Kfigel Posted May 11, 2022 Share Posted May 11, 2022 (edited) Can anyone suggest a brand and/or type of transmission oil to use in my 1922 Studebaker Big Six? Just drained the old oil, and the service manual just says to use a quality transmission oil as a replacement. Is the 600 w fluid that I see for Model A's ok? Thanks Edited May 11, 2022 by Kfigel (see edit history) Link to comment Share on other sites More sharing options...
JFranklin Posted May 11, 2022 Share Posted May 11, 2022 I would use 140 gear oil GL-4 Link to comment Share on other sites More sharing options...
Porsche 68 Posted May 13, 2022 Share Posted May 13, 2022 I use the 600wt oil in all the pre war cars quiets the transmissions down no leaks shifts better when warm Link to comment Share on other sites More sharing options...
Kfigel Posted May 14, 2022 Author Share Posted May 14, 2022 On 5/11/2022 at 5:05 PM, JFranklin said: I would use 140 gear oil GL-4 Thanks Link to comment Share on other sites More sharing options...
Kfigel Posted May 14, 2022 Author Share Posted May 14, 2022 On 5/13/2022 at 7:16 AM, Porsche 68 said: I use the 600wt oil in all the pre war cars quiets the transmissions down no leaks shifts better when warm Thanks 1 Link to comment Share on other sites More sharing options...
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