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Castrol Transmax Full Synthetic ATF as PS Fluid #4508299
09/05/17 06:01 PM
09/05/17 06:01 PM
Joined: May 2005
Posts: 2,202
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,202
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.
Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4508306
09/05/17 06:08 PM
09/05/17 06:08 PM
Joined: Dec 2016
Posts: 6,259
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,259
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."
Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4508329
09/05/17 06:36 PM
09/05/17 06:36 PM
Joined: Jan 2009
Posts: 13,837
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,837
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 232,000 miles
M1 0-20 EP
2017 Ford Fusion 55K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4508340
09/05/17 06:58 PM
09/05/17 06:58 PM
Joined: Mar 2008
Posts: 6,837
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,837
USA
Castrol Synthetic ATF is very good stuff smile

Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4508432
09/05/17 08:23 PM
09/05/17 08:23 PM
Joined: Sep 2015
Posts: 3,869
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,869
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
Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4508921
09/06/17 10:38 AM
09/06/17 10:38 AM
Joined: Jun 2003
Posts: 628
McGregor TX
mrdctaylor Offline
mrdctaylor  Offline
Joined: Jun 2003
Posts: 628
McGregor TX
Whoa. Where did you hear that Mobil 1 ATF is being eliminated? Is that confirmed?


02 Tacoma 3.4L, 219K, Magnatec 10W30
02 Trailblazer 4.2L, 179K, Edge HM 10W40
12 Highlander 3.5L, 96K, M1 EP 0W20
17 Escape 2.0L, 31K, Hav ProDS 5W30
Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: George7941] #4509001
09/06/17 12:18 PM
09/06/17 12:18 PM
Joined: Jan 2004
Posts: 4,156
California
nthach Online content
nthach  Online Content
Joined: Jan 2004
Posts: 4,156
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.

Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: tig1] #4509071
09/06/17 01:16 PM
09/06/17 01:16 PM
Joined: Sep 2010
Posts: 7,008
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,008
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 ...

Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: mrdctaylor] #4509126
09/06/17 02:21 PM
09/06/17 02:21 PM
Joined: Dec 2016
Posts: 6,259
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,259
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."
Re: Castrol Transmax Full Synthetic ATF as PS Fluid [Re: Linctex] #4509398
09/06/17 07:26 PM
09/06/17 07:26 PM
Joined: Jan 2009
Posts: 13,837
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,837
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 232,000 miles
M1 0-20 EP
2017 Ford Fusion 55K
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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