Clearance Lights

74_Coach

74_Coach

Active member
Oct 28, 2019
670
246
43
Central Coast, CA
What size "we'll nuts" did you use? I discovered after our first hard rain this week (purchased '74 GMC in June) that there was a drip drip drip from
the windshield gasket inside above driver and noticed the plastic clearance lens is really loose.
--
Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of 6/26/19
 
I use 3/8" diameter x 1/2" reach neoprene "well nuts" with brass threaded
inserts I believe that the threads are 10/32. The LED LIGHTS will determine
the overall length of the stainless steel filister head, Phillip's drive
hold down screws. I use 1 1/4" fully threaded ones in my assemblies. Your
assemblies will vary. If you are trying to use original clearance lights,
good luck with the leaks. You are fighting a losing battle.
Jim Hupy
Salem, Oregon

On Wed, Jan 1, 2020, 9:42 AM Ed Clerkin via Gmclist
wrote:

> What size "we'll nuts" did you use? I discovered after our first hard rain
> this week (purchased '74 GMC in June) that there was a drip drip drip from
> the windshield gasket inside above driver and noticed the plastic
> clearance lens is really loose.
> --
> Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of
> 6/26/19
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
If the lense has not been replaced, you need to replace them as the UV has
deteriate the lense and the inner gasket also needs to be replaced

On Wed, Jan 1, 2020 at 9:55 AM James Hupy via Gmclist <

> I use 3/8" diameter x 1/2" reach neoprene "well nuts" with brass threaded
> inserts I believe that the threads are 10/32. The LED LIGHTS will determine
> the overall length of the stainless steel filister head, Phillip's drive
> hold down screws. I use 1 1/4" fully threaded ones in my assemblies. Your
> assemblies will vary. If you are trying to use original clearance lights,
> good luck with the leaks. You are fighting a losing battle.
> Jim Hupy
> Salem, Oregon
>
> On Wed, Jan 1, 2020, 9:42 AM Ed Clerkin via Gmclist <
> gmclist>

>
> > What size "we'll nuts" did you use? I discovered after our first hard
> rain
> > this week (purchased '74 GMC in June) that there was a drip drip drip
> from
> > the windshield gasket inside above driver and noticed the plastic
> > clearance lens is really loose.
> > --
> > Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of
> > 6/26/19
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502
 
Thank Jim. I just replaced all 5 front lenses, lens gasket and body gasket purchased from your business. The OEM nut attached to the top was excellent
just the screws need replacement with stainless screws (weekend project). I will be water testing tomorrow then moving to the rear clearance lights.

On another subject, I just finished a complete front suspension rebuild including a steering box replacement from you folks but steering is still
wandering left, right, left, right. I provided the GMC maintenance manuals for an explanation of the height adjustment and I know they got the height
adjustment correct as they wrote down all of the settings including front camber. But I am not sure the shop adjusted rear wheel camber. I read here
that a maladjusted camber on the tandem wheels can cause wandering. I have a tru-track that needs installed but not sure it will solve steering
wander. Any suggestions would be appreciated.
--
Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of 6/26/19
 
> On another subject, I just finished a complete front suspension rebuild including a steering box replacement from you folks but steering is still
> wandering left, right, left, right. I provided the GMC maintenance manuals for an explanation of the height adjustment and I know they got the
> height adjustment correct as they wrote down all of the settings including front camber. But I am not sure the shop adjusted rear wheel camber. I
> read here that a maladjusted camber on the tandem wheels can cause wandering. I have a tru-track that needs installed but not sure it will solve
> steering wander. Any suggestions would be appreciated.

You should really take this to a new thread so others can benefit from group knowledge.

Here is a post copy/pasted to this that I posted a while back. HTH

Most of the time when someone complains of this kind of steering issue, the steering gear is no longer on "high point'. I'm guessing that at some time
in the past, someone took your steering shaft apart and did not put it back together right. There is a very specific procedure that needs to be
followed to get it back where it belongs. Alex Ferrara has mastered the art of putting it on high point and cured something over 100 GMC's with
handling manners. So, driving your coach to Florida to have Alex F. do the adjustment on your steering box is not practical. So check out this set of
instructions posted on the GMCphoto site of how to do high point.

http://www.gmcmhphotos.com/photos/steering-gear-box/p52883-set-steering-box-highpoint.html

Let us know how things turn out.

--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
> > On another subject, I just finished a complete front suspension rebuild including a steering box replacement from you folks but steering is
> > still wandering left, right, left, right. I provided the GMC maintenance manuals for an explanation of the height adjustment and I know they got
> > the height adjustment correct as they wrote down all of the settings including front camber. But I am not sure the shop adjusted rear wheel
> > camber. I read here that a maladjusted camber on the tandem wheels can cause wandering. I have a tru-track that needs installed but not sure it
> > will solve steering wander. Any suggestions would be appreciated.
>
> You should really take this to a new thread so others can benefit from group knowledge.
>
> Here is a post copy/pasted to this that I posted a while back. HTH
>
> Most of the time when someone complains of this kind of steering issue, the steering gear is no longer on "high point'. I'm guessing that at some
> time in the past, someone took your steering shaft apart and did not put it back together right. There is a very specific procedure that needs to be
> followed to get it back where it belongs. Alex Ferrara has mastered the art of putting it on high point and cured something over 100 GMC's with
> handling manners. So, driving your coach to Florida to have Alex F. do the adjustment on your steering box is not practical. So check out this set
> of instructions posted on the GMCphoto site of how to do high point.
>
> http://www.gmcmhphotos.com/photos/steering-gear-box/p52883-set-steering-box-highpoint.html
>
> Let us know how things turn out.

Thanks Larry for the URL! Yes, I will move this question to it's own thread.

Ed
--
Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of 6/26/19
 
Ed,
Contact me as we ca review what you did and what need to be done.

On Thu, Jan 2, 2020 at 7:10 AM Ed Clerkin via Gmclist <

> > > On another subject, I just finished a complete front suspension
> rebuild including a steering box replacement from you folks but steering is
> > > still wandering left, right, left, right. I provided the GMC
> maintenance manuals for an explanation of the height adjustment and I know
> they got
> > > the height adjustment correct as they wrote down all of the settings
> including front camber. But I am not sure the shop adjusted rear wheel
> > > camber. I read here that a maladjusted camber on the tandem wheels can
> cause wandering. I have a tru-track that needs installed but not sure it
> > > will solve steering wander. Any suggestions would be appreciated.
> >
> > You should really take this to a new thread so others can benefit from
> group knowledge.
> >
> > Here is a post copy/pasted to this that I posted a while back. HTH
> >
> > Most of the time when someone complains of this kind of steering issue,
> the steering gear is no longer on "high point'. I'm guessing that at some
> > time in the past, someone took your steering shaft apart and did not put
> it back together right. There is a very specific procedure that needs to be
> > followed to get it back where it belongs. Alex Ferrara has mastered the
> art of putting it on high point and cured something over 100 GMC's with
> > handling manners. So, driving your coach to Florida to have Alex F. do
> the adjustment on your steering box is not practical. So check out this set
> > of instructions posted on the GMCphoto site of how to do high point.
> >
> >
> http://www.gmcmhphotos.com/photos/steering-gear-box/p52883-set-steering-box-highpoint.html
> >
> > Let us know how things turn out.
>
> Thanks Larry for the URL! Yes, I will move this question to it's own
> thread.
>
> Ed
> --
> Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of
> 6/26/19
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502
 
Will do next week. Unfortunately, I don't have a level driveway to do work myself so I have to rely on a local shop for all maintenance.
--
Ed Clerkin | 1974 GMC Canyon Lands 26’ | 14,445 original miles as of 6/26/19
 
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