Overheating Auto Gearbox

[downunder Find all posts View Profile Close downunder]

Well on my hilux I added a remote thermostat, to the cooler, so the additional cooler is bypassed untill oil reaches operating temp of 80 deg c. Therefore both issues solved, I will be adding one of those again to the new prado when it gets delivered.

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[vscorsa Member Find all posts View Profile Close vscorsa]

Hi vscorsa, I am going with a PWR cooler, it is actually an engine oil cooler but works very well, in fact better than a transmission oil cooler.

Cheers
Rev

No worries, are you going to fit it yourself?

The PWR products look great and from what I have heard are of excellent quality as well.

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

A10 if you read any of the information from the manufacturers of AT fluid or from the Auto box manufacturers they state that temps over 100 are detrimental to the oil and hence to the life of the box. For every few degrees over 100 the breakdown in the AT fluid becomes more rapid. If I had seen temps of 130 + I would be changing the fluid ASAP. The fact that the ATF warning light comes on at higher temps after the "fix" would seem to be detrimental to the longevity of the transmission. I would love to hear what Toyota think is the ideal operating temp. I have also read that the AT fluid needs to be over a certain temp to work efficiently so fitting an additional cooler in cold climates would not be good. I can not believe that Toyota did not test these cars under towing conditions or on rugged terrain....what were they thinking?????

Ive said it before and I'll say it again. It can't be reading pan temperature. So it is in no way an accurate indication of a/t fluid temp.

[A10 Member Find all posts View Profile Close A10]

Ive said it before and I'll say it again. It can't be reading pan temperature. So it is in no way an accurate indication of a/t fluid temp.

I don't understand why you think the temp measurement is not accurate because it may not be the pan temp.

I assumed the temp measurement was on leaving the transmission mainly based on the speed with which it changes and the high values. Surely if it is the max temp that damages the fluid, the temp should be measured at the hotest location. If the pan temp is used wouldn't the target temp be lower.

[sbclover Member Find all posts View Profile Close sbclover]

Rev ,

What is the pwr part number please.

Sean

[REV Find all posts View Profile Close REV]

Rev ,

What is the pwr part number please.

Sean

I will let you know the part number on Wed -Thu, as thats when I 'm getting the cooler fitted.


Cheers
Lawrie

[REV Find all posts View Profile Close REV]

No worries, are you going to fit it yourself?

The PWR products look great and from what I have heard are of excellent quality as well.

No, there's a young mechanic who is building up his business and comes very highly recommended, so I'm giving him the business.

[Tezza222z Junior Member Find all posts View Profile Close Tezza222z]

[QUOTE=downunder;333168]Well on my hilux I added a remote thermostat, to the cooler, so the additional cooler is bypassed untill oil reaches operating temp of 80 deg c. Therefore both issues solved, I will be adding one of those again to the new prado when it gets delivered.]

This would seem to be the ideal solution Downunder but it should not be necessary...

[REV Find all posts View Profile Close REV]

Rev ,

What is the pwr part number please.

Sean

Ok the cooler is as you already know a PWR and the part number as shown on the carton is; PWO 5929 14 Row 6 cylinder cooler.

Cheers
Rev

[sbclover Member Find all posts View Profile Close sbclover]

Cheers Rev

[vscorsa Member Find all posts View Profile Close vscorsa]

Cheers also Rev, can you please post some photo's once you have it installed?

[REV Find all posts View Profile Close REV]

Cheers also Rev, can you please post some photo's once you have it installed?

I'll have a go, but without removing the grill I doubt that the camera will pick it up as it is not easy to see.

Just a word of warning to those with autos & tow trailers ect.

I mentioned a few of the posts on PP that I have read about the trans' oil being burnt / overheated & so I asked the man to take note of the trans oil.
He has told me that it does have a bit of a burnt odour to it, he very strongly recommends getting the system flushed out, sooner rather than later.

My overheating light has never come on while driving off road, towing or otherwise.

So there you go, weigh up your options carefully, is my advice.

Cheers
Rev

[Tezza222z Junior Member Find all posts View Profile Close Tezza222z]

Can anybody with a ScanGuage and ATF cooler fitted note the temps that their fluid runs at??? Please just for a comparison. I agree with The Roo that the standard system is not good enough for Australian conditions. I think that the Prado has become a soft roader, it is no longer a tough 4X4 unless you spend a lot of dollars to get it there. Not good enough Mr Toyota!!!

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

Can anybody with a ScanGuage and ATF cooler fitted note the temps that their fluid runs at??? Please just for a comparison. I agree with The Roo that the standard system is not good enough for Australian conditions. I think that the Prado has become a soft roader, it is no longer a tough 4X4 unless you spend a lot of dollars to get it there. Not good enough Mr Toyota!!!

the prado was never designed to be a tough 4x4!

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

The Prados are pretty good when it comes to 4wding. Like all good base models, even the 80 series, you need to know what to change on them to bring them up to the Australian 4wding conditions or what you are going to use them for, eg. towing. This means changing the component/-s over to something better, usually in aftermarket terms. In this case it's the oil cooler and it's not a biggie. $200.00 should cover it.
Hope this helps, the Roo.

Exactly. No matter what vehicle you drive you'll have to alter something.

Having to fit a trans cooler is pretty common on many vehicles; especially if towing.