The Stovebolt Site Forums The Parking Lot Big Bolts GM T170 2 Speed Differential Ring and Pinion Options?

That's exactly what I need-thank you!!

Edit to add.. can't seem to find any instances of this P/N in the wild, will have to call Weller in the morning. But wow, 3200RPM at 65mph sure sounds a lot quieter than over 3700.