A subject constantly being debated. What to use?
Maybe this one should be a sticky
http://www.widman.biz/uploads/Transaxle_oil.pdf

im always wondering this, as i can never seem to get a clear cut answer (opinions are great!) but id ideally want to use what they put in standard in the factory

On page 6 they talk about oil with or without LSD - what are the effects of putting LSD into your gearbox - a smoother trip?

anyone heard the one about a raid car using bananas as a temporary measure??

citroen handbook maitenance scedule that came with the car from the factory:-

Total EP80w/85w
Total EP80
(europe except france)
Total EP80w/85w
(france)

(wtf??)

2cv gb handbook:-
"citroen say Hypoy80 many prefer 90 or even 75/80w"

Haynes:-
Hypoid gear oil , viscositySAE80EP Duckhams hypoid 75w/90s( 90s onward version sponsored by guess who?)
cant find my first edition but think it was Castrol hypoid ep80

maitenance handbok for citroen twins
quotes Citroens Total but adds "many dealers fit ep90 as it gives quieter running.

Vikings article refers to the additives in the oil "gl4" safer on old gearboxes with non ferrous metals "gl5"spec oil may corrode those metals so best avoid them

go to your oil shop look for hypoid or EP oil in the gearbox isle choose either 80, 90 75/90( multigrade)-who makes it is almost irrelavant- and look at the small print if it says gl4/gl5 have a look for other stuff that says just gl4.

bannanas are only maginally better than dying in the Attacama desert

had a LDV van from countryside ranger service with LSD and trust me when the LSD kicked in halfway round a corner it was one bad trip man! terminal over steer to almost straght on suicidal understeer in a milliecond and back off again oversteer ,on again understeer bloody death trap! had to do corners at granny speeds

Sean

intresting pdf Viking
all written fron a 'Merkin perspective where the norm is/was to have a separate "gearbox" and "final drive"( axle) Corvair wasnt that the rear engined thing and so had combined gearbox/final drive like ours? so what suits the transmission part doesnt suit the bevel gear crown wheel in the same box.

think that Quaife were raising their eyebrows when they looked at pressures involved in 2cv final drive...but "Superfin" may be able to confirm this

right off to tip the atf out of a certain gearbox and fill it with diesel oil may be gone a while
sean

James...
Shell Spirax G 80W/90
Spirax G is API Service classification GL-4. Spirax G 80W/90 is a high quality gearbox oil for mild extreme pressure conditions.


Millers Oils Classic product range
Classic Gear Oil 80w90 - GL4
* EP Transmission oil to APIGL4 for classic transmissions
* High quality solvent refined mineral base stocks with performance additives.

Use as received in gearboxes requiring extreme pressure lubricant

Castrol site usual usless blend of hype and snake oil and so is Shell

but
Castrol "Manual" ep 80

* API Service GL4 MB 235.1 Approved
* US Military MIL-L-2105

Shell Spirax G 80W/90
Spirax G is API Service classification GL-4. Spirax G 80W/90 is a high quality gearbox oil for mild extreme pressure conditions.


Total Transmission BV 75W80 Product Features
* Fluid multigrade gear oil.
> half a page of bla ala bullshit <
* Shift feel agreement.

Specifications
* API GL-4+
* PSA Peugeot
* Citroen B71 2330

Comma gear oil
MB 10 75W-80

Service Classification: API GL4
Meets requirements of: Mercedes Benz 235.10

Think that covers all the likley candidates on the high st, forecourt and motor factors.

thank youveyr much seran, all very helpful
i shall get some soon (keep saying that :Roll: )

I have a "Repair Guide Citroën 2CV" by one Peter Russek - 1972 printing.
Dealing with the 425cc motor.
It states that the crown wheel & pinion are not of the hypoid type and that "hypoid type lubricants should not be used". "EP-SAE 80 lubricants should be used."

The Haynes 2CV manual cites Duckhams Hypoid 75W/90S for the (presumably) 602cc engine.
This oil is a GL-5 category.
Castrol equivalent/near equivalent is EPX 75W/80 .. also GL-5

The suggestion has been made that if GL-4 oil is used in an application where GL-5 is the recommended one, then the transmission components may wear more quickly.

So what's going on - are we supposed to trade off yellow metal loss against transmission (gear) wear?
I am presuming that there is "yellow" metal in the later gearboxes?
Maybe someone who has actually got their hands dirty and pulled one apart can enlighten me?

pppé,
if I said that I have had various parts of (four) A series gearbox in my grubby paws today and was also able to confirm that a 2CV's crownwheel and pinion set are not hypoid, would that answer your question?

ken

Ken, that's fine by me - I wouldn't know the difference between a hypoid crown wheel & pinion and any other (although I can tell you that my Sizaire crownwheel is of the "contrate" (not contrite) type, as it is a 3 speed diff. as well, in lieu of a gearbox.

But why, then does the Haynes manual specify the Hypoid product?

And finally, could you, having pulled all those transmissions apart, tell me finally - are the synchro rings brass/bronze or even "yellow"?

Many thanks for your info so far,
Geoff*.

* currently watching (with some anxiety) the post-lunch session of the first test at the Gabba...