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After extensive time and parts power steering is intermittently hard. Replaced rack due to fluid in dust boots. Bled system and ever since intermittent or no power assist. Tried another rack and two p

Using Dexron III fluid which is recommended. After 2 racks and 2 pumps thought problem was fixed. Road test was good at first but slowing down and turning at about 40 mph no assist. I am a journeyman tech with almost 40 years experience but am not sure where to go now.

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I am a good tech also.. 40+years.. I am retired and only work on my cars and poor people cars who cannot afford to have them repaired. (for parts cost only) I had a similar problem with a master cylinder.. Could not get it to make pressure.. after 3 "rebuilt" cylinders and about 1 gal of fluid.. i finally took one of the "rebuilt" cylinders apart. one of the seals on the piston was not installed it was there just not around the piston.. drove me crazy.. took a second one apart and same problem.. this was one of the biggest reman companies in the US and i always use their parts.. I was very dissapointed with their quality on this part. Had another issue with a rack and Pinon.(mitsubushi car) Steering was going bad slowly Harder and harder to steer.. I replaced the pump.. did not fix the problem.. customer drove car for another week.. pump locked up and broke the belt.. car not running the pump was turning free.. This person had NO money.. so i went to pick a part and found a rebuilt rack that looked like it had just been installed ( same Manufacture as in ill fated MC ) I took it and installed it.. cured the problem.. very little cost.. the rack has a valve that allows right or left assist depending on the position of the shaft.. one of these valves had been going bad slowley..and finally failed.
Hope this helps.or at least sets you on the right course..

Posted on Dec 01, 2014

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SOURCE: NEW RACK & PUMP: Steering is still hard at slow speeds. Why?

If the belt is slipping it would do even more so at higher rpms. Plus it would be harder to tell if it is slipping at high speeds due to the fact that just about all rack and pinion systems steer easier at high speeds.
My best guess would be air in either the lines or pump. Driving will not remove the air as it is a sealed system.

Posted on Jul 08, 2013

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1 Answer

NEW RACK & PUMP: Steering is still hard at slow speeds. Why?


If the belt is slipping it would do even more so at higher rpms. Plus it would be harder to tell if it is slipping at high speeds due to the fact that just about all rack and pinion systems steer easier at high speeds.
My best guess would be air in either the lines or pump. Driving will not remove the air as it is a sealed system.

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