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#4508299 - 09/05/17 06:01 PM Castrol Transmax Full Synthetic ATF as PS Fluid
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
All these years I have been using Mobil 1 Full Synthetic ATF in my rack and pinion steering. It eliminated the cold start growl the factory fill GM PS fluid generated.

Apparently this Mobil 1 ATF is being discontinued and I am looking for a replacement and came across Castrol Transmax at a really good price at Costco
https://www.costco.ca/Castrol-Transmax-F....100244081.html
It is a lower viscosity oil, 5.9 cSt at 100C vs 7.4 for Mobil. Will this lower viscosity oil still work well in my truck's steering?
_________________________
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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#4508306 - 09/05/17 06:08 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I've been running Mobil 1 0W-20 in my power steering with great success. You know how those darn Fords love to growl... it's a LOT quieter than with "el Cheapo" power steering fluid
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4508329 - 09/05/17 06:36 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
tig1 Offline


Registered: 01/03/09
Posts: 13655
Loc: Illinois
I get M1 ATF from AAP. I have used M1 ATF since about 1990 and have never had a PS pump failure. Performs very well in xtream temps, hot or cold.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4508340 - 09/05/17 06:58 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 6141
Loc: USA
Castrol Synthetic ATF is very good stuff smile

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#4508432 - 09/05/17 08:23 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
If Mobil 1 ATF gets eliminated, I wonder what Tremec will used as recommendations for a Synthetic ATF on their T-5/45/56's. Conventional ATF is the only fluid besides Mobil 1 that is recommended/approved.
_________________________
----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

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#4508921 - 09/06/17 10:38 AM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
mrdctaylor Offline


Registered: 06/05/03
Posts: 588
Loc: McGregor TX
Whoa. Where did you hear that Mobil 1 ATF is being eliminated? Is that confirmed?
_________________________
02 Tacoma 3.4L, 215K, Magnatec 10W30
02 Trailblazer 4.2L, 174K, Magnatec 5W30
12 Highlander 3.5L, 88K, M1 EP 0W20
17 Escape 2.0L, 31K, Hav ProDS 5W30

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#4509001 - 09/06/17 12:18 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941]
nthach Offline


Registered: 01/02/04
Posts: 3887
Loc: California
M1 ATF is usually my go-to, if that Castrol fluid is anything like MaxLife it should work just fine. I've used both in power steering.

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#4509071 - 09/06/17 01:16 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: tig1]
4WD Offline


Registered: 09/21/10
Posts: 6363
Loc: Texas
The older GM's that towed heavy around here used the M1 - VI is high. I can't hardly find the Castrol anymore (only the Import version) so might have to phase it out ...

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#4509126 - 09/06/17 02:21 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: mrdctaylor]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: mrdctaylor
Whoa. Where did you hear that Mobil 1 ATF is being eliminated? Is that confirmed?


Apparently, this is just a rumor.....

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4508928/Mobil_1_ATF_being_discontinued
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4509398 - 09/06/17 07:26 PM Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: Linctex]
tig1 Offline


Registered: 01/03/09
Posts: 13655
Loc: Illinois
Originally Posted By: Linctex
Originally Posted By: mrdctaylor
Whoa. Where did you hear that Mobil 1 ATF is being eliminated? Is that confirmed?


Apparently, this is just a rumor.....

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4508928/Mobil_1_ATF_being_discontinued


Yes, another BITOG rumor without merit.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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