From what I read on this the usual culprits are the solenoid (gets gummed up with oil sludge), cam position sensor, or the cam timing is actually off. I've no hands on experience (yet) with this one, but will be troubleshooting mine over the next few days. I just looked at PNP's website, a cam posit...

Thanks man. I cleaned up the viscous coupling but didn't see any obvious leaks at the diff. I'm going to let it ride a while and reinspect that one. The front CV joint on the prop shaft was the one that was "a little dry" (think slightly wet graphite). I re-packed it with some generic CV g...

(driveline disconnected at the top of the picture, wet spot at the bottom near the diff. Sorry)

Howdy everyone, I've been asking around the GRM forum but I think a deeper knowledge base is needed. You guys came highly recommended, so here goes: I'm working on my neighbors 1999 Volvo V70 XC (autotragic). They've been having a rash of driveline related issues that's lead to a replacement of both...