So I am having this issue that I hope the all knowing gurus here can help me out with. My 2004 SRX 4.6 AWD is making what sounds like a power steering whine. We also had a lot of oil around the power steering pump. So we replaced the o-ring for the pressure side and replaced the pump. Lets just say that the power steering feels great, doesn't leak and is silent. However the sound has not changed one bit. We were also having an issue with the transmission shifting funny. By funny I mean at low speed it can't seem to make up its mind if it wants to be in 3rd or 4th. Also there is occasionally what I would describe as chatter. If you have ever put a shift kit into your old 3spd auto in an older car to "firm up" the shifts this is what the chatter felt like. Kinda like it would shift 3 or 4 times in rapid succession, each with a fairly hard hit. I am wondering if all of these could be related to the pump or torque convertor. We just made a trip from Seattle to Memphis and it made it ok but I am concerned about our upcoming trip to Texas. Should I just take this to a tranny shop or is there something I can do without dropping the tranny myself? By the way, this thing has 107000ish miles and the trans fluid monitor says I have about 40% life left. Thanks in advance for any help you can offer!
On the first issue: make sure there is enough power steering fluid in the system. If it doesn't leak, it will still whine when it is low. Also, power steering will often stop whining when it warms up and is worst when the vehicle is cold. It could also be one of the pulleys along the accessory belt (e.g. power steering pulley or idler pulley), as their bearings can wear.
On the second issue: I agree, have the transmission oil replaced first. Especially if it has not been done before.