re-program
Racer
Joined: Aug 2004
Posts: 438
Likes: 15
From: satellite beach fl
If an auto your shift points will be off. For an MN6 only the speedometer will be off. Most handheld tuners 3-4 hundred will handle that. The stealership can handle that if they have a good tech. Anybody with EFILive can handle it for the price of a license <100 bucks.
Safety Car
Joined: Aug 2000
Posts: 4,154
Likes: 1
From: Murphy TX
Cruise-In II Veteran
Originally Posted by purrvert
Anybody with EFILive can handle it for the price of a license <100 bucks.
Rsty, that's way more info than you deserve for having made me look at that pic in your profile.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by purrvert
If an auto your shift points will be off.
For an MN6 only the speedometer will be off.
no speedo error on any C5 when changing rear axle ratio.
RstyNutz; going from the 2.73 to 3.15 does give you one option - and that is you can get the reprog done by a Chevrolet dealer using their TechTool 2 (though it won't allow 3.42 or more radical for the A4). My local dealer will do the reprog for $65.
Last edited by Mike Mercury; Feb 22, 2006 at 09:08 PM.
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Originally Posted by ToplessTexan
Or for free since you're an early car.
Rsty, that's way more info than you deserve for having made me look at that pic in your profile.
Rsty, that's way more info than you deserve for having made me look at that pic in your profile.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by Mike Mercury
and you'll eventually set the P1870 error code and the trannhy will go into the limp mode.
not correct.
no speedo error on any C5 when changing rear axle ratio.
RstyNutz; going from the 2.73 to 3.15 does give you one option - and that is you can get the reprog done by a Chevrolet dealer using their TechTool 2 (though it won't allow 3.42 or more radical for the A4). My local dealer will do the reprog for $65.
not correct.
no speedo error on any C5 when changing rear axle ratio.
RstyNutz; going from the 2.73 to 3.15 does give you one option - and that is you can get the reprog done by a Chevrolet dealer using their TechTool 2 (though it won't allow 3.42 or more radical for the A4). My local dealer will do the reprog for $65.
The speedo is on the wheel sensors is what I was told...so no error.
I have it all settled. The place I'm having it installed at will reprogram it for me. I thought of the dealer..BUT was affraid they would reflash the tune.
Rsty
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by ToplessTexan
Or for free since you're an early car.
Rsty, that's way more info than you deserve for having made me look at that pic in your profile.
Rsty, that's way more info than you deserve for having made me look at that pic in your profile.
my altered ego 
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Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Originally Posted by purrvert
If an auto your shift points will be off. For an MN6 only the speedometer will be off. Most handheld tuners 3-4 hundred will handle that. The stealership can handle that if they have a good tech. Anybody with EFILive can handle it for the price of a license <100 bucks.
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Originally Posted by RstyNutz
Thank you Mike.
The speedo is on the wheel sensors is what I was told...so no error.
I have it all settled. The place I'm having it installed at will reprogram it for me. I thought of the dealer..BUT was affraid they would reflash the tune.
Rsty
The speedo is on the wheel sensors is what I was told...so no error.
I have it all settled. The place I'm having it installed at will reprogram it for me. I thought of the dealer..BUT was affraid they would reflash the tune.
Rsty
The speed sensor is a reluctor wheel that is attached to the ring gear in the differential. So, no matter what gear you install the speedometer will always be correct. However, since the trans with your new gear, will be turning faster than the PCM expects, the PCM sees that as slipping and goes into limp mode. Your shift points will also be off. The tuning tools are formulated to take the new gear information and input new parameters for the PCM to see. Have fun with the new gear.
Joe
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by gojo
Rsty,
The speed sensor is a reluctor wheel that is attached to the ring gear in the differential. So, no matter what gear you install the speedometer will always be correct. However, since the trans with your new gear, will be turning faster than the PCM expects, the PCM sees that as slipping and goes into limp mode. Your shift points will also be off. The tuning tools are formulated to take the new gear information and input new parameters for the PCM to see. Have fun with the new gear.
Joe
The speed sensor is a reluctor wheel that is attached to the ring gear in the differential. So, no matter what gear you install the speedometer will always be correct. However, since the trans with your new gear, will be turning faster than the PCM expects, the PCM sees that as slipping and goes into limp mode. Your shift points will also be off. The tuning tools are formulated to take the new gear information and input new parameters for the PCM to see. Have fun with the new gear.
Joe
Former Law Dawg Moderator
Joined: Jan 2005
Posts: 29,434
Likes: 96
From: Eads, Tennessee
CF St. Jude Co-Organizer
St. Jude Donor '05 thru '24
So what if one goes from a 2.72 to 3.42 with an A4? What program could I use to reprogram? I checked with the dealersh!t and they said they could not do it. Where now?
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by Tact
So what if one goes from a 2.72 to 3.42 with an A4? What program could I use to reprogram? I checked with the dealersh!t and they said they could not do it. Where now?
*you could purchase LS1Edit yourself
*you could purchase a Predator handheld programmer (will not work on 1997 and 1998 C5's though)
Former Law Dawg Moderator
Joined: Jan 2005
Posts: 29,434
Likes: 96
From: Eads, Tennessee
CF St. Jude Co-Organizer
St. Jude Donor '05 thru '24
Originally Posted by Mike Mercury
*you could go to a speed shop that has LS1Edit or other reprogramming setups and have them do it for you.
*you could purchase LS1Edit yourself
*you could purchase a Predator handheld programmer (will not work on 1997 and 1998 C5's though)
*you could purchase LS1Edit yourself
*you could purchase a Predator handheld programmer (will not work on 1997 and 1998 C5's though)
