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Gear Oil
#1
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wjames
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Sorry but I search but I did not find an answer to my question, I am sure that has been touched on before

1936 120

Bought SAE 80-90 GL5 for my trans, steering box etc. It says that I should use GL1. Can I use this?

Bought SAE 85-140 GL5 for my differential. It says that I should use GL1. Can I use this?
Thanks again
Will

Posted on: 2022/6/4 11:14
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Re: Gear Oil
#2
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JWL
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GL-1 for transmission and GL-5 for differential. Differential needs extreme pressure lubricant and will get damaged if GL-5 is not used.

Posted on: 2022/6/4 12:01
We move toward
And make happen
What occupies our mind... (W. Scherer)
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Re: Gear Oil
#3
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DavidPackard
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Will;

GL-1 is used for the transmission, and overdrive if so equipped.
GL-5 is used in the differential.

Dp

Edit: In addition to JWL’s comment, GL-5 oil has anti-wear compounds containing sulfur and phosphorous compounds that will degrade brass, bronze and copper. Using GL-5 in a transmission that contains any such ‘yellow’ metals would be ill-advised.

Posted on: 2022/6/4 12:02
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Re: Gear Oil
#4
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Ken_P
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Absolutely use GL-1 in the transmission. You can get a gallon of it pretty cheap at Napa. Made a HUGE difference in the shifting on my 120.

Posted on: 2022/6/4 13:01
1937 120 1092 - Original survivor for driving and continued preservation.
http://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=16514&forum=10

1937 115 1082 - Total basket case, partial restoration, sold Hershey 2015
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?start=0&topic_id=6550&order=ASC&status=&mode=0
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Re: Gear Oil
#5
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wjames
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Thank guys
You are the best
W

Posted on: 2022/6/4 13:46
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