In this episode of the Stay Tuned Podcast, Matt sits down with the team from JMACX for one of the most in-depth conversations ever recorded about suspension engineering, GVM upgrades, touring setups, and the truth behind industry misinformation.From toe-in and bump steer to multi-mapping, towing safety, compliance, and why so many modern 4WD builds perform poorly on the road — this episode cuts through the noise with real data, real testing, and real engineering.Whether you tow, tour, build for customers, or just want your 4WD to actually handle properly, this episode will change the way you think about suspension forever.

Topics Covered 

• Why misinformation in the 4WD industry is at an all-time high
• Understanding suspension geometry: toe, caster, bump steer & track width
• The truth about GVM upgrades — and why some are unsafe
• Airbags, coils, leaf springs: pros, cons & the right applications
• Why weight distribution matters more than people realise
• How towing changes your entire suspension behaviour
• Multi-mapping, throttle behaviour & tuning logic
• Why “bigger” isn’t always “better” in touring setups
• JMACX’s testing process — on-road, off-road & engineering validation
• How to build a 4WD that handles properly and safely