Living With the d46-170h Tandem Axle Setup

If you're spending twelve hours a day behind the wheel of a Class 8 rig, the d46-170h is likely something you don't think about much until it needs attention, but it's essentially the unsung hero sitting right beneath your fifth wheel. It's the kind of hardware that does the heavy lifting—literally—without asking for much credit. When you're pulling 80,000 pounds over a mountain pass in the middle of a winter storm, you want to know that your tandem axles aren't going to turn into a pile of metal shavings. That's exactly where this specific Dana Spicer/PACCAR setup earns its keep. ...

May 13, 2026 · 6 min · Chasty Carl