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11-11-2013, 02:26 AM
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#1 |
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Registered User
 
Join Date: Sep 2013
Location: iredell county, nc
Posts: 77
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HO72 Gear Lube
Just like the title says what gear oil should I run? Also about how much does it hold? I figure any GL-5 between 75w90 and 85w140 should be fine but want to be sure.
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Real trucks have a clutch. Please inform automakers.  1972 GMC, K25, 383 stroker, SM465, NP205, Eaton HO-72 |
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11-11-2013, 12:54 PM
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#2 |
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Registered User
Join Date: Apr 2013
Location: Brighton, WI
Posts: 504
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Re: HO72 Gear Lube
i used regular gear oil, 75-90 i believe. I pull the plug and filled it until it came out the hole.
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11-11-2013, 11:56 PM
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#3 |
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Registered User
Join Date: Sep 2013
Location: iredell county, nc
Posts: 77
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Re: HO72 Gear Lube
ttt
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Real trucks have a clutch. Please inform automakers. 1972 GMC, K25, 383 stroker, SM465, NP205, Eaton HO-72 |
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11-13-2013, 10:36 PM
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#4 |
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Registered User
Join Date: Apr 2003
Location: New Orleans area
Posts: 198
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Re: HO72 Gear Lube
According to my '67 Chassis Service Manual:
Lubricate with Multi-Purpose gear lubricant meeting requirements of U.S. Ordnance Spec. MIL-L-2105B Below 10F SAE 80 Up to 100F SAE 90 Above 100F Consistently SAE 140 No fill capacity in print that I can find. Several years ago, I filled my bone dry HO52 with approx. 3qts. give or take. (Beware! my memory may be faulty!). I say "bone dry" because I had the rear end apart for a carrier swap and total clean and scrub to remove metal dust and particles. I used 80/90 GL-5 gear oil. Hope this is of some use. |
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11-13-2013, 10:44 PM
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#5 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: HO72 Gear Lube
Regular gear lube, but from what i have been told if you have the no spin diff you need a limited slip additive, available at your local auto parts store.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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11-13-2013, 10:48 PM
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#6 |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: HO72 Gear Lube
2½ is in my memory for some reason. It has been a while and I want to say the brand name was JL-7??? Some red goo that my uncle used to use in semi rear diffs.
I bought 3 quarts and tried to put it all in but it was oozing out of the fill hole. I was on a slanted driveway though. Like C20pickup said, fill until it oozes out. Put the plug in and drive away. Good luck buddy.
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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11-14-2013, 01:10 AM
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#7 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,586
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Re: HO72 Gear Lube
Pretty sure 3 qt. will fill it and maybe have some left over. I used Mobil-1 full synthetic 75W-90, but any brand will do the job, and dino is okay too. I just preferred synthetic.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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