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Old 01-13-2014, 08:17 PM   #1
69Cobra
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Default Re: Are synthetic oils and lubricants any quicker

Question. If you put seals or baffles in the tubes to keep the lube at the gear do you need to worry about axle bearings?
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Old 01-13-2014, 08:25 PM   #2
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Default Re: Are synthetic oils and lubricants any quicker

If your axle bearings are sealed, I wouldn't know why.
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Old 01-13-2014, 09:03 PM   #3
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Default Re: Are synthetic oils and lubricants any quicker

been a long day lol.
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Old 01-13-2014, 10:31 PM   #4
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Default Re: Are synthetic oils and lubricants any quicker

Quite a few years ago, I read an article in a MuscleCar magazine in which they did a back to back comparison of regular and synthetic lubes in a '69 Hemi Charger with an A-833 4-speed and a Dana 60. IIRC the total difference between dinosaur oils and synthetics in engine/trans and axle was 3 tenths. Car went from 13.00 to 12.70 doing nothing but changing to synthetic lubes.
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Old 01-13-2014, 11:38 PM   #5
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Default Re: Are synthetic oils and lubricants any quicker

My p.o.s. didn't show anything when I switched.
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Old 01-14-2014, 12:18 AM   #6
8secchevelle
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Default Re: Are synthetic oils and lubricants any quicker

Alan I had this conversation with mr. B about the gl6 lube but I have not been able to locate any , is it available in the Nashville area? Thanks .
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Old 01-14-2014, 08:09 AM   #7
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Default Re: Are synthetic oils and lubricants any quicker

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Originally Posted by 8secchevelle View Post
Alan I had this conversation with mr. B about the gl6 lube but I have not been able to locate any , is it available in the Nashville area? Thanks .

Richmond synthetic gear oil is API GL-6. I suspect that Royal Purple synthetic is also API GL-6, although they say to use it where GL-4 or GL-5 is required, it is not actually API rated. Torco and Redline both state their gear oil is GL-6.

The GL-6 designation is no longer required by any major OE, and as such is considered "obsolete". However, GL-6 is precisely what is required for drag racing, as it is the oil required for high hypoid, high pinion offset, extreme impact, extreme load applications.

You probably will not find a GL-6 lube on the shelf at a typical parts house.

Note that the looser you run your gears, the higher viscosity you need for severe impact protection.
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