Hi, going up hill, between 40mph and 50mph, my car vibrates a little bit. But when I pass 50mph, it stops vibrating completely.
My car is a Subaru Tribeca with 100k miles.
Any thoughts?
Thanks.
Manual or Automatic? What's the rpm?
Have you also tried to floor it when it vibrates?
Automatic, between 2500 and 3000 rpm, didn't try to floor it.
Try that and see what happens.
I just floor it. The car responded very quickly. The rpm went to 5500. Very fast accelaration. I was afraid of getting a ticket. I didn't notice anything different. I'll try to floor it a few more times to see what happens.
So, it is normal. It needed higher rpm at that gear. I would not worry about it.
Did the vibrations go away assuming you kept the same gear?
If they did, yeah it’s normal. Many cars up shift to early to save gas.
Yes, the vibration go away. Thanks for your answers guys. Good to know it's normal. I wasn't aware that a given automatic transmission could choose a not so appropriate gear, causing a little vibration.
To me it seems like it maybe either normal operation, many cars shake when under load at reasonably right rpm.
or it can be internal transmission wear if it shakes only in a single gear under load.
(On a Dual Clutch Automatic, it can be as simple as having slight clutch slip. But on a regular (“Hydro”) automatic, it maybe be just a sign that the tranny is starting to go out)
if you give me your car model and year, if I’m familiar with it, I’ll maybe be able to check for common tranny faults.
2011 Subaru Tribeca 100k miles
Those are well built gearboxes (5EAT), non of that CVT bs.
As far as your issue, I’ve seen many of them have failure of the differential shaft and this can cause vibration although this shouldn’t happen at this low of a mileage.
Maybe check the flex pipe? I’ve herd some Subaru owners complain about that.
Personally I’d just check my tranny oil (replace it if it’s dark) and use the thing until it breaks cause rebuilding this gearbox costs a fortune anyway.
But first I’d really recommend just finding another Subaru Tribeca owner and checking how this car behaves under the same conditions.
Chances are that’s just how it is on this model.
I would like to talk to others Tribeca owners, but unfortunately the car was a selling fiasco on US and Canada. There are not much of them out there. The one I bought was really well took care of and I love it.
Does it do it only when going uphill?
Are your tyres & front end suspension components all in good shape?
I've noticed it only uphill.
The tires are new, but I'll have to check the front-end suspension components.
Check the CV axles.