ssteven

iTrader: (6)

My rear broke bigtime. I have 3.73 A4. funds are tight so i found a complete rear end with 2,73s. I will need to drive it for a week until i get the pcm reflashed. How many mph will speedo be off? higher or lower? I know shift points will be off.

murphinator

iTrader: (2)

it will be off around 25% , I would be most concerned with whether rpm and mph will be met to initiate shifts in the tune thats a big gear change to expect the tune to absorb , it would suck to have to add a trans to your budget...

1981TA

iTrader: (7)

...and may also put you firmly in "ticket territory" if you don't pay attention. When your speedo says 65, you'll be over 80.

FirstYrLS1Z

iTrader: (4)

65 speedometer indicated speed will be 89 actual speed.
47 speedometer indicated speed will be 65 actual speed.

Use a GPS unit to determine actual speed.

ssteven

iTrader: (6)

If it works out I will only have to drive it maybe 1-2 days.Thanks