C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Speedometer calibration after gear change

Thread Tools
 
Search this Thread
 
Old Dec 25, 2010 | 09:18 AM
  #1  
Boomer111's Avatar
Boomer111
Thread Starter
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default Speedometer calibration after gear change

I understand it is not need for the C6.

I was asked why by a friend and I did not have a complete answer.

How does this correction work.

Merry Christmas to all.
Reply
Old Dec 25, 2010 | 09:41 AM
  #2  
haljensen's Avatar
haljensen
Race Director
Supporting Lifetime
 
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Default

Originally Posted by Boomer111
I understand it is not need for the C6.

I was asked why by a friend and I did not have a complete answer.

How does this correction work.

Merry Christmas to all.
The speedometer sending unit is electronic. The sensor for the speedometer is in the ring gear, when you change ring gears you effectively change your speedometer. Doesn't work for tire size changes, just for differentials that have the sensor.
Reply
Old Dec 25, 2010 | 09:59 AM
  #3  
Boomer111's Avatar
Boomer111
Thread Starter
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default

Thanks, I'll see if this answers his question fully enough. It is good enough for me!!
Reply
Old Dec 26, 2010 | 09:19 PM
  #4  
Gearhead Jim's Avatar
Gearhead Jim
Team Owner
Supporting Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Default

Originally Posted by haljensen
The speedometer sending unit is electronic. The sensor for the speedometer is in the ring gear, when you change ring gears you effectively change your speedometer. Doesn't work for tire size changes, just for differentials that have the sensor.
Someone posted that this is true for the manual transmission, but not the automatics.

No personal experience here.
Reply
Old Dec 27, 2010 | 09:08 AM
  #5  
Boomer111's Avatar
Boomer111
Thread Starter
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default

Originally Posted by Gearhead Jim
Someone posted that this is true for the manual transmission, but not the automatics.

No personal experience here.
Works for me I have a manual transmission.
Reply
Old Dec 27, 2010 | 08:24 PM
  #6  
Gearhead Jim's Avatar
Gearhead Jim
Team Owner
Supporting Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Default

Originally Posted by Boomer111
Works for me I have a manual transmission.
Reply
Old Dec 28, 2010 | 01:51 AM
  #7  
Paratrooper307's Avatar
Paratrooper307
Racer
10 Year Member
 
Joined: Aug 2008
Posts: 497
Likes: 21
From: Garner NC
Default

Automatics have to be reprogrammed. Manuals require no mods.
Reply
Old Dec 28, 2010 | 08:53 AM
  #8  
Ragtop 99's Avatar
Ragtop 99
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2007
Posts: 4,537
Likes: 1,403
From: Bethesda MD
Default

Originally Posted by Paratrooper307
Automatics have to be reprogrammed. Manuals generally require no mods.
Fixed.

There have been a few of us that had an issue with the speedo being off by 5% after the swap. I had to use HPT to get my speedo accurate.
Reply

Get notified of new replies

To Speedometer calibration after gear change





All times are GMT -4. The time now is 04:25 PM.