Home » Public Forums » GMCnet » [GMCnet] ride height adjustment
| Re: [GMCnet] Ride Height Adjustment [message #88022 is a reply to message #87916] |
Fri, 11 June 2010 00:30   |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma:
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Senior Member |
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| kenneth hugelier wrote on Thu, 10 June 2010 08:10 |
I think it was within the last week or two, someone posted a statement indicating how many turns on the torsion bar adjuster equaled one inch movement in the coach height. I thought it was in the "Why is the front ride higher than the rear of my GMC" thread, but I could not find it in the archives.
Ken B.- A friend of mine has a tire/front end shop not far from me with a pit. I will go there and lower the front end a bit using your suggestion of equal turns on each side. The above requested info will just save a little time. I'm wondering if the "lumpy" feeling I get on take off could be the CV joints attempting to wear in to a new grove due to the new height setting?
I have not heard from anyone else who's coach height was adjusted at Hamilton, you?
ken hugelier 77 PB Det. Mich.
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Byron said he was very happy with his. Also Chuck said he was happy with his that we did a week earlier at Bean Station. I came home and did mine. It turned out mine was low all the way around. After adjusting the rears to the exact correct height, (The rears were 3/4 low before I started), the fronts were also correct. So no front adjustment was done to my fronts. I'm happy with mine.
What bothers me about this whole discussion is the talk about level axles in front. If they are indeed suppose to be level then the numbers in the GMC manual are way off when using the 2.25x75 R16's even though the revolutions per mile and tire heights are almost exactly the same.
I wish we could find some GM authoritative source that said that the front axles should be level. Another possibility would be to find someone with 16.5 bias ply tires that have their front ride height set correctly to the book specs. Then we could put a level on their axles and verify if they are suppose to be level. Good luck on finding that one.
If you want to try level axles then I would drop the front (equally) until they are level. Then I would measure the amount of drop from book spec. Then I would reduce the rears by that same amount drop. I have no idea how much that would be.
I measured one of the coach's axles with a level at Hamilton. I do not remember which one it was. On that coach the axles were nowhere near level even though the front ride heights were correct by the book.
Please let me know what you do and how it works out. I am very interested in your results.
Note:
I used 65 PSI all the way around when checked mine. I usually run 65 front and about 60 in the rears. I go to 65 rear when I hang my 500 pound motorcycle on my rear Blaine Merrell through the bumper trailer hitch.
Please let me know what do and what happens.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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