Here is the Motor Trend article about the IRS. There is no added arm. Like I mentioned they made a more trailing style arm. And of course the engineer will say theirs is the best. But ride and comfort is not the same to everyone. BAJA racers have tried every suspension design out there and wheel travel is wheel travel. They try to minimize negative camber changes, tire scrub and toe changes. But everything moves in an arch so there is nothing really new. Air bags are a plus IMO. Maybe not having the axles through the frame will let them lift it 6”. I’m all about that. Still waiting on tow numbers. That and the EcoBoost are the only reasons I picked the Expy. 6.6 Duramax in the Tahoe I would trade for it today.
https://www.google.com/amp/s/www.mo...uts-job-line-independent-rear-suspension/amp/
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https://www.google.com/amp/s/www.mo...uts-job-line-independent-rear-suspension/amp/
Sent from my iPhone using Tapatalk