tractor hydraulic systems, transmissions, and final drives. That is what I use and recommend.

The Traveller Ford tractor oil is a SAE 90 API GL1 oil poorly suited for use in tractor hydraulic systems and final drives. It has no EP additives and is about the poorest choice available. If you want a grade 90 oil use just about any SAE 80W90 gear oil. It has better viscosity and wear properties than any GL1 oil.

TOH

 

[whitakerdr]

Thanks