speedometer calibration
Thread Starter
Racer
Joined: Sep 2016
Posts: 251
Likes: 102
From: O'Neill (Home of St. Pat's Weekend) NE
speedometer calibration
First off 2002 vert auto I am just kicking around the idea of changing the diff ratio from 2.73 to 3.?? Was just wondering where or how to change the speedo so it would indicate correctly.
Thanks in advance
Thanks in advance
Drifting
Joined: Oct 2002
Posts: 1,773
Likes: 66
From: SoCal
No need to do anything with the speedo to read correctly. Gear change won't affect the speedometer reading. You will need to have your shift points adjusted by a tuner though. Those WILL be affected by the rear gear change.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The speedo signal comes from the Vehicle Speed Sensor (VSS) on the ring gear That signal is fed to the PCM and then digitally to the IPC (SPEEDOMETER)
RedRiderZR1 is 100% correct. If you have an A4, you will need a TUNER to set the shift points.
