'02 V70 XC: Rear diff gears vs Haldex pump vs. What's next?

[abscate]

I agree with vti on this, having driven mine when the AWD wasn't working I can attest. Not sure why its such a poor FWD car or what the difference is but they're really awful. A collar and seals are less than $200, at least you don't have a Haldex pump to worry about ($500). You could probably change the sleeve in a day and have your AWD back.

Haldex pump... I just replaced mine, again. And a leaking flange, too. And a driveshaft last spring. Third pump, driveshaft and collar sleeve on this car. Second DEM, second angle gear. AWD is super great in this car, but not that reliable and very expensive to fix.

Sounds like a poster child for FreeCP parts...

[vtl]

Sounds like a poster child for FreeCP parts...

No. I usually don't cheap out on parts, so they last a long time. If I don't lock my money up with FCP, I invest them. In the time it takes a part to fail I get twice the invested money. I.e. I can buy a part again for cash, and still be profitable vs keeping store credits for eternity.

FCP model totally works if you don't make money work, though. But I don't see why you shouldn't.

I bet FCP does something similar

[abscate]

Two Haldex failures over 20 years - that math checks, if you can get aftermarket for half price, thats a better deal. I spend 90% of my spare cash on escorts and blow - the rest, I waste.

[Blacklab467]

I bought my last pump off of FCP, Volvo brand. I've had bad luck with aftermarket pumps both Dorman and Vaico (6 months each). Too much labor to try and save $100 on this type of part. Will FCP warrantee a Volvo brand part? I bought their Haldex service kit with Filter and Fluid last time. I would maybe be inclined to try the Borg Warner pump over other brands but you're only saving $70 over the Blue Box Volvo part by doing so.

[vtl]

I bought my last pump off of FCP, Volvo brand. I've had bad luck with aftermarket pumps both Dorman and Vaico (6 months each). Too much labor to try and save $100 on this type of part. Will FCP warrantee a Volvo brand part? I bought their Haldex service kit with Filter and Fluid last time. I would maybe be inclined to try the Borg Warner pump over other brands but you're only saving $70 over the Blue Box Volvo part by doing so.

Because Borg Warner acquired Haldex, and Haldex who made this AWD. This is what I put in this time, and the pump and filter were 1:1 with Volvo OE I've taken out. The only major difference was the Febi Bilstein fluid, which smelled differently. But it didn't have the wax formation inside the bottle, which is a good sign. Wax was killing pumps prematurely. It could be that Haldex has changed the formula over the years. Febi does not make stuff, only rebrands OEs.

Anyways, my XC70 is a terrific suburbs winter vehicle again

[leapdragon]

Well... I finally got outside today (it's been a busy couple of months) to pull the drive shaft and angle gear and see where we are.

Where we are is that the collar sleeve is fine, but the teeth on the angle are 100% destroyed, almost nonexistent. I suspect this will be a permanent FWD vehicle until retirement (I'm still not sure about the distaste for FWD conversion, I drove my '07 as FWD for a summer while I waited on a drive shaft replacement and it seemed fine, and the FWD and AWD share cv axles, suspension components, transmission, etc. so they should be very similar).

But before I decide, a couple of questions:

- Is there any interchangeability between angle gear years? There seem to be a lot of 03+ out there, and a bunch of 99-00, but not so many 01-02. There is 0 chance I will buy new.

- At the same time, I worry about wear on any used units that has already occurred. Is there any availability of subcomponents for these things, to rebuild the unit on the bench? I assume not, but never hurts to ask...

- I know there's a welded solution, but that means I will have to put in the effort to get the current sleeve off of the transmission, and it is on there Good and Tight, I suspect it will not be fun. I know some people weld these things... Assuming I can even get the old sleeve off, what is the likelihood of successful welding to an angle gear unit that has zero teeth on it? Will the welds alone be strong enough to hold? There's a lot of torque there in 1st...

[vtl]

You can get any bevel gear and change the flange to convert it to 01-02.

[leapdragon]

That's good info vtl, thank you! Does that apply to 99-00 as well, or only p2?

[vtl]

That's good info vtl, thank you! Does that apply to 99-00 as well, or only p2?

I only know about P2.

[abscate]

That's good info vtl, thank you! Does that apply to 99-00 as well, or only p2?

The 1998-99-00 p80 AWD are special snowflakes , there were two (three? ) versions of driveshaft, viscous coupling used which have to be matched. There is a thread on that.