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Old 06-18-2020, 12:26 PM   #35
solidaxle
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Join Date: Mar 2011
Location: upstate NY
Posts: 478
Default Re: Transmission oil

This good timing for me. Just did a rebuild on my toploader. With all the discussion on what to use for oil, I went to the NAPA main hub and read all the labels of gear oil. The ones they had on the shelf were GL-4/GL-5 and stated "For Non-Synchronized Transmissions".
So I ask the counter guy for GL-1, who looked it up in the catalog. Sure enough they carry 90w GL-1 under heavy duty oil. It's just not on the customer shelves, you have to ask. It lists for $31.08, with a NAPA account it's only $18.99 a gallon.
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