850 Front axle alignment issue Topic is solved

[foggydogg]

Thanks Guys ,

Before doing anything, i will follow Neil's advice and start by changing front sub-frame bushes. One step after the other.

I have numbers tracks to follow. I will begin by the tire pressure this morning and control the rear bushing. As far as i can see, there are "only" 2 bushes on the rear, right ?

Rear bushing.jpg


Thanks really Guys for your help, you are incredible !

Sub-frame bushings do sag with age - no Olde-Guy jokes here, please - so changing them will not be wasted effort.
Robert @rspi just did a short video showing one of the guys at Swedish Auto Parts changing the rear bushings on a GLT, and Robert solved a similar issue on an 850 by replacing the entire rear suspension. Rust issues caused much mayhem.

[manovlov]

Thanks !

Manov

[manovlov]

I followed the advice : Wheels on the back became wheels on the front. But let's see if everyone follow : what did happen to wheels on the front ? You have 5 minutes and i pick up notebooks !

I will test on Monday if there a difference.

[MoVolvos]

I don't understand it.I just had the redone twice.
The report places the values in the good tolerances recommended by Volvo.

Before that operation, i replaced :
- The steering tie rods
- The end tie rods
- The complete shock absorbers except the springs

The TRW wishbones are 2 years old and since this time the car has covered about 1500 kilometers.

I did not take any shock at the front.
When I accelerate, very quickly the car starts to go to the right.


Does anyone have an idea?

Manov



Manov

Currently your problem is not an alignment issue nor tire. Do more work on the suspension as others have suggested.

Did you replace the Strut Bearing assembly?

In the mid 90's when I PDI cars at Acura the Michelin tires had a radial pull problem on the new cars. Swapping the front tires left and right and sometimes a small tweak of the toe usually solved the problem.

Replace the subframe bushing first or just add the inserts before aligning. There is no Castor or Camber adjustments on these cars unless you consider the slight play in the two steering knuckle / front strut bolts which allows for a little camber adjustment an adjustment.

If you still have issues then check the rear suspension.




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[befarrer]

Look up torque steer. https://en.m.wikipedia.org/wiki/Torque_steer

Usually pulls to the right. The main cause is that the left front tire is closer to the drive point on the front axle (transmission differential), the drive shafts slightly twist on hard acceleration, and the left wheel being the shorter driveshaft gets torque first, causing the pull of the steering wheel to the right. Also, my 17" low profile tires cause my V70 to pull all over the road when on uneven pavement or cracked pavement. Put my 15" winter tires on, and it doesn't want to follow ruts and cracks in the road.

[ZionXIX]

You should go to a reputable shop who have the proper alignment equipment.


About alignment....it must be performed ONLY if you replace tie rods.
If you replace shocks,springs,control arms....none of them affects the alignment except tie rods.

I'm replacing both front control arms and ball joints on my xc90. I left the tie rods attached the whole time. I was planning to get an alignment done. Do you really think its not necessary?

[misha]

If you didn't touched adjustment bolt for tie rods....then NO....you don't need an alignment.

I don't know if XC90 have a camber adjustment....850,s,v,c,xc70 up to 2000 don't have that...just toe in and out....and the adjustment is done at outer tie rods adjustment bolt.

[ZionXIX]

If you didn't touched adjustment bolt for tie rods....then NO....you don't need an alignment.

I don't know if XC90 have a camber adjustment....850,s,v,c,xc70 up to 2000 don't have that...just toe in and out....and the adjustment is done at outer tie rods adjustment bolt.

Definitely don't have camber bolts

[misha]

Then no alignment needed.

[befarrer]

If you didn't touched adjustment bolt for tie rods....then NO....you don't need an alignment.

I don't know if XC90 have a camber adjustment....850,s,v,c,xc70 up to 2000 don't have that...just toe in and out....and the adjustment is done at outer tie rods adjustment bolt.

There is some camber adjustability with stock bolts, only way there wouldn't be is if the bolts were pressed in. I can change my camber a bit, not lots, but a couple degrees with stock bolts. Leave the strut Mount bolts loose a half turn, push the wheel in and out when off the ground. The only struts that are not adjustable are the ones where the lower strut fits in the spindle and tightened with a pinch bolt like on my 05 Golf.