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tire wear [message #132028]

Sat, 25 June 2011 21:48

Rickmo

Messages: 105
Registered: January 2011
Location: Gladwin, Michigan

Karma: 0

Senior Member

I had my coach aligned according to the specifications listed in my owners maintenance manual. It drives like a dream but I noticed today that after our 5000 mile road trip, the front tires are wearing quite a bit on the outside two rows of tread. Is this normal?? Both sides are wearing the same.

Rick Seebeck Gladwin Michigan 1973 Canyon Lands

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Re: tire wear [message #132030 is a reply to message #132028]

Sat, 25 June 2011 22:00

roy1

Messages: 2126
Registered: July 2004
Location: Minden nevada

Karma: 6

Senior Member

no it isn't

Roy Keen Minden,NV 76 X Glenbrook

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Re: [GMCnet] tire wear [message #132032 is a reply to message #132030]

Sat, 25 June 2011 22:08

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

Probably too much toe in. Have it rechecked.
Jim Hupy
Salem, OR
78 GMc Royale 403

On Sat, Jun 25, 2011 at 8:00 PM, <roy@gmcnet.org> wrote:

>
>
> no it isn't
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Re: tire wear [message #132033 is a reply to message #132028]

Sat, 25 June 2011 22:13

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

If both tires are worn evenly then more than likely the toe adjustment is off. If the static toe adjustment is not off, then you probably have worn lower a-frame bushings allowing the wheels to move forward under load and affecting the toe adjustment as you are moving. Take a good look at the lower A-Frame bushings and replace them with urethane ones if yours are work.

It is also possible, but highly unlikely, that the camber is off by the same amount on both wheels.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] tire wear [message #132050 is a reply to message #132028]

Sun, 26 June 2011 00:40

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Rick,

I checked and according to Maintenance Manual X-7525 Section 3 Suspension
Page 3A-20 the spec is:

Toe: Check = 0 to 1/4" toe out
Set = 1/8"

Both Bob Drewes and Dave Lenzi recommend 0 toe in/out.

IIRC the GMC toes in under power so I'd guess even though it drives well
either the alignment wasn't correct or there is something worn that is
allowing the wheels to tow in.

I don't know if this will work but you could try:

1) Put blocks in front and behind both sets of rear wheels
2) Screw parking brake knob all the way in and pull up on the lever.
3) Start the GMC and put it in drive then reverse to make sure it won't
move.
4) Have your wife sit in the drivers seat and put the GMC in drive then
neutral then reverse and then back to neutral to drive while you observe the
front wheels.
5) If they move in and then out look up under the GMC in such way as not to
risk getting run over and see what you can see.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Rick
Sent: Sunday, 26 June 2011 12:49 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] tire wear

I had my coach aligned according to the specifications listed in my owners
maintenance manual. It drives like a dream but I noticed today that after
our 5000 mile road trip, the front tires are wearing quite a bit on the
outside two rows of tread. Is this normal?? Both sides are wearing the
same.
--
Rick Seebeck
Gladwin Michigan
1973 Canyon Lands
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] tire wear [message #132051 is a reply to message #132050]

Sun, 26 June 2011 00:50

idrob

Messages: 645
Registered: January 2005
Location: Central Idaho

Karma: 0

Senior Member

Robert Mueller wrote on Sat, 25 June 2011 22:40

(snip)
I don't know if this will work but you could try:

(snip)

4) Have your wife sit in the drivers seat and put the GMC in drive then
neutral then reverse and then back to neutral to drive while you observe the
front wheels.

Regards,
Rob M.
Sydney, Australia

Geeze, Rob, you mean to check the tow in on my GMC I have to get married first? No wonder the prices have dropped. Laughing

Rob Allen
former owner of '76 x-PB

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Re: [GMCnet] tire wear [message #132063 is a reply to message #132028]

Sun, 26 June 2011 05:27

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

>
> I had my coach aligned according to the specifications listed in my owners
> maintenance manual.

always a good recommendation to read the manual--

however

the new feeling is --- the settings should be
http://www.gmcmotorhome.info/rear.html#settings

0,0,0, all you can get caster ;>)
(this makes it easy to set., also)
gene

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] tire wear [message #132069 is a reply to message #132028]

Sun, 26 June 2011 07:05

Steven Ferguson

Messages: 3447
Registered: May 2006

Karma: 0

Senior Member

Waay to much toe in. Setting the ride height correctly is a critical factor
in the pre-alignment process.

On Sat, Jun 25, 2011 at 7:48 PM, Rick <mrseebeck@gcsnet.org> wrote:

>
>
> I had my coach aligned according to the specifications listed in my owners
> maintenance manual. It drives like a dream but I noticed today that after
> our 5000 mile road trip, the front tires are wearing quite a bit on the
> outside two rows of tread. Is this normal?? Both sides are wearing the
> same.
> --
> Rick Seebeck
> Gladwin Michigan
> 1973 Canyon Lands
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Steve Ferguson
Sierra Vista, AZ
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