Power Steering Stumble
#1
Power Steering Stumble
One thing I've come to notice on my 05 STR is that at a stop or very slow speeds sometimes when I turn the steering wheel quickly on a surface that's a bit rough like say pavers the steering seems to be underpowered and the wheel stumbles a bit in my hands as though there's not enough power coming out of the hydraulic pump to overcome the resitance of the surface.
It's not really a bad issue but I was a bit surprised.
Is this normal?
Bob S.
It's not really a bad issue but I was a bit surprised.
Is this normal?
Bob S.
#2
#4
I'm not having any noise issues
Bob S. be sure to read the whole thread! https://www.jaguarforums.com/forum/s...+pump+additive
Thanks for posting this but ...
This is not what I have described. I'm getting no noise that I've noticed. It's a definite shudder one can feel.
I did read through the the 3 TSBs and there are 3 distinct issues. The big one involves a partial rebuild of the rack with a 4 hour allowance for the job. Sure ... I think it will take longer than that out of warranty.
But now I'm informed so I can discuss this with the dealer. Mine seems like the idle is too low to support the load put on the pump and with not enough pressure being produced by the pump you can feel the shudder transmited from the rack right up through the column and to the wheel.
It does demonstrate that the rack isn't an over boosted, no feeling type of steering which is a good thing!
It looks like they reccomend using Mobil 1 synthetic ATF after a rebuild. That's probably for heat related issues and the additive is for de-gumming the broken down fluid that was in there. I'd be tempted to flush the system both before and after their magic elixer has had it's effect to make sure there's none of that old stuff in there. I wonder if it's one of BG's products?
I think I'll flush mine ASAP to preven this noise from showing up.
But ... I saw no mention about feeling a shudder in the column.
Bob S.
#5
#6
Ah hah! Thanks for mentioning that.
Well I read all these threads at a very early hour this am so I may have missed it but honestly, it wasn't very prevalent in ANY of the postings or the TSBs. I heard a lot about noises though. This am I will look for a sticker on the reservoir for evidence of already having been treated.
If the seal really is binding that much to cause a shudder it won't be long before it fails so I best get right on this.
Did you switch to a particular brand or synthetic PS fluid?
I use one made by Redline in my race car due to heat issues.
I also wonder if the proceedure quoted in one of the threads as being over $200 for putting the additive in also included a complete power flush of the steering hydraulic circuit?
That might make sense if it prevents the R&R of the rack for a rebuild as outlined in one of the TSBs. That will be a lot more than $200.
Bob S.
Well I read all these threads at a very early hour this am so I may have missed it but honestly, it wasn't very prevalent in ANY of the postings or the TSBs. I heard a lot about noises though. This am I will look for a sticker on the reservoir for evidence of already having been treated.
If the seal really is binding that much to cause a shudder it won't be long before it fails so I best get right on this.
Did you switch to a particular brand or synthetic PS fluid?
I use one made by Redline in my race car due to heat issues.
I also wonder if the proceedure quoted in one of the threads as being over $200 for putting the additive in also included a complete power flush of the steering hydraulic circuit?
That might make sense if it prevents the R&R of the rack for a rebuild as outlined in one of the TSBs. That will be a lot more than $200.
Bob S.
#7
Try the additive as I suggested before you go through all of this trouble with rebuilding. According to my Jag master tech and others on this forum its supposed to take care of slight shudders and/or noises. May be as simple as that, and you know if you're out of warranty, even if they agree to do it due to a TSB, you'll still get slammed with some kind of cost. I'd say its a no brainer at 12 bucks.
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#9
One thing I've come to notice on my 05 STR is that at a stop or very slow speeds sometimes when I turn the steering wheel quickly on a surface that's a bit rough like say pavers the steering seems to be underpowered and the wheel stumbles a bit in my hands as though there's not enough power coming out of the hydraulic pump to overcome the resitance of the surface.
It's not really a bad issue but I was a bit surprised.
Is this normal?
Bob S.
It's not really a bad issue but I was a bit surprised.
Is this normal?
Bob S.
#11
I mentioned my results in the before the warranty expires thread.
It's been at least 3 maybe 4 weeks and about 1 tank of gas or 300 miles since they added the magic elixir.
The noise was immediately reduced. It hasn't gotten any better since that time.
I still have a noise. Sigh ...
I noticed an instant improvement in the bump steer effect I was getting but I still need to go in for an alignment adjustment. I think it may need a bit more toe-in.
I haven't noticed the steering judder of late but I can't say it's gone either. I'll try and stay alert. I am going for a bit of a drive the sh*tty roads that induce bump steer once again so I'll have an update Monday.
It's been at least 3 maybe 4 weeks and about 1 tank of gas or 300 miles since they added the magic elixir.
The noise was immediately reduced. It hasn't gotten any better since that time.
I still have a noise. Sigh ...
I noticed an instant improvement in the bump steer effect I was getting but I still need to go in for an alignment adjustment. I think it may need a bit more toe-in.
I haven't noticed the steering judder of late but I can't say it's gone either. I'll try and stay alert. I am going for a bit of a drive the sh*tty roads that induce bump steer once again so I'll have an update Monday.
#16
#18
#20
I'd have to say that I'm no longer noticing any judder effect at all but I do still have a somewhat quieter squeak.
Another interesting thing is the improvement in chassis tracking. This makes me wonder just what the heck is going on in these steering racks?
My symptoms arrived as follows:
1. Judder at slow speeds.
2. The car begins to not track so well with a lot of bump steer.
3. I begin to get the squeek.
Another interesting thing is the improvement in chassis tracking. This makes me wonder just what the heck is going on in these steering racks?
My symptoms arrived as follows:
1. Judder at slow speeds.
2. The car begins to not track so well with a lot of bump steer.
3. I begin to get the squeek.
I mentioned my results in the before the warranty expires thread.
It's been at least 3 maybe 4 weeks and about 1 tank of gas or 300 miles since they added the magic elixir.
The noise was immediately reduced. It hasn't gotten any better since that time.
I still have a noise. Sigh ...
I noticed an instant improvement in the bump steer effect I was getting but I still need to go in for an alignment adjustment. I think it may need a bit more toe-in.
I haven't noticed the steering judder of late but I can't say it's gone either. I'll try and stay alert. I am going for a bit of a drive the sh*tty roads that induce bump steer once again so I'll have an update Monday.
It's been at least 3 maybe 4 weeks and about 1 tank of gas or 300 miles since they added the magic elixir.
The noise was immediately reduced. It hasn't gotten any better since that time.
I still have a noise. Sigh ...
I noticed an instant improvement in the bump steer effect I was getting but I still need to go in for an alignment adjustment. I think it may need a bit more toe-in.
I haven't noticed the steering judder of late but I can't say it's gone either. I'll try and stay alert. I am going for a bit of a drive the sh*tty roads that induce bump steer once again so I'll have an update Monday.