Following on from this issue being raised on the 'What did you do to your GMT400 today?' thread - which trucks got rear sway bars (ARBs this side of the pond) and didn't - and why?
So far it seems that most Suburbans got them (but not my C2500 and another member's C1500) and I can see why they would - heavier at the rear and that weight higher up - than with a pick up. Theoretically a rear bar should permit softer main springs (to the benefit of passenger comfort) another reason to fit them to a longroof at the rear.
Did the Ks get them - 4WD can better spread its roll stiffness as it has an inherent traction advantage (that a sway bar on a driven axle compromises)? Or not fitted to a K so as not to compromise traction where it was denoted a pre-requisite by the customer by choosing 4WD?
On trucks that didn't get a rear bar - do they have a stiffer front bar or otherwise different springs rates front and back (or both)?
Were they in all cases an option - or some rolled off the line with them as standard? (Seems odd to me that only some axles have the required brackets - kinda says the decision to fit or not fit was made quite early on the production line).
So far it seems that most Suburbans got them (but not my C2500 and another member's C1500) and I can see why they would - heavier at the rear and that weight higher up - than with a pick up. Theoretically a rear bar should permit softer main springs (to the benefit of passenger comfort) another reason to fit them to a longroof at the rear.
Did the Ks get them - 4WD can better spread its roll stiffness as it has an inherent traction advantage (that a sway bar on a driven axle compromises)? Or not fitted to a K so as not to compromise traction where it was denoted a pre-requisite by the customer by choosing 4WD?
On trucks that didn't get a rear bar - do they have a stiffer front bar or otherwise different springs rates front and back (or both)?
Were they in all cases an option - or some rolled off the line with them as standard? (Seems odd to me that only some axles have the required brackets - kinda says the decision to fit or not fit was made quite early on the production line).
