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SportTrac Discussion
Fluids: Oil, ATF, Coolant, etc.
Rear Differential Oil Change
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<blockquote data-quote="swshawaii" data-source="post: 984084" data-attributes="member: 67547"><p>At 60K I had the same dilemma with my 3.73 open (conventional) differential.</p><p></p><p>No tag on cover, Ford Workshop Manual 75W-90, owners manual 75W-140,</p><p></p><p>Amsoil site 75W-90 OR 75W-110. Huh? I don't tow and wanted to optimize </p><p></p><p>mileage so I used the Amsoil SG 75W-90. Haven't experienced any increased</p><p></p><p>noise or heat after a long highway drive. Personally, I'm content with the lower </p><p></p><p>weight fluid and won't change it for another 60K. FYI, here's the Ford TSB.</p></blockquote><p></p>
[QUOTE="swshawaii, post: 984084, member: 67547"] At 60K I had the same dilemma with my 3.73 open (conventional) differential. No tag on cover, Ford Workshop Manual 75W-90, owners manual 75W-140, Amsoil site 75W-90 OR 75W-110. Huh? I don't tow and wanted to optimize mileage so I used the Amsoil SG 75W-90. Haven't experienced any increased noise or heat after a long highway drive. Personally, I'm content with the lower weight fluid and won't change it for another 60K. FYI, here's the Ford TSB. [/QUOTE]
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SportTrac Discussion
Fluids: Oil, ATF, Coolant, etc.
Rear Differential Oil Change
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