Correct power steering fluid for C4

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Oct 22, 2006 | 01:33 PM

VinceAD

Thread Starter

Pro

Joined: Mar 2006

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From: Georgia

Correct power steering fluid for C4

My GM service manual refers to a GM fluid for my 91's power steering unit. Since it is the weekend and dealerships are closed I was wondering if anyone knows if these units can use any good dextron III ATF fluid? I noticed the sticky in this forum recommended Valvoline Synpower. Any suggestions? (Also, I am not sure why the fluid is low in the first place).

Thanks!

Oct 22, 2006 | 01:41 PM

bogus

Team Owner

Joined: Aug 2000

Posts: 40,156

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From: San Pedro CA

There is a reason why the Synpower is recommended... and that is because it meets or exceeds the requirements of GM. Get it, you won't be sorry.

As for leaks, you might see fluid on the crossmember. But these racks are prone to leak, either from the rack itself, cracked hoses or from seal failure caused by torn boots.

Oct 22, 2006 | 01:52 PM

JLeatherman

Burning Brakes

Joined: Sep 2006

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From: MD

I think I read in the owner's manual that it uses DexIII. That's what I've been running with no problems yet.

Oct 22, 2006 | 02:00 PM

bogus

Team Owner

Joined: Aug 2000

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From: San Pedro CA

The Synpower has some added conditioners and such that do a great job of quieting a noisy pump.

Oct 22, 2006 | 02:07 PM

HeeHaw89

Drifting

Joined: Jan 2002

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From: Middle River MD

I suck mine out with a baster, then fill with ATF. I do it a few times until it looks clean. No problems.

Oct 22, 2006 | 03:11 PM

VinceAD

Thread Starter

Pro

Joined: Mar 2006

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From: Georgia

Thanks all for the help.

Oct 22, 2006 | 06:36 PM

redrose

Melting Slicks

Joined: Feb 2006

Posts: 2,753

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From: backwoods upstate ny

ATF is NFG for power steering....use power steering fluid only....can't remember where i got that, long ago... i hate to make anything more complex than necessary but the reasons were compelling.