For those running the older 4L60 trans on their LS swap

[Mickeymotormount]

Interesting. Not sure why my initial parallel wiring of the VSSB and PCM didn't work. After doing some research, I found out exactly what 'Jay had said. The new PCM does all the deciphering so I wired the speedo directly from the new PCM. My cruise control still functions although I feel the my rear ABS has have been compromised by eliiminating the DRAC/VSSB box.

[bobbylog]

Don't want to hack the thread but does some of you know how to wire my rear ABS? According to LT1SWAP the my 2005 PCM output 129K mille on the PIN 49 and

Digital Ration Adapter Controller (DRAC) and Vehicle Speed Sensor Buffer (VSSB) are both electronic devices that simply convert the input AC signal (from the VSS) to a calibrated digital DC signal. The DRAC sends 2,000 digital pulses per mile to the ECM (Electronic Control Module), 4,000 digital pulses per mile to the cruise control module, and 128,000 digital pulses per mile to the ABS (Anti-Lock Brake) computer. The DRAC and VSSB units are pre-calibrated from the factory according to the vehicle's stock gear ratio, and tire size. But, it can be re-calibrated by simply moving jumpers around. 1990-1991 vehicles should have the DRAC, and 1992-1995 vehicles should have the VSSB unit. The main difference between the DRAC unit and the VSSB unit (from what I can tell) is that the VSSB unit has an extra "bank" of 7 jumpers in addition to the same bank of 7 jumpers that the DRAC unit has. I would assume this extra bank of jumpers is for the electronically controlled transmission that GM started using in 1992.

(from TBICHIP.com)



Do you think if I wire the pin 49 green connector to the white wire (D)going to the ABS module on the diagram if it will work?
Thanks