Quick question

[joinerman]

As my 80 hasn't sold yet i am going to change the oils, am i correct in saying the front & rear diffs take the same oil API GL 5 SAE 90, it's not made clear in either Haynes or Max Ellory

 

[Chris]

Front and rear are the same. Transfer is different

Chris

 

[joinerman]

Thanks Chris, yes I've got the transfer sorted.

 

[frank rabbets]

They must be "EP". 90 is difficult to get but 80 is OK.

Frank

 

[joinerman]

This is what it says in the Max Ellory book Frank

API GL 5 SAE 90,

 

[joinerman]

Another question, when i went in the motor factors this morning to get the transfer case oil the bloke said do you want mineral or synthetic, not sure says i,

 

[clivehorridge]

I was under the impression that EP refers to mineral whereas SAE relates to synthetic, but both are the same in respect of the viscosity number 80 or 90 or otherwise.

Is this hogwash or correct? (or even close?)

 

[Rob]

Hogwash Clive. EP stands for extreme pressure and is only recommended to use in gearboxes with hypoid gears like most LC diffs. SAE I think it's just the viscosity scale/units or something like that. Both can be synthetic or mineral. As long as it's GL5 and preferably EP rated and the correct viscosity then it does not matter if it's synthetic or not.

Sent from my GT-I9100 using Tapatalk 2

 

[frank rabbets]

Hi Joinerman

I would not put any oil in the axles unless it said"EP" on the container. As Rob says = "Extreme Pressure" which the hypoid gears in there need. Some oil manufacturers are dropping the "EP" part and still recommending their oil for hypoid gears but as I always play safe and go for the "EP". The SAE or viscosity is less important.

It does not matter whether you use synthetic or mineral in the transfer box.

Frank

 

[Graham]

SAE = Standard Automotive Engineers.
It is a "standard" as Rob pointed out.

Typically used for differing oil viscosity.

Gra.

 

[joinerman]

Thanks all for your replies, i shall go back to the motor factors with a bit more info in my armory, might look as if i know what I'm talking about, lol

 

[clivehorridge]

Hogwash Clive. EP stands for extreme pressure and is only recommended to use in gearboxes with hypoid gears like most LC diffs. SAE I think it's just the viscosity scale/units or something like that. Both can be synthetic or mineral. As long as it's GL5 and preferably EP rated and the correct viscosity then it does not matter if it's synthetic or not.

Sent from my GT-I9100 using Tapatalk 2

Thanks for the clarification Rob! Just goes to show how misinformation can be even more confusing in the wrong hands (meaning mine!)

it is complicated when three are so many different references for what appears to be the same thing, SAE, EP, Hypoid, DOTs and the like. It's a language only the specialists can speak...

 

[frank rabbets]

Just to complicate things further the 80 gearbox synchro rings are made of bronze. EP oils attack bronze so don't use it in the gearbox. I think the transfer box has synchro rings as well. I'll check.

Frank

 

[adrianr]

I think the transfer box will have frank - you cannot get into low realistically until you stop - but you can upchange into high ratio whilst driving

 

[grantw]

wrong thread post

 

[frank rabbets]

I cannot see any synchro rings in the diagram. Just a sraight change.

Frank

 

[Roger Fairclough]

SAE = Standard Automotive Engineers.
It is a "standard" as Rob pointed out.

Typically used for differing oil viscosity.

Gra.

SAE stands for Society of Automotive Engineers. They are based in America and are recognised for supplying various standards in the automotive industry.

Roger

 

[Ian Chuter]

They must be "EP". 90 is difficult to get but 80 is OK.

Frank

If your after EP90 you could try your local agricultural dealer. I work for one and we sell loads of it but usually in 20Ltr cans
Hope that helps

 

[Towpack]

Most car accessory shops I've been in sell EP90. Carlube is one brand that's easy to get hold of.

 

[Dave_S]

Aye, EP90 is the oil of choice for Landies - dead common in the UK - any garage/expert that tells you otherwise should be avoided like the plague...