It was finally time to get the chassis moved off the mockup axles. Decided it needed some wpl 'potmetal' axles, and might as well get a set of brass Differentials instead of the steel Spools those come with. My thinking was that a Box truck probably needs turning radius more than 4 wheel traction or durability.
Get in the zone, Advance toy parts
Oh oh oh, oh Napa.
We didn't need liftgate service, so they were willing to send a parts-runner out to the garage.
These brass Differentials felt crunchy, so i spent a while pushing inward on axles while rotating to help wear in the gears. I plan to run them for a while, then open to clean and lube. Everything needs to come apart for threadlock once it's more final anyway, so that shouldn't be a problem.
To make up for the larger housings for spiders, these diffs come with a shorter pinion than used on wpl spools.
---
I've been looking for a D-wheel dually conversion rim with the convex face.
Chevy and GMC grille
https://www.etsy.com/listing/1599115...original-style
https://cults3d.com/en/3d-model/gadg...conversion-kit
https://makerworld.com/en/models/374...42?from=search
Rally wheel center in d12 structure
https://youtu.be/l5PnA-2UCSM?feature=shared m2.5x20 hardware to stack wheels
https://www.thingiverse.com/thing:6174132 Squishy tire with d12 steelie profile wheel