Thanks for posting. Let us know if you feel any change in the suspension after the install. I can only assume the FEA bushings use a stiffer rubber. The FE4 ride link bushings are the only ones that appear different among all 4 pairs of part numbers, for what it's worth.
In some ZL1 1LE marketing GM claims the FEA suspension uses stiffer ball joints, so that's a probability that's hidden underneath the weather boots.
Quote:
Originally Posted by sadpanda
If there is no difference in arm thickness then I'm going to guess there is no difference. Only possibility would be different durometer rubber bushing or briefer ball joint... But I doubt it.
As we've discussed, different part numbers ! = different parts
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Let's not jump to conclusions until we can prove it.
Think about it from a suspension tuning standpoint. The FE2 comes with 245 section all-season tires, and the FEA comes with 305 & 325 wide R-compound tires. There isn't a rational reason to run the same bushings as the deflections and subsequent dynamic alignments would be significantly different between the two. As a rule of thumb, the greater the tire grip, the stiffer you need the bushings to be. Conversely it's nonsensical (and a waste of money and lack of durability) to run sphercial-bearings on narrow all-seasons as the precision movement is made moot by the large tread squirm. GM may be using the same molds on some bushings but it would be naive to assume they're the same durometer for such a huge span of performance characteristics.