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| [GMCnet] torsion bar summary [message #157539] |
Sat, 21 January 2012 22:10  |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma:
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Senior Member |
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The following is a summary of information on issues with the Torsion Bars
in the GMC.
1 all of the available data says the torsion bar problems appear to be on
the driver side TBs.
2 All of the occurrences have happened on OEM front ends
3 *none* of the occurrences happened on " spacer or one-ton" front ends
(not the problem)
4 Our favorite SOB (SteveF) feels the problems occur because of worn
bushings allowing movement of the torsion bar, in the suspension.
5 there is no indication of a "fatigued" torsion bar being the root cause
of the problems, or even exists ( one did break)
6 universally the "pork chop" bolts on the driver side are not long enough,
(showing the problem, or a weight difference on all GMCs)
7 Our favorite SOB, feels that if you change the bushings, you have to
reinforce the TB socket and the lower control arms
8 since our favorite SOB, no longer rebuilds lower control arms (is this
true?), these 40 year old systems are at risk
9 the *future* path to solve this problem is to install the "available"
one-ton front end with all of the above done , plus all new parts(bearings,
bushings,cv joints, seals, boots, etc)
so
I am open to any *data* that seems to counter these assertions,
looking for new directions ( I am willing to be wrong;>)
gene
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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