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All wheel drive and tires

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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BEJinFbk
Posts: 3678
Joined: Sat Jan 05, 2008 10:32 pm
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
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BEJinFbk

Re: All wheel drive and tires

Post by BEJinFbk » Mon Apr 25, 2016 3:45 pm

And I can only wish I had an Audi to experiment with... Nice Cars! :)
'98 V70 R - Well Equipped for Life Up North... ;)

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misha
Posts: 4133
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
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misha

Re: All wheel drive and tires

Post by misha » Mon Apr 25, 2016 3:53 pm

I prefer Volvos. :wink:
Other makes comes and goes,but Volvo stays.
:mrgreen:
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

MilehighV70XC
Posts: 228
Joined: Tue Oct 06, 2009 7:18 pm
Year and Model: '99 V70XC, 143,000mi
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Re: All wheel drive and tires

Post by MilehighV70XC » Mon Apr 25, 2016 4:56 pm

Misha-- I was not aware a '97 850 came with AWD. I would imagine it is the same setup since I think it was Volvo's first attempt at an AWD. I don't think the states got that model, maybe only outside the state or select countries. Somebody please correct me if I am wrong.

BEJinFbk explained it pretty well. It has nothing to do with the transmission, hence why fwd cars don't have this problem. It is a 100% the viscous coupler
Image
All those disc act just like a transmission clutch disc. When the front or rear start to slip the fluid heats up and starts locking the disc together. That why different tire diameters is catastrophic to the VC. When there is constant slip, like different diameters tires, there is a tremendous amount of heat that builds up and ruins the fluid and disc. Just like if you slip a clutch to much and it starts to smoke, Same concept.

Again, it is not the tire tread being worn that cause the problem. It is the different DIAMETER. Tread type might make a difference if you have let's say a very aggressive snow tire and a bald summer tire. I am just guessing on that aspect. Like I mentioned in my first post. You could have a 225/60/16 brand new and barely worn 225/55/17, as long as the diameter is the same everything should work just fine.

BEJinFbk-- I have always been a Volvo and Audi guy. I definitely prefer to work on a Volvo over an Audi. Since they are over engineered you pay for it. Way more technical and no space to work without removing a lot of stuff. The price for parts is ridiculous compared to a Volvo. With that said, you forget about it the second you get behind the wheel, The Audi is definitely a drivers car. You can really feel the 15k-20k price difference when brand new. Audi is just more refined.
Last edited by MilehighV70XC on Mon Apr 25, 2016 5:17 pm, edited 1 time in total.

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misha
Posts: 4133
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 46 times
Been thanked: 107 times
Serbia
misha

Re: All wheel drive and tires

Post by misha » Mon Apr 25, 2016 5:13 pm

Yep....850 introduced AWD in November 1996.
U.S didn't had them.They were EU & Canada models.
https://en.m.wikipedia.org/wiki/Volvo_850
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

User avatar
BEJinFbk
Posts: 3678
Joined: Sat Jan 05, 2008 10:32 pm
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
Has thanked: 22 times
Been thanked: 42 times
United States of America
BEJinFbk

Re: All wheel drive and tires

Post by BEJinFbk » Mon Apr 25, 2016 7:49 pm

I had a major car crush when the first Quattro's showed up.
I thought "What an Awesome Fairbanks car!" And sure enough, the
Audi's that I've been fortunate enough to drive have never disappointed.

But somehow, I got sucked into the Volvoverse and here I am! :mrgreen:
LOVE the seats... :wink:
'98 V70 R - Well Equipped for Life Up North... ;)

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tom4342
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Year and Model: 1998 v70 awd
Location: hampton
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tom4342

Re: All wheel drive and tires

Post by tom4342 » Tue Apr 26, 2016 7:29 am

I am a big fan of Volvo's now since owning this 98v70 now for 5 years
Tom Hood

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