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Old Feb 26, 2021 | 12:28 PM
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Default Muncie lube

My '69 muncie 4 spd calls for GL-4 75w90 gear lube which is very hard to find since most companies now only make GL-5 oils, which may or may not be bad of yellow metals, depending on who you believe. Recommendations are to avoid synthetics as they may be too slick. Weird huh, synthetic lubes/oils of most kinds are generally superior.
So, what are you guys using?
I'm in southern Ca. so cold temps aren't a problem, but the car has started shifting hard when hot lately, so I thought a lube change would be the first thing to do. Lube is 15+ yrs old.
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Old Feb 26, 2021 | 02:02 PM
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I’ve been a fan of Swepco products for my Muncie. The 202MolyXP 75W90 would be my recommendation.
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Old Feb 26, 2021 | 02:37 PM
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driven gear oil

https://drivenracingoil.com/i-304977...-gear-oil.html
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Old Feb 26, 2021 | 04:07 PM
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This is what I use based on the recommendation of Jody's transmissions. https://www.crcindustries.com/produc...l-SL24239.html
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Old Feb 26, 2021 | 07:34 PM
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Originally Posted by Sigforty
This is what I use based on the recommendation of Jody's transmissions. https://www.crcindustries.com/produc...l-SL24239.html
This is readily available locally from Napa or Amazon.
Thank you.
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Old Feb 26, 2021 | 09:52 PM
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Sta-lube 85W-90 hypoid oil. GL-4

Last edited by kodpkd; Feb 26, 2021 at 09:53 PM.
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