Since over 2 years I was looking for a good deal on a brand new PS Pump as it was a bit noisier than normal and you can feel a tad of play in the shaft (with the belt off). Actually Jake told me 2 years ago that my PS Pump is a bit is noisy, that’s how I noticed.
Well lately it was noisier and noisier (especially in the last 2-3 weeks). Took the belt off and span it by hand and I could feel other than the slight play, a bit of grabbing as it was spinning kind of like the shaft was splined.
So I got a new PS pump, spent the Saturday struggling with the PS Pump pulley (I did not have the proper puller and press). Eventually I got it in (all this because the new pump came with no bracket and in order to install the bracket you need to take the pulley off.
So Sunday went for a test drive/hardware store drive and I notice the whine is still there, well, is about 90% there. I was under the impression the whine happens as I pass over 2K RPN (when cold) and 3K RPM when hot. Well turns out the whine is during shifting, starts about 1 second before the shift and fades away about 1 second or so after the shift (total 2-3 seconds). The best description is a PS Pump whine (like steering held at full lock) maybe combined with a whispering hissing whistle.
Is clearly engine speed related as if I release slightly the gas pedal in the moment is going to shift (like you will do as you press the clutch in a manual transmission) the noise is gone instantly.
My first thought was “transmission fluid level”, and unfortunately is fine, but as I was wiping the dipstick to check the level it kind of seem to me the fluid is a bit odd in color.
Well I compared with the fluid from the 1q jug (extra jug after the fluid exchange I did 2 years ago or 45K Miles). Original fluid was red and I found absolutely ZERO derbies after 130K Miles. This is how the fluid looks now, I would say the fluid from transmission is more brown than red.
This is the fluid I used.
Now the noise is pretty noticeable with cold engine and transmission, fades away after the first 3-4 miles as the coolant temperature gets almost to normal operation value. The noise can be heard at any shift (up but not down) regardless of the gear. The transmission feels and behaves normal, but I think this is the calm before the storm. Is true, perhaps you need to be familiar with the car to hear it. The noise can not be pinpointed (not while driving) but you have the impression if coming from the right side. I would say that is because is coming trough the HVAC ducting and that’s about the place where is coming from.
The plan is to get to a transmission shop for a professional opinion as I know very little about automatic transmissions, just have the general idea of how is working but not enough to think of a possible cause. I am just thinking the fluid pressure goes up during shifting and that’s why I have the noise but is just a wild guess.
Unfortunately unless it sits for few good hours, is not going to make the noise, then I was planning to drop the pan and check for derbies and change the fluid. I know that changing the fluid won’t fix the mechanical failure, but I have to drop the pan anyway.
Maeng9981’s thread keeps ringing in my ear…bummer!
Any suggestions, opinions?
Well lately it was noisier and noisier (especially in the last 2-3 weeks). Took the belt off and span it by hand and I could feel other than the slight play, a bit of grabbing as it was spinning kind of like the shaft was splined.
So I got a new PS pump, spent the Saturday struggling with the PS Pump pulley (I did not have the proper puller and press). Eventually I got it in (all this because the new pump came with no bracket and in order to install the bracket you need to take the pulley off.
So Sunday went for a test drive/hardware store drive and I notice the whine is still there, well, is about 90% there. I was under the impression the whine happens as I pass over 2K RPN (when cold) and 3K RPM when hot. Well turns out the whine is during shifting, starts about 1 second before the shift and fades away about 1 second or so after the shift (total 2-3 seconds). The best description is a PS Pump whine (like steering held at full lock) maybe combined with a whispering hissing whistle.
Is clearly engine speed related as if I release slightly the gas pedal in the moment is going to shift (like you will do as you press the clutch in a manual transmission) the noise is gone instantly.
My first thought was “transmission fluid level”, and unfortunately is fine, but as I was wiping the dipstick to check the level it kind of seem to me the fluid is a bit odd in color.
Well I compared with the fluid from the 1q jug (extra jug after the fluid exchange I did 2 years ago or 45K Miles). Original fluid was red and I found absolutely ZERO derbies after 130K Miles. This is how the fluid looks now, I would say the fluid from transmission is more brown than red.
This is the fluid I used.
Now the noise is pretty noticeable with cold engine and transmission, fades away after the first 3-4 miles as the coolant temperature gets almost to normal operation value. The noise can be heard at any shift (up but not down) regardless of the gear. The transmission feels and behaves normal, but I think this is the calm before the storm. Is true, perhaps you need to be familiar with the car to hear it. The noise can not be pinpointed (not while driving) but you have the impression if coming from the right side. I would say that is because is coming trough the HVAC ducting and that’s about the place where is coming from.
The plan is to get to a transmission shop for a professional opinion as I know very little about automatic transmissions, just have the general idea of how is working but not enough to think of a possible cause. I am just thinking the fluid pressure goes up during shifting and that’s why I have the noise but is just a wild guess.
Unfortunately unless it sits for few good hours, is not going to make the noise, then I was planning to drop the pan and check for derbies and change the fluid. I know that changing the fluid won’t fix the mechanical failure, but I have to drop the pan anyway.
Maeng9981’s thread keeps ringing in my ear…bummer!
Any suggestions, opinions?