Power steering fluid (another thread...)
11-22-2016, 05:02 AM
#1
Instructor
Thread Starter
Power steering fluid (another thread...)
Hello,
I know there are several threads regarding this question but they are pretty old and I cannot find a final trustworthy reply, since someone changed/filled up this fluid and had leaks…
My Power steering fluid level is low, in addition it has a terrible colour, I want to change it, the procedure is quite simple but I really don’t know which fluid I’ve to buy in order to avoid any problem.
1990 user’s manual suggested ATF Dextron, in these years Dextron has been developed to Dextron II, III etc…
Which fluid can I buy nowadays?
Thank you
I know there are several threads regarding this question but they are pretty old and I cannot find a final trustworthy reply, since someone changed/filled up this fluid and had leaks…
My Power steering fluid level is low, in addition it has a terrible colour, I want to change it, the procedure is quite simple but I really don’t know which fluid I’ve to buy in order to avoid any problem.
1990 user’s manual suggested ATF Dextron, in these years Dextron has been developed to Dextron II, III etc…
Which fluid can I buy nowadays?
Thank you
11-22-2016, 08:22 AM
#3
Burning Brakes
Originally Posted by Wikipedia
DEXRON-III
In 1993, GM released new Dexron-III fluid (GM Spec GM6417M and later GMN10055). It is generally backward-compatible with transmissions using earlier Dexron fluids or Type-A/Suffix-A fluid. However this specification failed to address a number of issues concerning long term durability such as shear stability and fluid oxidation. Dexron-III underwent a number of iterations in an attempt to address various shortcomings but was eventually replaced by new thinking i.e. DEXRON-VI.
In 1993, GM released new Dexron-III fluid (GM Spec GM6417M and later GMN10055). It is generally backward-compatible with transmissions using earlier Dexron fluids or Type-A/Suffix-A fluid. However this specification failed to address a number of issues concerning long term durability such as shear stability and fluid oxidation. Dexron-III underwent a number of iterations in an attempt to address various shortcomings but was eventually replaced by new thinking i.e. DEXRON-VI.
11-22-2016, 11:49 PM
#7
Rennlist Member
I went with this stuff:
http://lufteknic.myshopify.com/produ...09899203-08971
Quote - "Most early (pre-96) 944, 928, 951, 964 Porsches use ATF (Dexron) as the power steering fluid. It is red in color, and should never under any conditions be mixed with Pentosin CHF11S or CHF202 fluids which are green. Mineral based non-synethtic formula."
Also available here:
http://www.autohausaz.com/pn/0009899203A
http://lufteknic.myshopify.com/produ...09899203-08971
Quote - "Most early (pre-96) 944, 928, 951, 964 Porsches use ATF (Dexron) as the power steering fluid. It is red in color, and should never under any conditions be mixed with Pentosin CHF11S or CHF202 fluids which are green. Mineral based non-synethtic formula."
Also available here:
http://www.autohausaz.com/pn/0009899203A
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11-23-2016, 08:34 AM
#8
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Dexron IID should be readily available online. Plenty of suppliers. Just get plenty of it, as when you start the flush on engine idle it does go through it pretty quickly.
My own fluid flush through last year:
https://rennlist.com/forums/964-foru...l#post12147076
My own fluid flush through last year:
https://rennlist.com/forums/964-foru...l#post12147076
11-24-2016, 04:20 AM
#10
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Yes, and red indeed. You'll need more than 1L though. Theoretically, unless you're planning to work on the steering rack in the future, you'll never need do this again for many many years. Good luck...
01-12-2017, 06:14 PM
#11
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[QUOTE=bb964;13764773]I went with this stuff:
http://lufteknic.myshopify.com/produ...09899203-08971
Quote - "Most early (pre-96) 944, 928, 951, 964 Porsches use ATF (Dexron) as the power steering fluid. It is red in color, and should never under any conditions be mixed with Pentosin CHF11S or CHF202 fluids which are green. Mineral based non-synethtic formula."
BB964, while I agree mixing fluids is never optimal the Porsche TSB linked in the above PDF states plainly:
"ATF fluid and Pentosin CHF 11S fluid can be mixed. In vehicles produced before the above mentioned VIN numbers,
Pentosin CHF 11S fluid can be used to top off the fluid reservoir. "
Unless I am misinterpreting the TSB, I see no problem in using CHF11s or CHF202 which has since preceded it.
http://lufteknic.myshopify.com/produ...09899203-08971
Quote - "Most early (pre-96) 944, 928, 951, 964 Porsches use ATF (Dexron) as the power steering fluid. It is red in color, and should never under any conditions be mixed with Pentosin CHF11S or CHF202 fluids which are green. Mineral based non-synethtic formula."
BB964, while I agree mixing fluids is never optimal the Porsche TSB linked in the above PDF states plainly:
"ATF fluid and Pentosin CHF 11S fluid can be mixed. In vehicles produced before the above mentioned VIN numbers,
Pentosin CHF 11S fluid can be used to top off the fluid reservoir. "
Unless I am misinterpreting the TSB, I see no problem in using CHF11s or CHF202 which has since preceded it.
