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Pump or steering box failure


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My 92 3.9 v8 R/R has partially lost its PAS. When turning initially there is no assistance, yet when movement has been initiated on the wheel there is some assistance, albeit very jerky. I am have replaced and tighten the PAS drivebelt, to no avail (although when I had this problem in the past it was a slipping belt). Is this likely to be the pump or the belt?

Any suggestion, greatly appreciated!


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More likely a low fluid level allowing air into the system -you don't mention you have checked this...

Top it up and with the wheels jacked off the ground turn from lock to lock a few times to get the air out the system, then re-try it under load.

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