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#4668083 - 02/16/18 05:41 PM Dex VI in heavy truck steering?
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
TRW calls for TES389/TES295 fluid for their THP 60 steering box. Truck is a 2006 Freightliner M2
https://www.trwaftermarket.com/globalass...1-june-2016.pdf

I am currently using Mobil Multi Vehicle ATF
https://mobiloil.com/en/automatic-transmission-fluid/multi-vehicle-atf
It meets Dex III, which is what was originally specified for this box

Mobil Dex VI does not list TES389 as a spec it meets.
https://mobiloil.com/en/automatic-transmission-fluid/dexron-vi-atf

Can Dex VI be used? Is it any way superior to the Multi Vehicle ATF, which is also a synthetic blend? Is there an issue with viton seal compatibility?
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.

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#4668269 - 02/16/18 08:38 PM Re: Dex VI in heavy truck steering? [Re: George7941]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1726
Loc: Alberta
Mobil Delvac 1 ATF meets these specs. Just google TES 295.


Edited by Snagglefoot (02/16/18 08:39 PM)

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#4668313 - 02/16/18 09:39 PM Re: Dex VI in heavy truck steering? [Re: George7941]
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
Yes, I am well aware of that and that is what I use in Allison transmissions. My question was specifically about Dex VI. I was looking for less expensive alternatives to the Mobil Delvac 1 ATF since the power steering system is a less severe environment than an auto tranny. Is Dex VI better than the Mobil Multi Vehicle ATF that I am currently using?
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.

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#4668389 - 02/17/18 12:01 AM Re: Dex VI in heavy truck steering? [Re: George7941]
clinebarger Offline


Registered: 12/19/13
Posts: 1912
Loc: Fort Worth, Texas
You can run a Dexron/Mercon with a Allison C-4 approval (C-4 & TES-389 are basically the same spec).
_________________________
2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4668394 - 02/17/18 12:13 AM Re: Dex VI in heavy truck steering? [Re: George7941]
PiperOne Offline


Registered: 10/25/17
Posts: 184
Loc: A Highway Near You
You might get away with it in a TRW box (never use ATF in a Sheppard)...but I'd stick with the Delvac 1 ATF...it's not like you change it often or it's a big sump. IMO...Dex VI is too thin for a big steering box.
_________________________
HDEO in Diesel Engines. No spark plugs here.

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#4668490 - 02/17/18 07:11 AM Re: Dex VI in heavy truck steering? [Re: George7941]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1726
Loc: Alberta
According to Mobil, Mobil Muli Vehile ATF is not a replacement for Dex 6, just Dex 3 and some other manufacturer’s recommended ATF. Sort of muddles up the logic of all this.

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#4670523 - 02/19/18 07:42 AM Re: Dex VI in heavy truck steering? [Re: George7941]
meep Offline


Registered: 02/20/07
Posts: 3556
Loc: Southeast
Agreed with Piper - Dex VI is a little thinner - I don't think I'd use it here.
_________________________
2018 F150
2015 crv (wifey!)
2009 s60 2.5T

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