Subaru B9 Trifecta SUV Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter #1
Posted this over on NASIOC - Tribeca forum and have no replies at all, so figured I would join over here and ask also.

Ok, bought my wife a Tribeca to replace her worn out Forester that had gotten to small for the family, and we couldn't afford the Ascent she wanted.

It had mismatched tires on it so scheduled a trip to Tire Rack to get new rubber put on, but found it had a severely bent rim, so ended up with new rims as well.

From day one it had a minor shake in the steering wheel, and after having gone over the front end before we bought it, I just figured it was due to a tire issue because they were worn, so I wasn't worried about it. Putting the new tires on did lessen the shake, and how often it happens, but it is not gone.

Had the front end in the air, checked tie rods, ball joints, all bushings are OK (rear on the lower control arms show wear, but not a worrying amount), steering feels very tight with no slop. I have replaced the front struts in case one was bound slightly (we believe it had hit a curb at one point) and did a normal brake job on the front, new pads and rotors.

Taking it on the road, it will be smooth as glass up to speed. Sometimes taping the break will make the shaking start, sometimes turning will make it start, but it will stay for a while regardless, then just disappear and back to being a very smooth ride. It can happen at 5mph or can happen at highway speeds, and the shaking is always about the same amount.

We did take it into a shop, they checked the alignment and said that was good, they were able to replicate it on a test drive, but were unable to find anything as a smoking gun either.

This. Has. Me. Baffled.

Any ideas on stuff I may have missed?
 

·
Registered
Joined
·
18 Posts
Discussion Starter #3
Maybe. 🤷‍♂️

Bearings feel and sound good when testing and driving. No odd clunks that would lead me to believe it has to do with the CV joints.

Tell me something to check and will let you know if its been tested, or the results if the test.
 

·
Registered
Joined
·
1,744 Posts
Are both CV axles OEM? This is very similar to the issue I had, shake at about 45 mph and again at 65 mph.Cause was a non-oem axle on one side. I was very skeptical, but it was suggested, and I verified one side didn't have the green cups on the axle. Replaced that with a used axle and the shake went away.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #5
Are both CV axles OEM? This is very similar to the issue I had, shake at about 45 mph and again at 65 mph.Cause was a non-oem axle on one side. I was very skeptical, but it was suggested, and I verified one side didn't have the green cups on the axle. Replaced that with a used axle and the shake went away.
I think they are both OEM (thought they were green when I was under it), but will check. Did the shake ever just go away with the non OEM axles?
 

·
Registered
Joined
·
18 Posts
Discussion Starter #7
Not until I replaced it with the used OEM axle.
And that's where I'm having the biggest issue, the shaking will come and go, and doesn't change with speed. Still, everything mentioned here and on NASIOC I will be looking at this weekend.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #8
Sorry, need to update this part.

THINK I found the shake. The rear upper control arm bushings are pretty shot. Not 100% sure that's it, but the only thing I was able to find after spending several hours under it pushing, pulling, shaking, hitting, cranking, and prying on pretty much everything under the car.
 

·
Registered
Joined
·
166 Posts
Another thing to try is cleaning and lubricating the brake caliper slider pins. If the calipers can't move freely they can cause a shake. I experienced this on my Sport Sedan, but it was also accompanied by a long pedal travel.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #10
When I did the front brakes I cleaned and relubed them, that made no difference. I had this issue with my old Supra and it LOVED to eat caliper sliders for some odd reason.
 
1 - 10 of 10 Posts
Top