Also known as the VSSB (Vehicle Speed Sensor Buffer) or DRAC (Digital Ratio Adapter Computer), this module matches your speedometer to changes in differential ratio and/or tire size.
Currently in-stock for 2.56 and 2.73 differentials with 40" or 42" tires.
Custom combinations available, contact us for details.
Plug-in replacement for OEM adapter. Fits 1994 - 2003 Hummer / H1.