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Re: [GMCnet] 1 ton question [message #268399 is a reply to message #268351]

Sat, 27 December 2014 21:51

USAussie

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

Karma:

Senior Member

John,

Here's a drawing of the OEM hub / knuckle showing the steering axis. I've made the statement:

It appears to me that if you extend the steering axis (line through center of upper and lower ball joints) it will come close to
going through the center of the tire contact patch.

http://www.gmcmhphotos.com/photos/aa-miscellaneous-photos/p56759-steering-axis.html

The spacer that the 1 Ton uses will shift the wheel / tire outwards.

I am loathe to comment on the effects of that as I do not have a 1 ton front end and have never driven a GMC with a 1 ton front end.
Empirical engineering says it's OK as the people that have them have not complained about what you've noted.

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

-----Original Message-----
From: John R. Lebetski

If the tire /wheel centerline is outside (wider than) the steering axis through the ball joints it will dart at the point where
power exceeds
available traction. I have never studied a 1ton up close, never worked on or driven one, and don't really understand the reason for
the big spacers.

I'm just making the stearing axis statement based on photos. I know it increases the load on the Tbars with a longer lever arm
effective length, so someone please prove ne wrong.
--
John

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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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[Message index]

		1 ton question By: roy1 on Mon, 22 December 2014 17:28
		Re: 1 ton question By: kerry pinkerton on Mon, 22 December 2014 17:34
		Re: 1 ton question By: Hal StClair on Mon, 22 December 2014 17:39
		Re: 1 ton question By: roy1 on Mon, 22 December 2014 19:22
		Re: 1 ton question By: bwevers on Mon, 22 December 2014 19:41
		Re: 1 ton question By: KB on Tue, 23 December 2014 19:14
		Re: 1 ton question By: KB on Tue, 23 December 2014 19:23
		Re: [GMCnet] 1 ton question By: James Hupy on Tue, 23 December 2014 20:15
		Re: 1 ton question By: roy1 on Tue, 23 December 2014 20:34
		Re: 1 ton question By: bwevers on Mon, 22 December 2014 19:47
		Re: 1 ton question By: RF_Burns on Tue, 23 December 2014 13:15
		Re: 1 ton question By: roy1 on Tue, 23 December 2014 16:51
		Re: 1 ton question By: Bob de Kruyff on Fri, 26 December 2014 20:30
		Re: 1 ton question By: JohnL455 on Sat, 27 December 2014 10:23
		Re: 1 ton question By: roy1 on Sat, 27 December 2014 16:05
		Re: [GMCnet] 1 ton question By: USAussie on Sat, 27 December 2014 21:51
		Re: 1 ton question By: rcjordan on Sun, 28 December 2014 07:52
		Re: [GMCnet] 1 ton question By: Mr ERFisher on Sun, 28 December 2014 09:31
		Re: [GMCnet] 1 ton question By: Keith V on Sun, 28 December 2014 10:26
		Re: [GMCnet] 1 ton question By: Ken Henderson on Sun, 28 December 2014 11:35
		Re: [GMCnet] 1 ton question By: James Hupy on Sun, 28 December 2014 12:27
		Re: [GMCnet] 1 ton question By: roy1 on Sun, 28 December 2014 13:28
		Re: [GMCnet] 1 ton question By: Bob de Kruyff on Sun, 28 December 2014 19:54
		Re: 1 ton question By: bwevers on Sun, 28 December 2014 12:06
		Re: 1 ton question By: JohnL455 on Tue, 30 December 2014 09:49

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