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'37 Packard Transmission oil
#1
Just can't stay away
Just can't stay away

Dbedsole
See User information
Can someone recommend an oil for my synchromesh manual transmission? I know to stay away from GL4 and GL5 Extreme pressure because the additives will attack the yellow metal (brass).

Posted on: 2024/6/8 10:15
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Re: '37 Packard Transmission oil
#2
Just popping in
Just popping in

Brian Hart
See User information
Apparently this General Motors product is GL4 (yellow metal friendly) and available through most dealers.

parts.gmparts.com/product/acdelco-gm-ori ... d-transfer-case-fluid-1-qt-88861800
Click to see original Image in a new window

Posted on: 2024/6/8 12:55
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Re: '37 Packard Transmission oil
#3
Webmaster
Webmaster

BigKev
See User information
90w GL-1 (Mineral Oil). Napa sells it. Also can be used in your steering box.

Posted on: 2024/6/8 19:08
-BigKev


1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog
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Re: '37 Packard Transmission oil
#4
Just can't stay away
Just can't stay away

Dbedsole
See User information
Thanks for the responses. I purchased SAE 90 API GL-1 mineral gear oil (no additives) from Tractor Supply. Used in Ford Tractor Transmissions 1939-52.

Posted on: 2024/6/10 11:35
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Re: '37 Packard Transmission oil
#5
Home away from home
Home away from home

Ken_P
See User information
+1 for GL-1 mineral oil. It made both transmission and steering gear feel much better.

Posted on: 2024/6/16 11:28
1937 120 1092 - Original survivor for driving and continued preservation. Project blog / Registry

1937 115 1082 - Total basket case, partial restoration, sold Hershey 2015 Project blog / Registry
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