Transmission oil

[Cousin]

I know, this has been done to death, but I want a fresh take on this issue
Picked up my Multi today, driving nice and smooth again after my second auto rebuild
I noticed on the rebuild guarantee they recommend 'servicing' the auto every 12 months or 20,000 ks
Now I do around 60,000 a year, so it got me wondering if there is any advantage in changing my oil more than the once a year I have been doing
The clutches went in the box this time, and was wondering if changing my oil 2 or 3 times a year might give me a better life than the 96,000 ks I got out of the first rebuild
I know some will look at the costings of changing the oil, but I look at the disruption to the running of my business, and it has cost me far more than 2 or 3 oil changes in a year
I'm more than happy to spend a bit more money for better reliability
Thoughts? or definitives?



M

[Transporter]

I would do it yearly in your case or every 45,000km if you must. I would also fit the temperature gauge. The hi speed driving on hot days is a killer.

On the second thought. Is the 20,000km oil change only recommendation or the condition of the warranty?

[Cousin]

Warranty is only good for 20,000 so after that doesn't matter
What good would an oil gauge do, apart from telling you to stop (I know, dumb question/statement!)
I've found the more gauges you have, the more you worry, and usually for no real reason
Is an additional oil cooler worth considering?
I was advised not to worry in this model as the existing one is ok...?
I'm open to suggestions



M

[Transporter]

The oil temperature gauge would alert you when the AT is running hot, so you just slow down and let it cool down.

[Umai Naa!!]

Is there any particualr temperature range that is ideal for them?

More importantly, at what temperature does one consider pulling over to let it cool down?

[Rebuild]

The transmission shop only wants your money every 20000km IMO.
50K sounds more reasonable to me,but also depends how they're driven

When i did mine at 75K the oil looked reasonably ok.Next service(DIY) at 150K

[Transporter]

Is there any particualr temperature range that is ideal for them?

More importantly, at what temperature does one consider pulling over to let it cool down?

The ATF will oxidize and turn brown when heated up over it's mormal operating temperature.
Generally the 80-90 degC is normal temp for ATF, when it goes around the 120 degC it is real bad. Trouble with the AT is that even under the normal driving the AT can overheat. Also for every 10degC over the normal oil temperature the life of the ATF fluid (any oil really) is reduced by 1/2. .

[Guest001]

Well normally it means 20000k or 1 year WHICHEVER COMES FIRST

I have just done the 15000k first service after 12 months but car had only done 8000km
It says the above in the book as far as I know