07 XC70 jerky, then drivetrain does not engage, anti-skid light

[abscate]

I’m reading in a nasty failed CV joint from those audio symptoms.

The AWD is then going crazy since it’s detecting huge variations in wheel spin between front and rear?

Best and cheapest , and because the Creator loves Iowa , the most likely

[jonesg]

Is this a P2 thing? On the P80's with either the 2 or 4 bolt lower control arm I can't see how the axle could move outward or load the carrier bearing like this to move.

Neil.

the control arm is bolted to the frame but the other end is only held by the ball joint stud.
if the ball joint is disconnected and the strut is jacked up by jacking under the knuckle , the strut will move outward because it can.
I suspect someone did that in the past with the driveshaft center bolt still in place and pulled the shaft from its fully seated position.

Its better to pull the control arm down than push the knuckle up to seat the ball joint.

[scot850]

I can see that. Just seems strange it has been driving fine and all of a sudden this happens. It is certainly a strange issue.

Neil.

[erikv11]

I’m reading in a nasty failed CV joint from those audio symptoms.

The AWD is then going crazy since it’s detecting huge variations in wheel spin between front and rear?

Best and cheapest , and because the Creator loves Iowa , the most likely

CV seems completely fine by feel, now that the axle is out. It simply disengaged from the trans.

Agreed on the rest, AWD going nuts trying to keep the car going.

[erikv11]

There’s no pothole involved it was going low speed when it failed. At any rate It wasn’t sudden it was gradual, the 1.5 cm of shiny surface at the transmission tells you that. It reached its limit suddenly sure. Pothole or forced-by-mechanic explanations don’t seem plausible.

Don't the CVs have enough lateral play to allow axle tip to back out of trans if there was slippage at the carrier bearing? We've certainly seen driver's side axles (no carrier bearing) backed out.

Also regarding suddenly: would be more accurate to say there was slight intermittent shimmy for a long time - see my earlier post about the peeing axle, it’s this axle viewtopic.php?t=103624.

No way in hell I’d reseat the bearing and use this POS unless under duress lol.

[jonesg]

bearing holds it in alignment, the bearing shifted and allowed enough slack for it to pop out.

same as unbolting the carrier bearing in the prop shaft allows the shaft to disconnect from the angle gear.

[erikv11]

Exactly

[cn90]

This issue has happened before.
In this thread, it is worth reading @jimmy57's post:

Bearing shift on my 3rd autozone passenger cv axle?
viewtopic.php?t=93189

[Krons]

passenger's CV dislodged due to slippage of the half shaft through the carrier bearing.

How many miles on that CV shaft Erik?

[erikv11]

passenger's CV dislodged due to slippage of the half shaft through the carrier bearing.

How many miles on that CV shaft Erik?

PO paid $300 for the part from a Minneapolis Indy shop (Glasgow) so clearly an aftermarket part. Lifespan 08/2018-02/2024 and 124k-186k so:

62k miles
5 years and 6 months