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Oil for transfer case API sa vs sb #4803609
07/02/18 10:22 PM
07/02/18 10:22 PM
Joined: Mar 2013
Posts: 777
NY
joegreen Offline OP
joegreen  Offline OP
Joined: Mar 2013
Posts: 777
NY
So my transfer case requires sae 30 non detergent oil. I have been using sae 30nd sb rated oil. Most of the cheap non detergent oils I find are sa rated. I couldnt find what the difference in sa vs sb really was. I would like to use supertech sae 30nd but it's sa rated. I just am not sure if sa rating is not robust enough for a chain drive transfer case.


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: Oil for transfer case API sa vs sb [Re: joegreen] #4803638
07/03/18 12:01 AM
07/03/18 12:01 AM
Joined: Dec 2012
Posts: 556
Cave City KY
jakewells Offline
jakewells  Offline
Joined: Dec 2012
Posts: 556
Cave City KY
Not really going to matter if you use either but using SA is not going to hurt anything they are practically the same.


1994 Ford F150 302 4R70
Chevron Delo SAE 30 CF/SL Fram XG8A

1978 Chevy Nova 250 I6 Borg Warner T5
Rotella 10W40 Fram XG5

Re: Oil for transfer case API sa vs sb [Re: joegreen] #4803735
07/03/18 07:50 AM
07/03/18 07:50 AM
Joined: Oct 2014
Posts: 1,226
NoVA
Jimzz Online happy
Jimzz  Online Happy
Joined: Oct 2014
Posts: 1,226
NoVA
SA means no testing is required, its basic pure petroleum oil with nothing else in it.

SB means it has some basic corrosion inhibitors and other light additives.

I would at least try to get the SB if you can.


yup
Re: Oil for transfer case API sa vs sb [Re: joegreen] #4803790
07/03/18 08:52 AM
07/03/18 08:52 AM
Joined: Nov 2004
Posts: 1,803
SD
zrxkawboy Offline
zrxkawboy  Offline
Joined: Nov 2004
Posts: 1,803
SD
NAPA 30 nd is SB.


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: Oil for transfer case API sa vs sb [Re: joegreen] #4803982
07/03/18 12:55 PM
07/03/18 12:55 PM
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
SA oils have some Anti-Foam but no Anti-Wear additives.

I would use a later API oil that has some Anti-Wear additives.


Reading is fundamental; understanding is not a given ability.
Re: Oil for transfer case API sa vs sb [Re: MolaKule] #4804049
07/03/18 02:32 PM
07/03/18 02:32 PM
Joined: Mar 2013
Posts: 777
NY
joegreen Offline OP
joegreen  Offline OP
Joined: Mar 2013
Posts: 777
NY
So my transfer case is a new process 203. Some manuals call for 10w40 but it was specced for 30nd. I was using napas 30nd because it was sb I just didn't want to spend for sb if cheaper sa was fine. There was mention about 10w40 foaming up from the chain whipping around and that 30nd did not have this issue. This is an AWD transfer case where the chain is always spinning even in 2 wheel drive.


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: Oil for transfer case API sa vs sb [Re: joegreen] #4804350
07/03/18 07:04 PM
07/03/18 07:04 PM
Joined: Mar 2013
Posts: 777
NY
joegreen Offline OP
joegreen  Offline OP
Joined: Mar 2013
Posts: 777
NY
Any thoughts on 10w30 vs 30nd for chain and gear lubrication and foaming?


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: Oil for transfer case API sa vs sb [Re: joegreen] #4804614
07/04/18 01:00 AM
07/04/18 01:00 AM
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
Love the K20 as that was when PU trucks looked like trucks.

As far as the TC lube, I would go with a 10W40 mineral oil since the mineral oil usually thins to 30 grade when hot.


Reading is fundamental; understanding is not a given ability.
Re: Oil for transfer case API sa vs sb [Re: joegreen] #4807785
07/07/18 03:56 PM
07/07/18 03:56 PM
Joined: Oct 2014
Posts: 740
Pa, USA
NH73 Offline
NH73  Offline
Joined: Oct 2014
Posts: 740
Pa, USA
Don't today oils have anti foam agents in it? Wouldn't modern 10w40 work?


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2012 Gravely ZT XL 48 w/ Kawasaki FR730

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