IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

Uneven tire wear -- bad rear diff?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

rlrhett
Posts: 21
Joined: Wed Mar 02, 2005 8:04 pm
Year and Model: 2002 v70 XC
Location: California
Has thanked: 0
Been thanked: 0
United States of America
rlrhett

Uneven tire wear -- bad rear diff?

Post by rlrhett » Sat Sep 24, 2016 2:18 pm

I've noticed an odd thing on my 2002 V70 XC. One rear tire has worn considerably more than the other. I have heard conflicting opinions on why that might be. One camp has it that this is fairly normal for a car with limited slip rear differential that is mostly driven in city (as opposed to highway) driving. The other camp says the diff is not working properly and appears to be locking the rear wheels together. There is no noise and the car tracks true.

Here are pictures of the tires. Driver's side rear tire looks fairly good, while the passenger side wheel is worn. Is this indicative of a problem? What should I do to test to confirm a problem in the diff?
IMG_3556.jpg
IMG_3556.jpg (30.28 KiB) Viewed 1785 times
IMG_3555.jpg
IMG_3555.jpg (27.81 KiB) Viewed 1785 times

User avatar
oragex
Posts: 4698
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 94 times
Been thanked: 244 times
Contact:
Canada
oragex

Re: Uneven tire wear -- bad rear diff?

Post by oragex » Sat Sep 24, 2016 4:22 pm

I assume you have installed both tires from new? If so the worn one gets all the traction while the other one is just rolling. Do front tires wear as little as the one in the upper picture?

rlrhett
Posts: 21
Joined: Wed Mar 02, 2005 8:04 pm
Year and Model: 2002 v70 XC
Location: California
Has thanked: 0
Been thanked: 0
United States of America
rlrhett

Re: Uneven tire wear -- bad rear diff?

Post by rlrhett » Sat Sep 24, 2016 6:53 pm

Yes, they were put on at the same time from new. I always do them in twos, same make model and size for all four. The fronts have a tendency to wear out faster, so at some point when money was tight I changed them out without changing the back. Since then they have been out of sync, so I can't really tell whether the fronts are wearing like the driver or passenger side of the back. However, their ware is even passenger to driver side.

Someone told me that the problem was that as the car goes around right corners the outer wheel is spinning faster. The diff is not letting the inner tire spin more slowly causing it to essentially skid around the corner. Nothing but conjecture. No test has been done. Don't know what or how I would test. But I throw that out there as a data point.

jonesg
Posts: 859
Joined: Wed Jan 16, 2008 3:25 pm
Year and Model: 2004 V70
Location: Northern maine.
Has thanked: 2 times
Been thanked: 13 times
Wales
jonesg

Re: Uneven tire wear -- bad rear diff?

Post by jonesg » Sun Sep 25, 2016 3:31 am

What about getting the alignment checked.

rlrhett
Posts: 21
Joined: Wed Mar 02, 2005 8:04 pm
Year and Model: 2002 v70 XC
Location: California
Has thanked: 0
Been thanked: 0
United States of America
rlrhett

Re: Uneven tire wear -- bad rear diff?

Post by rlrhett » Sun Sep 25, 2016 9:58 pm

jonesg wrote:What about getting the alignment checked.

Good suggestion. Some times it is the most obvious things. Ill check it this week and post back.

DrBoost
Posts: 1
Joined: Tue Sep 27, 2016 7:16 am
Year and Model: 2001 Volvo V70 T5
Location: Fenton, MI
Has thanked: 0
Been thanked: 0
United States of America
DrBoost

Re: Uneven tire wear -- bad rear diff?

Post by DrBoost » Tue Sep 27, 2016 7:21 am

If the tire was, essentially, dragging due to a bad differential, you'd hear howling often. It would also cause some issues while traveling in a straight line. The differential fluid would also be burned as well. I suspect alignment. The outside is worn more than the inside, that's alignment for sure (camber). The tread is also warn across the entire width, that wold make me suspect the toe is out of spec as well.
Let us know what you find.

User avatar
kcodyjr
Posts: 1110
Joined: Sun Jan 31, 2010 11:48 pm
Year and Model: 1997 850 GLT
Location: Massachusetts, USA
Has thanked: 0
Been thanked: 1 time
United States of America
kcodyjr

Re: Uneven tire wear -- bad rear diff?

Post by kcodyjr » Tue Sep 27, 2016 10:30 am

Also, resolve it quickly. Having tires with different diameters stresses the hell out of the AWD hardware.

Worth checking that differential fluid if you haven't already. It might stink like last week''s trash.
1997 850 GLT sedan, 152K and WHOOHOO!
RIP 1996 850 wagon, 201K, hit by a runaway 4-wheeler
RIP 1996 850 GLT sedan 5spd, 260K, rearended someone
RIP 1986 245 boring, 200K, rusted beyond inspectability
RIP 1981 242 turbo 5spd, 300K, serious teenage crash

User avatar
shiloh51933
Posts: 929
Joined: Fri Mar 05, 2010 7:12 pm
Year and Model: 04 XC70/'98 V70XC
Location: New York
Has thanked: 11 times
Been thanked: 9 times
United States of America
shiloh51933

Re: Uneven tire wear -- bad rear diff?

Post by shiloh51933 » Thu Mar 02, 2017 11:46 am

kcodyjr wrote:Also, resolve it quickly. Having tires with different diameters stresses the hell out of the AWD hardware.

Worth checking that differential fluid if you haven't already. It might stink like last week''s trash.
+1
Have you been rotating tires every 5K?
If U Wanna Play U Gotta Pay!!

User avatar
vtl
Posts: 1804
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 56 times
United States of America
vtl

Re: Uneven tire wear -- bad rear diff?

Post by vtl » Fri Mar 03, 2017 2:51 pm

Too much toe-in.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

User avatar
abscate
MVS Moderator
Posts: 20560
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 290 times
Been thanked: 908 times
Trinidad & Tobago
abscate

Re: Uneven tire wear -- bad rear diff?

Post by abscate » Sat Mar 04, 2017 8:23 am

Bad alignment. Look how badly the outside edge is worn relative to inner

Toe in most likely, camber possible but that will probably mean bent suspension parts
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

Post Reply
  • Similar Topics
    Replies
    Views
    Last post