Home » Public Forums » GMCnet » [GMCnet] Clunk, Clunk.
| [GMCnet] Clunk, Clunk. [message #94731] |
Thu, 05 August 2010 14:11  |
980
Messages: 192
Registered: July 2010
Location: United States
Karma: -1
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The mystery of my front left wheel continues...
Just came back from another trip to Uncle Jim's in Fremont. Always a
pleasure to go there, the staff is great to work with. Too bad they
only work on GMC's. They communicated well with me during the repair
and had it done quickly. They solved a bunch of issues and gave me
peace of mind on several unknowns aboard but there's one elusive gremlin
that I'm still working out.
I've been chasing down a noise in my front left wheel. On a left turn,
when the weight is a bit off of that wheel, it makes a pretty awful
"clunking" noise. I've looked to see if the tire is rubbing anything
and I don't see any signs. We did a quick test drive in the parking lot
and didn't hear it, but after I drove out the driveway and over the bump
between the lot and the road it came back, though not as bad as before.
Didn't have the time to leave it there right now and keep investigating,
so I'm going to try to figure more of it out on the road and see what I
can do
I've done the upper and lower control arm bushings, the sway bar
bushings, the shocks, the bearings check out okay (Donny says they're
some kind of "wall-less bearing kit" that's different than normal but he
estimates 20k miles to go on them.) I replaced the ball-joints. The
tie rods and steering linkage looks good. Coach is otherwise a pleasure
to drive, goes straight down the road (+3.5 caster from the offset upper
bushings), doesn't jump in the grooves or anything but when I turn left,
especially if some load is lifting up off of that wheel while turning,
"clunk!"
Your thoughts?
Desmond
--
1977 GMC ex-Palm Beach, 26-3
Treasure Island, CA
KC6VHG, KAG0675 "980"
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| Re: [GMCnet] Clunk, Clunk. [message #94735 is a reply to message #94731] |
Thu, 05 August 2010 14:27  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""I've been chasing down a noise in my front left wheel. On a left turn,
when the weight is a bit off of that wheel, it makes a pretty awful
"clunking" noise. I've looked to see if the tire is rubbing anything
and I don't see any signs. We did a quick test drive in the parking lot
and didn't hear it, but after I drove out the driveway and over the bump
between the lot and the road it came back, though not as bad as before.
Didn't have the time to leave it there right now and keep investigating,
so I'm going to try to figure more of it out on the road and see what I
can do
""
Two things come to mind and I'm sure there will be more. One is to check the clearance between the frame diagonal brace that goes under the torsion bar--many of those get bent and under certain movements will hit the torsion bar. Another thing to try is lightly apply the brakes under one of those manuevers and seeif the clunking stops. If it does, it can be a claiper that is sloppy on the knuckle, or loose brake pads in the caliper.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Clunk, Clunk. [message #94737 is a reply to message #94731] |
Thu, 05 August 2010 14:43 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Perhaps Donny meant Wallace hubs instead of wall-less --
bdub has Wallace brochures on his website. Modified three bearing invention -- with grease zerks.
Dennis Sexton
73 PD 230
Germantown, TN
USA
-----Original Message-----
From: Desmond's GMC <980@opg.org>
To: gmclist@temp.gmcnet.org
Sent: Thu, Aug 5, 2010 2:11 pm
Subject: [GMCnet] Clunk, Clunk.
(Donny says they're
ome kind of "wall-less bearing kit" that's different than normal but he
stimates 20k miles to go on them.) Your thoughts?
Desmond
--
977 GMC ex-Palm Beach, 26-3
reasure Island, CA
C6VHG, KAG0675 "980"
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MCnet mailing list
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Clunk, Clunk. [message #94739 is a reply to message #94731] |
Thu, 05 August 2010 14:45 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Desmond,
Here's info on your "wall-less" bearings:
http://www.bdub.net/publications/Wallace_Bearings/Wallace_Bearings1.htm
No longer available.
<http://www.bdub.net/publications/Wallace_Bearings/Wallace_Bearings1.htm>
Ken H.
On Thu, Aug 5, 2010 at 3:11 PM, Desmond's GMC <980@opg.org> wrote:
> The mystery of my front left wheel continues...
>
bushings, the shocks, the bearings check out okay (Donny says they're
> some kind of "wall-less bearing kit" that's different than normal but he
> estimates 20k miles to go on them.)
...
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Clunk, Clunk. [message #94741 is a reply to message #94738] |
Thu, 05 August 2010 15:00 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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Desmond,
You are very fortunate to live close enough to be a counter customer.
Dennis Sexton
73 PD 230
Germantown, TN
USA
-----Original Message-----
From: Desmond's GMC <980@opg.org>
To: gmclist@temp.gmcnet.org
Sent: Thu, Aug 5, 2010 2:48 pm
Subject: Re: [GMCnet] Clunk, Clunk.
bdub has Wallace brochures on his website. Modified three bearing invention --
ith grease zerks.
OL! I'd never heard of them before. I had no idea and it's a homonym,
ven. I'll go after that brochure. Thanks for straightening me out!
Donny really impressed me with his knowledge. I just didn't realize
ow much! I'm always in some kind of hurry down there and I hate
ushing out. That's a real well of expertise and I'm always amazed at
ow many coaches are on the lot. It's worth the trip just to see them.
Desmond
--
977 GMC ex-Palm Beach, 26-3
reasure Island, CA
C6VHG, KAG0675 "980"
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MCnet mailing list
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Clunk, Clunk. [message #94748 is a reply to message #94741] |
Thu, 05 August 2010 15:43 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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clunk clunk or click click? Could be a CV joint?
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] Clunk, Clunk. [message #94751 is a reply to message #94731] |
Thu, 05 August 2010 15:40 |
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Could be a CV joint. That was Chris' (W6ATV) problem.
On 8/5/2010 12:11 PM, Desmond's GMC wrote:
> The mystery of my front left wheel continues...
>
> Just came back from another trip to Uncle Jim's in Fremont. Always a
> pleasure to go there, the staff is great to work with. Too bad they
> only work on GMC's. They communicated well with me during the repair
> and had it done quickly. They solved a bunch of issues and gave me
> peace of mind on several unknowns aboard but there's one elusive gremlin
> that I'm still working out.
>
> I've been chasing down a noise in my front left wheel. On a left turn,
> when the weight is a bit off of that wheel, it makes a pretty awful
> "clunking" noise. I've looked to see if the tire is rubbing anything
> and I don't see any signs. We did a quick test drive in the parking lot
> and didn't hear it, but after I drove out the driveway and over the bump
> between the lot and the road it came back, though not as bad as before.
> Didn't have the time to leave it there right now and keep investigating,
> so I'm going to try to figure more of it out on the road and see what I
> can do
>
> I've done the upper and lower control arm bushings, the sway bar
> bushings, the shocks, the bearings check out okay (Donny says they're
> some kind of "wall-less bearing kit" that's different than normal but he
> estimates 20k miles to go on them.) I replaced the ball-joints. The
> tie rods and steering linkage looks good. Coach is otherwise a pleasure
> to drive, goes straight down the road (+3.5 caster from the offset upper
> bushings), doesn't jump in the grooves or anything but when I turn left,
> especially if some load is lifting up off of that wheel while turning,
> "clunk!"
>
> Your thoughts?
>
> Desmond
>
>
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Terry Taylor
'74 ex-Eleganza SE
San Lorenzo, CA
http://www.n6mon.org
http://dldesignstore.com
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| Re: [GMCnet] Clunk, Clunk. [message #94757 is a reply to message #94740] |
Thu, 05 August 2010 16:34 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I taught the technical stuff to him. Rest he picks up as he goes.
We exchange info here and they are encouraged to call other people we deal
with like : Serum's, Coop, Grandview,and MGM.
On Thu, Aug 5, 2010 at 1:04 PM, Dan Gregg <gregg_dan@hotmail.com> wrote:
>
>
> Just hang close to Uncle Jim's place. Donny is good on these things. Jim
> might learn from him if he would slow down a bit and stay off the phone and
> computer. :o
> Dan
> --
> Dan & Teri Gregg
>
> http://danandteri.blogspot.com/
>
>
>
>
> _______________________________________________
> GMCnet mailing list
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> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Clunk, Clunk. [message #94767 is a reply to message #94731] |
Thu, 05 August 2010 19:17 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| 980 wrote on Thu, 05 August 2010 12:11 |
The mystery of my front left wheel continues...
<< snipped >>
I've been chasing down a noise in my front left wheel. On a left turn,
when the weight is a bit off of that wheel, it makes a pretty awful
"clunking" noise.
<< snipped >>
|
My 1973 has the same symtoms. The homemade (plywood) 3 battery tray bumps the body. (Or vice versa... body flex.)
The point is: Are you sure it is suspension related?
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Clunk, Clunk. [message #94774 is a reply to message #94731] |
Thu, 05 August 2010 20:25 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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I wonder if that's a "feature" of the Wallace bearings. There was some
discussion a few months back about how you would ever balance the load
across 3 bearings.
Perhaps one of them is clunking under the light load.
Larry Davick
Ljdavick at comcast.net
On Aug 5, 2010, at 12:11 PM, Desmond's GMC <980@opg.org> wrote:
> The mystery of my front left wheel continues...
>
> Just came back from another trip to Uncle Jim's in Fremont. Always a
> pleasure to go there, the staff is great to work with. Too bad they
> only work on GMC's. They communicated well with me during the repair
> and had it done quickly. They solved a bunch of issues and gave me
> peace of mind on several unknowns aboard but there's one elusive
> gremlin
> that I'm still working out.
>
> I've been chasing down a noise in my front left wheel. On a left
> turn,
> when the weight is a bit off of that wheel, it makes a pretty awful
> "clunking" noise. I've looked to see if the tire is rubbing anything
> and I don't see any signs. We did a quick test drive in the parking
> lot
> and didn't hear it, but after I drove out the driveway and over the
> bump
> between the lot and the road it came back, though not as bad as
> before.
> Didn't have the time to leave it there right now and keep
> investigating,
> so I'm going to try to figure more of it out on the road and see
> what I
> can do
>
> I've done the upper and lower control arm bushings, the sway bar
> bushings, the shocks, the bearings check out okay (Donny says they're
> some kind of "wall-less bearing kit" that's different than normal
> but he
> estimates 20k miles to go on them.) I replaced the ball-joints. The
> tie rods and steering linkage looks good. Coach is otherwise a
> pleasure
> to drive, goes straight down the road (+3.5 caster from the offset
> upper
> bushings), doesn't jump in the grooves or anything but when I turn
> left,
> especially if some load is lifting up off of that wheel while turning,
> "clunk!"
>
> Your thoughts?
>
> Desmond
>
> --
> 1977 GMC ex-Palm Beach, 26-3
> Treasure Island, CA
> KC6VHG, KAG0675 "980"
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Clunk, Clunk. [message #94797 is a reply to message #94751] |
Thu, 05 August 2010 23:39 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Could be a CV joint. That was Chris' (W6ATV) problem.
"" Click click clunk clunk" These are difficult to diagnose on line but I don't think a CV joint will cause a clunk--a click, maybe 
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Clunk, Clunk. [message #94820 is a reply to message #94731] |
Fri, 06 August 2010 07:39 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Check out the steering coupler. It is made to move up and down as the
body flexes on the chassis if the teflon coating is missing, or worn,
and it has not been lubed, it could cause what you describe. If the
cinch bolt is not tight, it could also cause that noise.
On Thu, Aug 5, 2010 at 12:11 PM, Desmond's GMC <980@opg.org> wrote:
> The mystery of my front left wheel continues...
>
> Just came back from another trip to Uncle Jim's in Fremont. Always a
> pleasure to go there, the staff is great to work with. Too bad they
> only work on GMC's. They communicated well with me during the repair
> and had it done quickly. They solved a bunch of issues and gave me
> peace of mind on several unknowns aboard but there's one elusive gremlin
> that I'm still working out.
>
> I've been chasing down a noise in my front left wheel. On a left turn,
> when the weight is a bit off of that wheel, it makes a pretty awful
> "clunking" noise. I've looked to see if the tire is rubbing anything
> and I don't see any signs. We did a quick test drive in the parking lot
> and didn't hear it, but after I drove out the driveway and over the bump
> between the lot and the road it came back, though not as bad as before.
> Didn't have the time to leave it there right now and keep investigating,
> so I'm going to try to figure more of it out on the road and see what I
> can do
>
> I've done the upper and lower control arm bushings, the sway bar
> bushings, the shocks, the bearings check out okay (Donny says they're
> some kind of "wall-less bearing kit" that's different than normal but he
> estimates 20k miles to go on them.) I replaced the ball-joints. The
> tie rods and steering linkage looks good. Coach is otherwise a pleasure
> to drive, goes straight down the road (+3.5 caster from the offset upper
> bushings), doesn't jump in the grooves or anything but when I turn left,
> especially if some load is lifting up off of that wheel while turning,
> "clunk!"
>
> Your thoughts?
>
> Desmond
>
> --
> 1977 GMC ex-Palm Beach, 26-3
> Treasure Island, CA
> KC6VHG, KAG0675 "980"
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Clunk, Clunk. [message #94822 is a reply to message #94820] |
Fri, 06 August 2010 07:48 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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If your cross brace is bent, (Mine were) remove the brace, re-install it upside down and straighten it out using your bottle jack under the low point. Go slow and it will return to close to it's original shape. Worked for me.
Tom Phipps,
75 GMC Ex-Avion
2012 Phoenix Cruiser model 2552
KA4CSG
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