Ziggy928

I'm new to the site and don't see anything pertaining to the subject, but wanted to know if anyone knew the best POWER STEERING FLUID to use in the 928? Thxs

dr bob

PS fluid is specified as regular Dexron ATF. Avoid the "power steering fluid" bottles and stick with what ZF designed the system for.

Your owners manual lists the various fluids for the car. While "Dexron" is now at least three revisions from when the cars were first built, the current Dexron III/Mercon fluid is backwards-compatible with the original stuff.

Be aware also that the PS fluid reservoir is also the filter, and that's a periodic maiintenance item. They are less than $40 last time I bought one, and a fairly quick item to change. Many PS leaks seem to originate at the hoses that run to the reservoir/filter, so it's a good idea to replace hard or dried out hoses that may be leaking now or shortly after you pour in all that new fluid.

And you just wanted to top off the reservoir a bit...
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Welcome to the group! You'll discover that this is one of the most supportive online communities. Most things you discover on your car have probably been discovered and cured by others ahead of you, so take advantage. I can't imagine owning and maintaining a 928 without the support from the folks here and the dedicated vendors that support us and the list.

Of course, I recommend that you "invest" in Rennlist membership. It's not a requirement, but it does help our hosts keep things fast and convenient. Plus, you'll be able to post pictures and stuff, and add some info to your signature line like the year/model car you are working on.

AO

What Bob said!

the flyin' scotsman

What Bob said and you may as well flush the system WYAI.

Ziggy928

Thanks for the quick reply!--and yes, I thought it was just a 1 minute top-off.

Ziggy928

Bod thanks for the recommendation and I will definitely do as suggested.

Ziggy

linderpat

Thread revival! I have the tell tale leak in the exact spot that all of these power steering reservoir threads refer to (there are many threads on the subject, including Dwayne's excellent write up). The big difference here though, is that all refer to the ATF red fluid puddle - mine is brown/amber like oil? Could there be oil in the reservoir? I checked mine and the fluid is brown/amber. Thoughts?

WallyP

It might be a good idea to flush the system and fix the leak at the same time. The system filter is built into the reservoir, and is pretty much impossible to really clean. Many folks replace the reservoir during the flushing operation. We sell the Power Steering Reservoir, '77-'95, P/N 928.347.015.05, for $23 - call Jeannie at (828) 766-9280 Monday if you need one.

Put a good layer of newspaper under the front of the car.
Disconnect the reservoir clamp, then the hoses. Dump the fluid. Try cutting a small amount of old hose off where it is swollen and soft. Reattach the feed hose to the reservoir. Extend the return hose with a piece of tubing, and stick it in a two-liter soft drink bottle. Briefly hit the starter until the fluid stops coming out. Fill the reservoir and repeat until you get clean fluid out. Clean the area - spray brake cleaner works well. Be careful of fire! Attach the return line and remount the reservoir. Fill the reservoir. Check the fluid level after a few miles.

linderpat

Thanks Wally! Is the fluid color in my reservoir a sign of very old fluid or something else?

WallyP

Could be the type of fluid, could be aged fluid. Some of the new Dexron/Mercon is clearer than the old red fluid. Depends upon the vendor - the red is just an identifying dye.

SharkSkin

Ed, sounds like you have the wrong PS fluid. That could have eaten the seals, leading to the leaks. Also, the oil sender can leak, causing a drip in that same area.

linderpat

well, the oil sender is another project anyway, since I've not had a working guage since I bought the car. So, two projects there. The winter list is growing, but I am thinking winters will be long in my new home here deep in the north-western rockies