oldmano2z

i'm having a heck of a time with my speedo swapped a4 to 6spd in my 02z28 and it runs at aprox. half speed . my tuner programmed my tire size,final gear ratio 6th gear of .5, and my rearend of 3:23 and said thats all he could do. i have a new sensor and am going to compare the readings between them before i take the old one out. help me you geniuses out there!!! could my two wires be swapped at the speedo sensor causing this problem?? help me help me ! this is my only problem on my engine/trans swap .thanks in advance folks..