Think we discussed this on another forum, but I missed that the A4 to M6 conversion was done with a 1993 donor. First, using Freescan or Tunercat is your speed reading corrrectly at the PCM ? If not Here is some info on VSS stuff for Chevy transmissions. Note the some of the '93 LT1's used an AC sine wave from the VSS where all the the '94 and up used a DC Pulse from the VSS also the '93 3.55 first gear T56 used a different reluctor 11 pulses/rev than the standard 17 pulses/rev. Not sure which '93 you used so could be the '95 PCM may not be reading the VSS if it's an AC sine wave. If so you may need to move the Dakota box to the T56 VSS output and set it to convert the AC signal to a 17 pulse/rev DC pulse to the PCM.
1. The two-pulse (2000 pulses per mile) square wave (D.C current or direct current) used on all TBI
engines thru 1992, all computer-controlled-carbureted engines, and on 1985-1989 TPI engines.
2. A four-pulse (4000 pulses per mile) sine-wave (A.C. current or alternating current) signal is
required by the 1990-1993 TPI, 1992-1993 LT1 engines, and 1990-1993 Camaro 3.1/3.4 V6
3. A 40 pulse per driveshaft revolution speed sensor used on 1993 and newer trucks with automatic
transmission, 1994 and newer rear drive cars with the automatic transmission
4. A 17 tooth per driveshaft revolution speed sensor used on 1993-1997 LT1 engines with the Borg-
Warner 6-speed transmission. An 11 tooth reluctor ring is used on 1993 LT1 engines with the
Borg-Warner wide ratio (3.35 First gear) 6-speed transmission.
I'm Bob.. 1994 Z28, A4, Stall, CAI, Cam, RR's, 342 rear, LT's , CatBack, Tuned
Last edited by bobdec; 09-07-2011 at 11:24 AM.