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| | | | Joined: Jun 2008 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2008 Posts: 47 | Hi Guys...
I installed 4.10 gears in my '49 Chevy 3600 Eaton HO52 rearend and it's ready for some fresh oil. It has the "No-Spin" Detroit locker option as well. Any recommendations on what oil to use? Do I need to add the GM additive for limited slip?
Thanks,
Dan M. | | | | | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | I have the same in my 63 C20. I been using 90w gear oil and the Stalube additive for the last ten years. You do need a limited slip additive.
Larry
I don't own a vehicle that isn't old enough to drink.
| | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | I've had the best luck using the genuine gm additive. Also found that the price is not bad either. | | | | | Joined: Jun 2008 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2008 Posts: 47 | One recommendation I heard about was to use Royal Purple synthetic oil with the GM additive. Any thoughts on this combination?
Thanks,
Dan M. | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | I'm an Amsoil fan over Royal Purple myself.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | You shouldn't need any additive with the No-Spin, it works on a different priciple from a Positrac. The additive for Posi rears is actually a friction modifier, necessary to allow the clutch packs to grab. Think of the clutches in a Posi like the clutch packs in an automatic trans, frictions and steels. Now a No-Spin is actually a ratchet mechanism, no plates or friction materials involved.
Use the same lube recommended in the manual. BTW, most performance gear lubes do already have the limited slip additive in them.
Bill Burmeister
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