Concerning the thinner (more shear stable) Dex VI and Toyota WS auto transmission fluids....., has there been testing or studies performed to determine how long a late-model transmission will last compared to those that use more viscous fluids (which tended to shear more)?
Transmission Longevity With Dex VI and Toyota WS
- Thread starter 147_Grain
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Over on the club lexus forum a guy sent his 80,000 mile WS fluid to Blackstone and it needed changing. Was lsoing viscosity at that point. I did my wifes Lexus at 82k miles.
I wouldn't. Go pass 50k on them fluids. Amsoil has some of the best fluid for long tranny runs
MolaKule
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Originally Posted By: 147_Grain
Concerning the thinner (more shear stable) Dex VI and Toyota WS auto transmission fluids....., has there been testing or studies performed to determine how long a late-model transmission will last compared to those that use more viscous fluids (which tended to shear more)?
I have many papers on transmission fluid and AT transmissions and all tests show better performance over more shifting cycles with the modern LV fluids than with the older higher viscosity fluids.
There is no formula as to how much longer they would be in service without failure since there are so many variables.
Concerning the thinner (more shear stable) Dex VI and Toyota WS auto transmission fluids....., has there been testing or studies performed to determine how long a late-model transmission will last compared to those that use more viscous fluids (which tended to shear more)?
I have many papers on transmission fluid and AT transmissions and all tests show better performance over more shifting cycles with the modern LV fluids than with the older higher viscosity fluids.
There is no formula as to how much longer they would be in service without failure since there are so many variables.
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Originally Posted By: MolaKule
....all tests show better performance over more shifting cycles with the modern LV fluids than with the older higher viscosity fluids.
That is exactly what I was hoping to hear.
Do we also know if the LV ATF's will adequately protect the heavier bearings in auto transmissions?
Trust that LV ATF's will result in lower transmission fluid temps in a similar manner as lighter high-quality engine oils do.
....all tests show better performance over more shifting cycles with the modern LV fluids than with the older higher viscosity fluids.
That is exactly what I was hoping to hear.
Do we also know if the LV ATF's will adequately protect the heavier bearings in auto transmissions?
Trust that LV ATF's will result in lower transmission fluid temps in a similar manner as lighter high-quality engine oils do.
MolaKule
Staff member
Quote:
Do we also know if the LV ATF's will adequately protect the heavier bearings in auto transmissions?
The phosphorus, Boron, and the other specialized AW's in the addpack do a good job of preventing wear. Keping the fluid clean and changing withing 50k or less keeps the additives fresh.
If you pull any loads, then an oil cooler ahead of the radiator is a good thing to have, since extended temps are what kills ATs.
Do we also know if the LV ATF's will adequately protect the heavier bearings in auto transmissions?
The phosphorus, Boron, and the other specialized AW's in the addpack do a good job of preventing wear. Keping the fluid clean and changing withing 50k or less keeps the additives fresh.
If you pull any loads, then an oil cooler ahead of the radiator is a good thing to have, since extended temps are what kills ATs.
Dex VI is the best
You mean like double stuff oreos compared to store brand chocolate cookies ?
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