Quote:
Originally Posted by 1968CHEVYC10
In 2007 GM switched all of their 1/2 ton trucks back to rear drums, wonder if emission requirements had anything to do with it.
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It was before 07... we have an 05 at work with drums.
Regardless, brakes have nothing to do with smog requirements.
There are a few reasons to do this;
1 Better parking brake
2 last longer with far fewer service intervals (100k out of rear drums with zero maintenance is common)
3 less drag which equals better MPG.
4 cheaper
5 less weight (even better MPG, but fractions of a MPG)
The MPG thing is a huge one, being that GM (and all other auto makers) need to meet CAFE requirements. So even a .25 MPG increase is a huge thing for them to meet the requirements put on them by the feds.