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Dex VI in heavy truck steering? #4668083
02/16/18 06:41 PM
02/16/18 06:41 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
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.
Re: Dex VI in heavy truck steering? [Re: George7941] #4668269
02/16/18 09:38 PM
02/16/18 09:38 PM
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
Mobil Delvac 1 ATF meets these specs. Just google TES 295.

Last edited by Snagglefoot; 02/16/18 09:39 PM.

If you want the job done right......do it yourself.
Re: Dex VI in heavy truck steering? [Re: George7941] #4668313
02/16/18 10:39 PM
02/16/18 10:39 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
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.
Re: Dex VI in heavy truck steering? [Re: George7941] #4668389
02/17/18 01:01 AM
02/17/18 01:01 AM
Joined: Dec 2013
Posts: 2,170
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,170
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
Re: Dex VI in heavy truck steering? [Re: George7941] #4668394
02/17/18 01:13 AM
02/17/18 01:13 AM
Joined: Oct 2017
Posts: 201
A Highway Near You
PiperOne Offline
PiperOne  Offline
Joined: Oct 2017
Posts: 201
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.
Re: Dex VI in heavy truck steering? [Re: George7941] #4668490
02/17/18 08:11 AM
02/17/18 08:11 AM
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
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.


If you want the job done right......do it yourself.
Re: Dex VI in heavy truck steering? [Re: George7941] #4670523
02/19/18 08:42 AM
02/19/18 08:42 AM
Joined: Feb 2007
Posts: 3,640
Southeast
meep Offline
meep  Offline
Joined: Feb 2007
Posts: 3,640
Southeast
Agreed with Piper - Dex VI is a little thinner - I don't think I'd use it here.


2018 F150
2015 crv (wifey!)

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