Haldex? 2016 xc70 Topic is solved

rangema · Post by **rangema** » 31 Oct 2025, 13:36

Hi all, I am hoping somebody may have had this problem and knows what it is.
With full steering lock, accelerating slowly, there is a low rumble sound seeming to come from the rear end. Does not happen when not accelerating, Does not happen when the weather is cold, 32 farenheight, until the car warms up. Does not happen whien steering at a less tight steering angle or normal driving. Could it be the differential not unlocking? or the Haldex pump?
Many thanks
Marc
2016 XC 70

Post by **matthew1** » 31 Oct 2025, 16:04

I would expect a bump feel from the inside wheel if it's not unlocking, beyond just a sound.

rangema · Post by **rangema** » 01 Nov 2025, 10:25

matthew1 wrote: ↑31 Oct 2025, 16:04 I would expect a bump feel from the inside wheel if it's not unlocking, beyond just a sound.

Changed over to winter tires this morning and could see no problems, the rear wheels are free to rotate so You are right.
I discoonnected the awd module fuse #29 in glove box and all vibrations and bumps ceased. Haldex pump??
Cheers
Marc

Post by **matthew1** » 01 Nov 2025, 10:38

Hm. Or this...