Wrong oil in the transfer and gearbox.

Right,
I've f**cked up. I bought the oils to do my box's and diffs. 80/90 for the diffs and transfer box and mtf94 for the gear box (300tdi manual).

In a mad rush ive put the mtf in the transfer box and the 80/90 in the gearbox. I know im a plank:doh:

I was thinking about leaving the 80/90 in the gearbox as it seems ok, it's a bit notchy when cold but ok when warm. But was going to drop the mtf out of the transfer box and replace with 80/90.

My questions: Will the gearbox be ok with the 80/90 in? could I leave the mtf in the transfer box (I wouldn't have thought so)?

I use it offroad ar playdays and greenlaning so it get's a bit of stick.

Cheers.

No no no!!!
Yer gearbox has a little oil pump on it. The EP90 will fook it and then yer box.
Gerrit out quick.

Is that true that it will Feck it up??? I know there is small plastic gears in the pump.

I thought they only used ATF to get the gearchange when cold half decent? Was told that you cannot use friction reducing lubricants because it needs some resistance to be able to change properly.

If it were me I would change the oil just because I'm like that I wouldn't worry about it too much just drain it out and refill it with dextron II or III, even if a little ep 90 is in there it won't hurt when its mixed. Jai

It would be a grave error to leave the oils as they currently are.

Imo you need to drop the oils out of the two gearboxes, collect the oil in a suitable container and then put the oils back in the places they need to go.

To leave them in situ is likely to do irrepairable damage to both.

Drain them out and replace correctly or you will be replacing the gearbox and transfer case soon.

MTF94 is a GL4 75w-80 gear oil the same spec of multigrade oil that can be used in the transfer box and diffs. Although there's a GL4 oil with the viscosity of 80w-90. It all depends what is ambient temperture where you are.

I picked up some MTF 94 today and it feels LOADS lighter than the EP 90 I normally use.


Apart from anything else, MTF is supposed to have a mix of additives and friction modifiers that help the synchros to work properly. If you have EP 90 in a gearbox the synchros won't work and it will affect the change quality and wear the synchros - NOT GOOD.

EP90 is to heavy for any gearbox i would think, although I have a car (not a LR) with a gearbox that uses straight GL4 EP80.

GL5 has more "slip" additives than GL4 and its claimed that the synchro cones don't work well with it. GL5 is or was rumoured to be more damaging to brass/bronze components.

Thanks for the replys.

I'm gonna drop the oils out and either swap them (depending on losses/spillage/contaminiation) or replace them. More cost:doh: Its owes me a small fortune this month

Note to self: Must try harder

daveyboy300tdi said:

More cost:doh: Its owes me a small fortune this month

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whats so unusual about that?

regards

Dave

Dave 2000 said:

whats so unusual about that?

regards

Dave

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Nothing at all... reading the forum, at least I know I'm not alone

daveyboy300tdi said:

Nothing at all... reading the forum, at least I know I'm not alone

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what year is your disco davey?

1994 up to january 1998 the R380 gearbox takes ATF DII not MTF94

pussyeater said:

what year is your disco davey?

1994 up to january 1998 the R380 gearbox takes ATF DII not MTF94

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Not quite correct, have a look at this link to Ashcroft's site and FAQ "what oil should I put in my R380 gearbox". http://www.ashcroft-transmissions.co.uk/faq.html

The thinking now in some places is to use MTF oils in both of the gearboxes as ATF was only used to stop stiff gear changing when cold. Also ATF is to thin in hot climates so normal gear oil is used there.

discool said:

Not quite correct, have a look at this link to Ashcroft's site and FAQ "what oil should I put in my R380 gearbox". Ashcroft Transmissions

The thinking now in some places is to use MTF oils in both of the gearboxes as ATF was only used to stop stiff gear changing when cold. Also ATF is to thin in hot climates so normal gear oil is used there.

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That's their own recommendation bud

Land Rover and all oil companies recommend ATF dII in the R380 g/box from 94-98 and either 80w-90 or 75w-90 in the t/box

pussyeater said:

That's their own recommendation bud

Land Rover and all oil companies recommend ATF dII in the R380 g/box from 94-98 and either 80w-90 or 75w-90 in the t/box

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I don't think so. MTF94 is the reccomended all for all R380 applications, currently.

It would be an accurate statement to say that when the vehicles were originally built, Dexron II was the reccomended lube, but since the introduction of MTF94 (which LR markets as the oil for their manual geaboxes !!) that is the oil to use.

So, what is the difference?

Well, manual gearboxes have synchros to aid smooth gear changing, these synchros REQUIRE a certain amount of friction to work properly, Dexron ATF's don't give this friction. That's why you will always get a better gearchange if the box contains MTF94.

Not pretending to be an expert, but have read up quite a lot on this subject I side with MTF, as do LR, so I reckon MTF94 IS the one to use.

thebiglad said:

I don't think so. MTF94 is the reccomended all for all R380 applications, currently.

It would be an accurate statement to say that when the vehicles were originally built, Dexron II was the reccomended lube, but since the introduction of MTF94 (which LR markets as the oil for their manual geaboxes !!) that is the oil to use.

So, what is the difference?

Well, manual gearboxes have synchros to aid smooth gear changing, these synchros REQUIRE a certain amount of friction to work properly, Dexron ATF's don't give this friction. That's why you will always get a better gearchange if the box contains MTF94.

Not pretending to be an expert, but have read up quite a lot on this subject I side with MTF, as do LR, so I reckon MTF94 IS the one to use.

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here's some lubematch tools so you can see for yourself, these are upto the minute accurate with info supplied solely by the manufacturers

http://www.castrol.com/castrol/iframe.do?categoryId=9024084&contentId=7044829

LubeMatch - United Kingdom

Welcome to the Comma Oil & Chemicals Ltd. Website go to application

you will see that all of them list MTF oil (or their own version of it) but if you see the notes f and g next to the capacities and read what they mean they all say that for R380 gearboxes between 1994 - 1998 take ATF fluid

so you are right and wrong at the same time

R380 gearbox takes MTF94 except between the build time of 1994 - 1998

ps ATF fluids are friction modified to create friction just like MTF's, if they weren't the auto box wouldn't work

pussyeater said:

here's some lubematch tools so you can see for yourself, these are upto the minute accurate with info supplied solely by the manufacturers

http://www.castrol.com/castrol/iframe.do?categoryId=9024084&contentId=7044829

LubeMatch - United Kingdom

Welcome to the Comma Oil & Chemicals Ltd. Website go to application

you will see that all of them list MTF oil (or their own version of it) but if you see the notes f and g next to the capacities and read what they mean they all say that for R380 gearboxes between 1994 - 1998 take ATF fluid

R380 gearbox takes MTF94 except between the build time of 1994 - 1998

ps ATF fluids are friction modified to create friction just like MTF's, if they weren't the auto box wouldn't work

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I have reread your post several times and looked at the sites you proposed and I'm still convinced that the only correct oil to go in an R380 gearbox is MTF94.

I checked the various search engines and none of them listed, to my satisfaction, UK market specs, Discovery TDi 300 specifically as opposed to a combo of 200 & 300, so no, I do not accept that I was wrong.

I have my opinion and and happy with it and it would appear that LR, the vehicle manufacturers, agree with my stand.

I have nothing more to add.

thebiglad said:

I have reread your post several times and looked at the sites you proposed and I'm still convinced that the only correct oil to go in an R380 gearbox is MTF94.

I checked the various search engines and none of them listed, to my satisfaction, UK market specs, Discovery TDi 300 specifically as opposed to a combo of 200 & 300, so no, I do not accept that I was wrong.

I have my opinion and and happy with it and it would appear that LR, the vehicle manufacturers, agree with my stand.

I have nothing more to add.

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Try this PDF it produced By ZF and lists all their gearboxes etc and the recommended grade and type of oil required. http://www.zf.com.au/Tech Info/Lubrication Lists/TE-ML 11.pdf

redhand said:

Try this PDF it produced By ZF and lists all their gearboxes etc and the recommended grade and type of oil required. http://www.zf.com.au/Tech Info/Lubrication Lists/TE-ML 11.pdf

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Thanks for that Redhand, but I'm not sure what that has to do with the R380 gearbox under discussion?? Have I missed something??

thebiglad said:

Thanks for that Redhand, but I'm not sure what that has to do with the R380 gearbox under discussion?? Have I missed something??

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Sorry I thought you was on about an Autobox. It's been a busy day..