My 2004, 6.0 4x4 SMB's Speedo does not register properly in 4 Lo. The speed is approximatley off by the gear ratio of the Atlas Transfer Case. Anyone figured out to how make the speed and I assume odometer work in 4 Low?
It's not going to happen. The van doesn't have the software capability of knowing lo range and correcting the speedo for it.
One of the disadvantages of a non-factory conversion. I guess a non-factory conversion could be made to work if the factory had a true 4wd model that the software/hardware could be borrowed from, but they don't and you can't.
Ok, maybe you could. But I don't think any of us could afford the costs.
SOLD04 EB350 Custom Floorplan
6.0 PSD 4.10 Posi
Salem Kroger coil spring 4wd
SMB Trailer w/AT Air Suspension
Alaska to Key West, Labrador and more
130685 miles 16.65 mpg average
Prostate cancer survivor. viewtopic.php?f=8&t=11099
2015 VW GTI
Leaving CA for WA
IIRC, the speedo is driven off a speedo gear attached to the transfer case. So you can either have it be accurate in Hi or Low, but not both. And yes, it will throw off your odometer, so you can't trust the "bear left after 4.6 miles" directions you get from your friends.
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
QuadVan told me I can connect 4wd-low input under the hood (with the PTO/CTO wires) to the transfer case (will be electronic) and my speedo will be accurate in low range. Maybe diesels don't have that input?