GL-5 gear oil
plymouth
Posted 2018-07-13 8:10 PM (#566567)
Subject: GL-5 gear oil



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Location: McComb, Mississippi
A few months ago, I changed out all of the seals in my Imperials rear axle. It's not a limited slip type. At the time, I filled it up with dino gear oil. A friend just gave me a couple of bottles of GL-5 75w90 synthetic gear oil. I'm wanting to confirm that this oil is safe to use in the rear axle. I think it should be fine, but wanted to ask some of the experts. Thanks
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Shep
Posted 2018-07-13 8:17 PM (#566568 - in reply to #566567)
Subject: Re: GL-5 gear oil



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Good to go.
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1960fury
Posted 2018-07-13 9:12 PM (#566570 - in reply to #566567)
Subject: Re: GL-5 gear oil



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200k+ miles no problems with synthetic 75w90 gear oil. 60 Plymouth/61 Desoto.
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plymouth
Posted 2018-07-17 8:42 AM (#566728 - in reply to #566567)
Subject: Re: GL-5 gear oil



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Thanks guys. I siphoned all of the old gear oil out(only a few months old), It took a few hours with the little gravity pump. The oil looked like it was 20 years old. I guess because it helped flush out the OLD gear oil. Anyways, I filled it up with two quarts of the synthetic stuff. While I was at it I also cleaned the breather. It seems like I read somewhere on here that you can replace the breather cap with a piece of oil resistant hose and a fuel filter. I may try that. Haven't got to drive the car yet since I changed up the gear oil as I'm waiting on my front disc brake conversion kit to arrive.
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1960fury
Posted 2018-07-17 9:04 AM (#566730 - in reply to #566728)
Subject: Re: GL-5 gear oil



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plymouth - 2018-07-17 8:42 AM

I read somewhere on here that you can replace the breather cap with a piece of oil resistant hose and a fuel filter.


Yes, I wrote/did that. Basically only because if you drive fast the OE vent likes to puke oil, but that mod is not needed in an Imperial.
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plymouth
Posted 2018-07-17 11:56 AM (#566737 - in reply to #566567)
Subject: Re: GL-5 gear oil



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Location: McComb, Mississippi
Thanks Sid! You're the man.
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