Central 20 - 3.9 Final Drive
#17
#19
#20
Originally Posted by skaterbasist
Speedometer is not going to be 10% off. That has nothing to do with it.
And I don't see how an ECU reflash would be beneficial toward the new FD.
.
I went with 4.10s in my mustang, never bothered to reflash the ecu, and was off by like 15%
#21
Originally Posted by 2EFNFAST
if the gearing is changed the speedo/odo isn't going to be right anymore.....I know some cars, for example, need a new speedo gear or else the speedo/odo will be off
I went with 4.10s in my mustang, never bothered to reflash the ecu, and was off by like 15%
I went with 4.10s in my mustang, never bothered to reflash the ecu, and was off by like 15%
.
#22
Join Date: Feb 2005
Posts: 103
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Originally Posted by 2EFNFAST
if the gearing is changed the speedo/odo isn't going to be right anymore.....I know some cars, for example, need a new speedo gear or else the speedo/odo will be off
I went with 4.10s in my mustang, never bothered to reflash the ecu, and was off by like 15%
I went with 4.10s in my mustang, never bothered to reflash the ecu, and was off by like 15%
#23
#27
#29