Jet Performance Scu-2000?

[DA BIG ONE]

Went from 4.10:1 to 3.42:1 gearsets, since the change I've had an ongoing problem with tranny shift/lockup points after jumping VSSB to correct speedo, doing more research I find that the signal from the VSS needs to be modified to the VSSB to correct this shift/lockup issue w/VSSB settings left at what they were for the "4.10" gearsets.

Question is: Have any of you used Jet Performance SCU-2000 successfully on any post 96 6.4td 4wd K2500 trucks?