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No, not yet. Sorry.

It don’t have experience with this, but it sounds like a wiring issue. I’d test for continuity before replacing parts.

I'm not up to speed on when facelifts occurred for the rwd Volvos, but this was a May 1984 760 with PRV engine, so from what you've said I would think pre facelift. 4 bolts sounds like a good improvement - this was harder than it had to be. It's even easier on the v70 p80 cars (not sure about 850s) - disconnect the wheel arch lining and then 2 bumper to chassis bolts (one each side) and you're done (ignoring possible fog light wiring).

From memory there's just a couple screws on the plastic surround at the top (unscrewing downwards) holding it in place, and then it just pulls out. A bone/trim tool can be used to pop the lip at the bottom. The plugs in the back may need to be disconnected or they're secured to the dash and disconnect automatically when cluster is pulled forward. I may make a video of that if I find time.

Completely agree! Very simple process overall. Glad you found the video helpful :)

I find watching a video helps me a lot with some tasks, saves a lot of time finding bolts. I'm glad you found it useful!

There's a reverse lockout. its to stop the rear wheels driving the prop shaft and to I think helps prevent damage to the grearbox. Mostly applicable under hard braking.

@@aralez3061 thanks. I already welded viscous coupling and freewheel together, and now I have full time AWD. And no problems or damage to gearbox. Also I strengthen the gearbox and bevel gear connecting point.

⁠@@Kriststtyou have any picture of how everything is done? How did you strengthen the gearbox?

i can't help with the electrical issues - maybe just fire the parts cannon at it? Regarding radio - if the battery is disconnected you need to enter a 4-digit pin to 'unlock' the radio. This is an anti theft feature. Regarding the 4wd system - jack up all 4 wheels and see if they spin when it's in gear. If the rear wheels don't spin the system is damaged. Regarding Haldex system - Haldex was introduced in 2003. I don't know which month or VIN # the change happened at. If your car is a 2000 it will have a Viscous Coupling (VC) like this. Hope this helped answer your questions :)

No, it is a sealed unit.

@@aralez3061 yes, but how about drilling a hole with a drill and replacing the oil? Then we can cover it with a bolt

@@aralez3061 th-cam.com/video/8nDn1rqL_3Y/w-d-xo.html

@@turgutakdogan15 I guess that could work, but draining the cooked oil my be painful - my understanding is it's quite sludgy.

@@aralez3061 It's a mixothixotropic fluid, not really an "oil."

Glad it was helpful! Thankyou for the feedback :)

And model, I’m trying to find this exact viscous coupling for my build.

@@eddiealonso6650 This one came from a 2001 P2 XC70.

Pretty sure it's 9463313.

@@aralez3061 the question is where to get such part...

@@sebastianciupinski8973 I don't know if Volvo still make them, but they can be found in any awd Volvo pre 2003, when the haldex system was introduced.

Under conditions where torque is shared on both sides but at different levels itll allow slip. But he wont be able to spin it hard enough or fast enough by hand to make that happen. If he can make them slip by hand its def blown

Prelude Dude is right. The torque I can apply isn't enough to overcome any initial friction in the unit. I believe it also works by heating up (to a point) as it slips, and changing into a thicker state, where it then grips, and cools. As it cools more slip is allowed. This cycle goes back and forth. The coupling also accounts for differences in turning radius between the front and rear tyres, the same way a diff does between left and right.

@@aralez3061 Initial friction? But if it does not allow differential movement not even when stone cold, once you force it to rotate independently then it will get even harder by getting warmer. Even when the fluid is cold it never functions as an open differential. It seems that it always places stress on the driveline in normal city driving with a lot of turns.

@@PrimalMiltos By initial friction I mean the friction that is created when the shaft starts trying to turn. From what I have read and various volvo adverts there is meant to be 5% of torque going through the shaft under normal driving conditions, to decrease response time.

@@aralez3061 Now it makes sense. It's always engaged ever so slightly. They say for example the Express van has 35%-65% F-R torque distribution. Which explains why there is no delay see one here: th-cam.com/video/JQdroEnlv6I/w-d-xo.html

As far as I'm aware they can't be rebuilt, and are a fully sealed unit. Opening it would destroy it. How do you know it binds up?