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bogie difference side to side [message #156821] Sun, 15 January 2012 18:04 Go to next message
skip2 is currently offline  skip2   United States
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Just finished making my version of the Mark/Sully air bags and works like a champ I use to run around 60psi and now the auto travel setting is happy at 40psi. The only thing I ran to is that on the left side I have enough room to put my hand between the firestone bag and the fender well on the back of the bag but on the right there is zero clearance must not be hitting the well though, just took a hundred mile trip today and did not hear it scrapping once. I went over several speed tables going into the state park and you could tell the front suspension went over it but you wouldn't have known it was there with the feel from the rear. I digress, back to my original question is there a known issue with the fender wells or the bogies being a little different side to side. Thank you Mark and Sully for all your great photos and drawings. Skip Smile

74 Canyon Lands, FiTech, 3.7 FD LSD, Manny Tranny, Springfield Distributor, 2001 Chevy Tracker Ragtop Towd
Re: [GMCnet] bogie difference side to side [message #156823 is a reply to message #156821] Sun, 15 January 2012 18:08 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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On Sun, Jan 15, 2012 at 4:04 PM, Skip Hartline <skiphartline@aol.com> wrote:

>
>
> Just finished making my version of the Mark/Sully air bags and works like
> a champ I use to run around 60psi and now the auto travel setting is happy
> at 40psi.


did you check rear frame height? I don't think it is possible for correct
ride height at these pressures.

gene


Gene Fisher -- 74-23,77PB/ore/ca
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Re: [GMCnet] bogie difference side to side [message #156824 is a reply to message #156821] Sun, 15 January 2012 18:14 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Skip,

The bogies and the wheel wells are the same. I hate to say this but you could have a frame problem. There is a known problem with
corrosion between the inner and outer frames back at the bogies. When it occurs the bottom of the wheels splay outwards.

http://www.gmcmhphotos.com/photos/showphoto.php?photo=25942

Regards,
Rob M.

-----Original Message-----
From: Skip Hartline

Just finished making my version of the Mark/Sully air bags and works like a champ I use to run around 60psi and now the auto travel
setting is happy at 40psi. The only thing I ran to is that on the left side I have enough room to put my hand between the firestone
bag and the fender well on the back of the bag but on the right there is zero clearance must not be hitting the well though, just
took a hundred mile trip today and did not hear it scrapping once. I went over several speed tables going into the state park and
you could tell the front suspension went over it but you wouldn't have known it was there with the feel from the rear. I digress,
back to my original question is there a known issue with the fender wells or the bogies being a little different side to side. Thank
you Mark and Sully for all your great photos and drawings. Skip :)

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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
Re: [GMCnet] bogie difference side to side [message #156829 is a reply to message #156824] Sun, 15 January 2012 18:34 Go to previous messageGo to next message
skip2 is currently offline  skip2   United States
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I been under there and have seen no sign of corrosion. I see no signs from the outside of wheels tilting. As far as I know it's never seen salted roads I'm the 3rd owner it's been in Florida its whole life but I will definitely look closer now.


74 Canyon Lands, FiTech, 3.7 FD LSD, Manny Tranny, Springfield Distributor, 2001 Chevy Tracker Ragtop Towd
Re: [GMCnet] bogie difference side to side [message #156832 is a reply to message #156829] Sun, 15 January 2012 18:42 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Skip,

Park the GMC on a flat level surface (front to back and left to right) and hold a small level vertically on the outside of the frame
as close to the bogie mount on both sides (driver and passenger) and see if it is the same.

Regards,
Rob M.

-----Original Message-----
From: Skip Hartline

I been under there and have seen no sign of corrosion. I see no signs from the outside of wheels tilting. As far as I know it's
never seen salted roads I'm the 3rd owner it's been in Florida its whole life but I will definitely look closer now.


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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
Re: [GMCnet] bogie difference side to side [message #156834 is a reply to message #156829] Sun, 15 January 2012 18:44 Go to previous messageGo to next message
k2gkk is currently offline  k2gkk   United States
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Salted roads are not the only source of corrosion on motor vehicles.
The salt-laden air in coastal regions is perfectly capable of causing
AT LEAST as much corrosion as salted roads can.

The 2007 Harley I bought in 2007 for my wife from Palm Beach, FL
has noticable corrosion on aluminum parts even though it had only
been ridden 32 miles since new but kept in Palm Beach proper!

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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> To: gmclist@temp.gmcnet.org
> From: skiphartline@aol.com
> Date: Sun, 15 Jan 2012 18:34:36 -0600
> Subject: Re: [GMCnet] bogie difference side to side
>
> I been under there and have seen no sign of corrosion. I see no signs from the outside of wheels tilting. As far as I know it's never seen salted roads I'm the 3rd owner it's been in Florida its whole life but I will definitely look closer now.

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Re: bogie difference side to side [message #156865 is a reply to message #156821] Sun, 15 January 2012 20:43 Go to previous messageGo to next message
Dennis S is currently offline  Dennis S   United States
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A couple of thoughts...

1 are the bags the same diameter when inflated?

2 the wheel well liners may not have been installed equal distances from the frame. It was the 70's and car manufacturing was not all that exact. Measure from the swing arm to the wheel well liners in a couple of places. Since the OEM bag was smaller diameter it would not have been an issue.

Dennis

skip2 wrote on Sun, 15 January 2012 18:04

Just finished making my version of the Mark/Sully air bags and works like a champ I use to run around 60psi and now the auto travel setting is happy at 40psi. The only thing I ran to is that on the left side I have enough room to put my hand between the firestone bag and the fender well on the back of the bag but on the right there is zero clearance must not be hitting the well though, just took a hundred mile trip today and did not hear it scrapping once. I went over several speed tables going into the state park and you could tell the front suspension went over it but you wouldn't have known it was there with the feel from the rear. I digress, back to my original question is there a known issue with the fender wells or the bogies being a little different side to side. Thank you Mark and Sully for all your great photos and drawings. Skip Smile



Dennis S
73 Painted Desert 230
Memphis TN Metro
Re: [GMCnet] bogie difference side to side [message #156876 is a reply to message #156865] Sun, 15 January 2012 21:46 Go to previous message
Mr ERFisher is currently offline  Mr ERFisher   United States
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Registered: August 2005
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The only thing that counts is the frame / ride height

Gene

FREE WIFI @ Mickey D





On Jan 15, 2012, at 6:43 PM, Dennis Sexton <dennisfsexton@aol.com> wrote:

>
>
> A couple of thoughts...
>
> 1 are the bags the same diameter when inflated?
>
> 2 the wheel well liners may not have been installed equal distances from the frame. It was the 70's and car manufacturing was not all that exact. Measure from the swing arm to the wheel well liners in a couple of places. Since the OEM bag was smaller diameter it would not have been an issue.
>
> Dennis
>
> skip2 wrote on Sun, 15 January 2012 18:04
>> Just finished making my version of the Mark/Sully air bags and works like a champ I use to run around 60psi and now the auto travel setting is happy at 40psi. The only thing I ran to is that on the left side I have enough room to put my hand between the firestone bag and the fender well on the back of the bag but on the right there is zero clearance must not be hitting the well though, just took a hundred mile trip today and did not hear it scrapping once. I went over several speed tables going into the state park and you could tell the front suspension went over it but you wouldn't have known it was there with the feel from the rear. I digress, back to my original question is there a known issue with the fender wells or the bogies being a little different side to side. Thank you Mark and Sully for all your great photos and drawings. Skip :)
>
>
> --
> Dennis S
> 73 Painted Desert 230
> Germantown, TN
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