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Nissan D21 gearbox, engine oil not gear oil.

 
 
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Barnyzuki
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PostPosted: Thu Mar 22, 2007 8:44 pm    Post subject: Nissan D21 gearbox, engine oil not gear oil. Reply with quote

Hi all, a strange question for you to answer !

I have just had my Nissan D21 gearbox re-built, the guy that did it has stated I must use engine oil and not gear oil in the main gearbox.

Transfer box is fine, EP 80 or 90, but he won`t accept a warranty claim if I use gear oil in the rebuilt box.

WTFlipping heck is that all about then ?
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spannerman69
Mud Obsessed


Joined: 01 Oct 2003
Odometer: 2807
Location: st.helens



PostPosted: Thu Mar 22, 2007 9:37 pm    Post subject: Reply with quote

barny let me know what vehical this is for and i`ll look it up on the autodata for you.

graeme
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Drift
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PostPosted: Thu Mar 22, 2007 11:05 pm    Post subject: Reply with quote

Its not that strange my 2.8 Frontera and my old 20L frontera both have Isuzu gearbox's and use engine oil Wink
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DifflockPeter
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PostPosted: Sat Mar 24, 2007 12:35 am    Post subject: Reply with quote

Hi Barny

The Nissan D21 pickup manual gearbox can be refilled with a dedicated gear oil (but see later for spec) It does not have to use engine oil and indeed, as you may have read we don't recommend the use of engine oil in manual gearboxes.

If you choose to use engine oil in your gearbox, we very strongly recommend that you change the oil in the box at the SAME time as you change your engine oil (i.e. no more than 6,000 miles). This is because in manual gearboxes, engine oil provides limited extreme pressure protection and the viscosity improvers within it tend to shear down faster, again reducing protection since the lubricating film thins out.

The most likely reason your supplier is recommending you use engine oil is that he is concerned about the effects of certain sulphur bearing EP additives on the copper alloys typically found in older gearboxes (ie synchro rings).

Dedicated Gear oils meeting API GL5 rating tend to have levels of these problem EP additives which can give rise to leaching of the copper and weakening of the alloy.

For this reason you should make sure that you select a gear oil of API GL4 rating. This can be monograde EP90 or better still EP80W90 (multigrade which is better for cold starting lubrication on winter mornings). GL4 lubes will not give rise to copper leaching effects.

Of course, if you want the very best for your box then you can use our very own Evolution 2 Fully Synthetic Gear Oil which gives the highest levels of protection and efficiency and even achieves GL4 and GL5 specs WITHOUT potentially harmful additives.

If you are looking for a good old fashioned plain mineral EP80W90 GL4 then our Classic GL4 Gear Oil 80W90 will do the trick.

As for warranty claims, your supplier would have to prove in a court of law that your lubricant directly gave rise to any problems. As long as you use a lube that is compatible with copper and its alloys then copper leaching cannot arise. Equally any reputable lubricant company (including ourselves) will provide expert witnesses to counter any claim that the lubricant was at fault PROVIDED you can prove you have used the spec recommended by that lubricant company for your application.

Hope this helps.

Best Regards

Peter
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Barnyzuki
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PostPosted: Sat Mar 24, 2007 10:31 am    Post subject: Reply with quote

Cheers for the replies, I asked the gearbox repair man why I should use engine oil, he said the same thing about synchro rings and was worried about cold performance of gear oil.

I have just ordered 5 litres of evo 2 gear oil via the web store, thank you Peter and Difflock. Cool
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DifflockPeter
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PostPosted: Sat Mar 24, 2007 11:03 am    Post subject: Reply with quote

Cheers Barny,

Many thanks for supporting us with your order.

You won't have to worry about the performance of Evo 2 on cold winter mornings, it's formulated not to thicken up when cold.

Best Regards

Peter
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thingy
Gate Opener


Joined: 01 Feb 2009
Odometer: 1




PostPosted: Sun Feb 01, 2009 1:55 am    Post subject: My Trans specialist said ALWAYS use a 0W engine oil........ Reply with quote

I have to say, I was sceptical. In the Gold Coast, Australia I had an MR2 GT with farked-up syncro's, they were grinding bad in 2nd and a bit in 3rd.

He (Grant at Trade Transmissions) could have ripped me. Instead he said rather than me fitting new syncros I will just change the oil to a 0W oil and it should be fine. He said if all cars did this you would never get slipping sycros and other probs.

Sure enough, the box felt tighter and does not grind even when cold.

I now have an issue in New ZEaland with a Mitsubishi Pajero Differential which is making a metalic sandy hiss (deff not wheel bearing) and I am contemplating doing the same thing as I have an identical car which does the same thing but is not as bad. Maybe 0W mobil will do the trick here too.?!?

__________________________________
CTR
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stonebasher
Gate Opener


Joined: 31 Mar 2013
Odometer: 2




PostPosted: Sun Mar 31, 2013 1:13 pm    Post subject: gear box Reply with quote

i have a isizu tf the also takes engine oil as well i also put a bit of lucas oil stabaliser in as well. i had put gl4 fully sinthetic oil on the previous gear box for about 2 years and i killed the last gearbox so i was more careful when i installed this one.
but its a second hand unit and i makes a slight grinding noise in 4th gear underload between 2000 and 2500 reves and pops out underloads as well. i think a lube problem i have fill it throught the transfur box which is conected so its above the filling hole slightly but to no effect, is this somthing that is going to get worse and destroy the gearbox again or shall i get it refurbed.
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scrunt
Articulating


Joined: 11 Jul 2012
Odometer: 985
Location: Tayside.



PostPosted: Sun Mar 31, 2013 4:02 pm    Post subject: Reply with quote

Welcome to Difflock.

Great thread revival there.
5 years from the last post and a 7 year old OP.

Hopefully someone will be along within the next few years with some good advice.

george
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stonebasher
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Joined: 31 Mar 2013
Odometer: 2




PostPosted: Sun Mar 31, 2013 4:07 pm    Post subject: oil and lube Reply with quote

its a bit of a long shot will do a new topic if there is no reply but if the people are still members i will still notify in there emails i gues.
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