2005 Grand Caravan，13万公里。半年前起出现呜呜的叫声，好象都是在比较冷的天气出现。启动不走，慢速或高速都有，好象转方向盘时声音大些。
我在网上找了找，觉得叫声可能是power steering resevoir的问题，好象是里面的一个screen有问题。
有 一个人是这个情况：My '06 Grand Caravan makes a whirring kind of whining noise. It changes pitch when gears shift and I can hear it on the highway, around town as well as when idling. It happens when engine is warm but outside temp is cool. Dealer said he has 2 that do this and it has something to do with battery re-charging. My reliable mechanic has agreed. No one has offered a solution to this very annoying situation.
This problem is fixed! It was actually caused by the power-steering. Having the fluid drained and system flushed has resolved the noise problem.
另外有个youtube: https://www.youtube.com/watch?v=yL6YcHkyEmY, 叫声和我的车一样，换了power steering resevoir就好了。
今天去dealer查了一下（$６０），没有告诉我车为什么叫（我猜想他们可能也不能确定），只给我列了一个要修的单子：
rack and pinion gear leaking (tie rods loose) = 1259.00
allignment= 69.95
power steering resevoir leak= 159.00
power steering flush= 99.99
front struts/mounts/bearings/blots cost=1098.00
front pads and rotors (rotors pitted bad/ 7mm pads)= 349.00
rear pads and rotors (pads 2mm/ rotors pitted)= 389.00
brake flush= 119.99
oil pan gaskets leaking= 269.00
这车一直在dealer哪做保养，前一次是１０个月前（１０万公里），没什么问题。现在哪都 leaking，有点奇怪，车库地上没有星点油。机油也没少。今天从dealer哪一出来我就停在停车场查了一下PS fluid,在“ADD"标志上方的两个刻度之间，应该是不少的。（谢天谢地的是我好在看了一下，power steering resevoir的盖了只是放在上面，没扣上，我要是直接开回家，路上一颠，这盖子没准就掉路上了。）
我的问题是:
是不是他们不是很确定车叫的原因，就把最有可能的几个东西都换掉。我想先换掉power steering resevoir。单子上列的其它东西，哪些是必须的。哪些可缓一下。
