Gearbox & Front Differential Oil Change

[mr ben]

Hi guys

lost my workshop manual, has any one got pic of where I drain the gearbox and front differential from and where to fill it up.

Is the gearbox and differential oil the same, any suggestions where to get both

thanks

Mr Ben

[tarquin]

Goodness, where have you been. Robert

Will send a new one. I have your address

David

[mr ben]

Hi David

How are you?

I lost my user name and password and could not get access, but tried again and I am up and running

its been a long time.

IQ coming up to its 40000 service but still going very well no probs at all. a good car I must say

Robert

[Devon Aygo]

Gearbox oil in IQ Manual gearbox is factory filled with 75w gear oil designed to stay in for whole vehicle life, whilst there is no reason not to change the oil if you want to make sure it is fully synthetic 75w mono grade oil.

Fill plug is forwards of and above LH driveshaft on diff case a new gasket will be required and tighten to 39nm

Drain plug is again forwards but below LH driveshaft on diff case a new gasket will be required and tighten to 45nm.

1.0/1.33 manual requires 2.5Lt. API GL-4 SAE 75w

CVT boxes require specialist Toyota CVT oil and filling along with diagnostic computer, not a DIY job.

[tarquin]

Well there you go Robert there is your answer

David

[bobkneale]

Hi I am soon due a 40,000 service that I plan to do it all myself and will be making a list of service items to do myself during this coming summer, after reading the above post re IQ manual gearbox being designed to stay with original oil for full car life, I am wondering what others views are re this ? I believe in regular oil changes and this "sealed for life" idea does not fit in with my idea of what's actually best for the gearbox ?

a) Have I read the above post correctly ?

b) What are the views of other experienced forum members ?

Positive Regards,

Bob.

[mr ben]

Yes David

I must say that I now see that the service book is a inspection of the gearbox oil not to replace it as I thought.

I take it you just need to top it up then? What I am not sure about and maybe Devon aygo could once again help is "front differential" Is it the same oil you use in the front differential as the gearbox and where is the top up point for the front differential or is it the same place as the gearbox point and they fill both the gearbox and the front differential.

In the old days you take the bolt out and stick your finger in the hole and if you could feel oil with your finger then it was up to its wright level. if not then you would use a had pump thing oil filler and top it up.

I note what bob has said about replacing the oil but if you keep the level up to the mark I would think that would do the job

any thoughts anyone

Robert

[craggle]

The diff and gearbox are all in the same place sharing the same oil. It's called a transaxle in the manual so transmission / axle. Only one oil level to check.

Not sure what manufacturers class as "life" when they say "sealed for life" If your car lasts 15 years and does 100k miles then the oil will probably be fine but a car 5 years old that has done 500K miles will be in need of an oil change.

Modern oils will last the 100 odd thousand miles without issue in a gearbox I reckon. There is no form of contamination in a gearbox like there is in an engine from the combustion process so as long as you don't grind the gears together too often the oil will remain clean for a long time.

It wouldn't do any harm to change it though so up to you I guess.

There is a plug in the gearbox at the level of the oil and one at the bottom for the drain. You simply fill the oil or top it up until oil runs out the filler plug hole then screw the plug back in.

Craig.

Here is the page from the 6 speed manual gearbox section. I guess the 5 speed is pretty much identical.

[mr ben]

Thanks Graig

that's what I was thinking. same as the old days.

I would just top it up unless as a woman's been changing the gears, joke !!!!

Has any one got a copy of IQ manual on PDF to send me I got a disk from David but its broken now. there was once a download on the webb but cant access it now

robert

[Soeley]

Goodness, where have you been. Robert

Will send a new one. I have your address

David

[Sally190]

It’s your choice. But all gearboxes produce a small amount of debris, from new, especially as you don’t know how well that box has been treated ( by men or women drivers ).

I note that Toyota does not  recommend renewing that oil, even at the first service (2 years).

If your budget runs to it, change that 2.5L of oil , at 40,000 miles. New washers/gaskets for the plugs should be used, as should the Toyota recommended oil. If you pay a mechanic , make sure that the correct oil and new washers are used.

A faulty gearbox would cost a lot of money to repair/replace compared to the price of renewing that oil.

 

 

[Sally190]

OK. Recently bought an iQ2 manual with just over 21,500 miles on the clock, I decided to have my local Toyota dealer change the gearbox oil. As far as I can make out, this oil also lubricates the front differential.

Now this oil is said to be sealed for life but who knows what treatment that box has had, from its previous two owners.

Now , probably most of you will think that the cost of £65 was wasted, but they also give a visual inspection, which covered items listed on two sides of an A4 sheet. Also a free car wash was offered, which I declined.

Many of you would have done this oil change yourselves, but I’m past working underneath cars; I did my share on an Austin A30 and Morris Minor , in days of yore.

With the new oil, even at such a low mileage, I notice that the changes are smoother.

I wonder if there is a magnet inside that transmission , which has collected bits of metal.

 

[Jikky]

If you need to take out an iq3 driveshaft out,ie,to change the boots,then you will have to drain the gearbox oil first