Does synthetic oil help reduce power steering and differental noise?

[cardiffman]

I'm wondering if anyone has had any luck using synthetic oils to help reduce the whine coming from Workhorse/Chev Power Steering systems. I have read that some replacement units still make the noise. Mine is annoying, but it works fine. Will a higher grade lubricant make a difference?

Also, I suppose that driveline whine is typical in heavy chassis. Having driven a rear-engine diesel for the past 10 years, I notice a constant whine under acceleration in my Workhorse chassis. I have check and lubed the drive line zerks, etc. and I'm told that the noise is not excessive. I is nearly absent when first starting down the road in the morning, so I'm assuming it may be more noticeable when the lubricant is hot.

Thanks

[KJINTF]

cardiffman

The short answer is "YES" regarding the power steering. I replaced the stock fluid with Royal Purple synth PS fluid which eliminated the noise from the pump.

Check out the Workhorse section there have been a few threads covering these issues in detail

[W4MBG]

i have used lucas power steering treatment in the past. quiets the noise and seals small seal leaks.