Six speed N80 Hilux auto trans fluid level

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Six speed N80 Hilux auto trans fluid level

Postby allanj on Tue, 04 May 2021 6:22 +0000

Hi,
Can anyone tell me the correct temperature setting for the fluid level with the no dipstick transmissions.
Have previously done fluid flush & set the level after a short drive to warm things up to operating temperature.
Overfilled the tranny by approx. 500 ml & dropped the level plug until a trickle of fluid & replace the plug. This procedure seems to work fine.
However I would like to be a bit more accurate, don't have a scan gauge & use an infrared digital thermometer which works fine on the pan.
Have checked various web sites, some say 46 degrees c, others say 40 to 45 degrees c & the last was 46 to 56 degrees c.
I have set mine at 53 degrees c at present.
Appreciate any information as to the correct temperature setting. Thank you.
allanj
 
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Re: Six speed N80 Hilux auto trans fluid level

Postby Cure on Wed, 05 May 2021 7:39 +0000

Where did and how set the temperature mate?
Cure
 
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Re: Six speed N80 Hilux auto trans fluid level

Postby martynvella on Thu, 06 May 2021 5:53 +0000

I think your over thinking it.
If it had a dipstick there would be close to a 10mm bit on it which is acceptable.
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Re: Six speed N80 Hilux auto trans fluid level

Postby HK1837 on Thu, 06 May 2021 9:48 +0000

Be careful of non-contact thermometers. You need to know the thermal emissivity of the surface to get the right temperature.
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Re: Six speed N80 Hilux auto trans fluid level

Postby allanj on Fri, 07 May 2021 8:23 +0000

Cure wrote:Where did and how set the temperature mate?

I don't have a scan gauge & didn't use the procedure to bridge data link connector terminals 4 & 13. I use an Infrared Digital Thermometer against the pan which I find works well.
Take vehicle for a short drive to get everything up to temperature. Switch off & wait for trans temperature to drop down to between 35 to 45c ( this could take half an hour ) then with the engine running & trans in park remove the level plug, wait till the fluid starts to trickle & replace plug, all done.
Have now re set mine to 45c. Note if level is set at to low a temperature then it may be overfull when hot also if set at to high a temperature it may be underfill when hot.
Technology has gone crazy on all later vehicles & all to do with making more money for the dealer & doing the DIY guy out of a job. Much simpler on my old 3 liter Hilux Auto with dipstick.
allanj
 
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Re: Six speed N80 Hilux auto trans fluid level

Postby HK1837 on Fri, 07 May 2021 9:55 +0000

What emissivity constant are you using for the pan surface?
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Re: Six speed N80 Hilux auto trans fluid level

Postby Cure on Sat, 08 May 2021 3:13 +0000

thanks allanj
Cure
 
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