Tech II programming ability...
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
Tech II programming ability...
Quick question guys...since the 3.15:1 gear ratio is a factory option can the broadcast codes for it be changed with a Tech II handheld?
I ask because the tuner who dynotuned my vehicle no longer works in this state and I'm looking into a rear gear swap for my A4 C5...
I ask because the tuner who dynotuned my vehicle no longer works in this state and I'm looking into a rear gear swap for my A4 C5...
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
If your going to the trouble to change the axle ratio why just go to the 3.15?
You'll barely notice the difference, step up to the 3.42 and then you'll have something.
BTW, what will need to to be changed is the shift points and that can be done by anyone with tuning software.
Tech 2's are very limited to what they can do for a permanent change.
You'll barely notice the difference, step up to the 3.42 and then you'll have something.
BTW, what will need to to be changed is the shift points and that can be done by anyone with tuning software.
Tech 2's are very limited to what they can do for a permanent change.
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
Thanks for the response guys...
The reason I'm asking is the car has already been dyno tuned by a professional tuner but he moved out of state and the only mod this time is the differential. If the Tech II can change the broadcast code and thus the programming of that one item it would be ideal...no retune or other hassles.
Oh, and I'm going with 3.15:1 gears because I'm getting the differential in trade for something.
So, does anyone know if the Tech II can perform the task?
The reason I'm asking is the car has already been dyno tuned by a professional tuner but he moved out of state and the only mod this time is the differential. If the Tech II can change the broadcast code and thus the programming of that one item it would be ideal...no retune or other hassles.
Oh, and I'm going with 3.15:1 gears because I'm getting the differential in trade for something.
So, does anyone know if the Tech II can perform the task?
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Thanks for the response guys...
The reason I'm asking is the car has already been dyno tuned by a professional tuner but he moved out of state and the only mod this time is the differential. If the Tech II can change the broadcast code and thus the programming of that one item it would be ideal...no retune or other hassles.
Oh, and I'm going with 3.15:1 gears because I'm getting the differential in trade for something.
So, does anyone know if the Tech II can perform the task?
The reason I'm asking is the car has already been dyno tuned by a professional tuner but he moved out of state and the only mod this time is the differential. If the Tech II can change the broadcast code and thus the programming of that one item it would be ideal...no retune or other hassles.
Oh, and I'm going with 3.15:1 gears because I'm getting the differential in trade for something.
So, does anyone know if the Tech II can perform the task?
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
Now that I've explained in depth what I'm looking for...can anyone tell me if it is possible? Thanks again all who have offered assistance so far...
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Ok, I think I'm not "expressing" myself correctly. My understanding is the factory C5's came with both 2.73 and 3.15 rear differential options and thus have BOTH shift tables programmed as OEM shift tables. The difference is in the PCM programming broadcast code for either one. I was told since it is ALREADY in there for these two optioned differential ratios ONLY that the Tech II could program the change.
Now that I've explained in depth what I'm looking for...can anyone tell me if it is possible? Thanks again all who have offered assistance so far...
Now that I've explained in depth what I'm looking for...can anyone tell me if it is possible? Thanks again all who have offered assistance so far...
The dealer calls in to a data base using the VIN# to reprogram the car so I'm not sure what they do when equipment changes.
The Tech2's for non GM Dealership guys is mainly for diagnosing and repairing problems, not programming, except for RPO codes to the BCM.
Hope that helps
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
I'm not sure the average home user could not do it, but a dealer could. I have a Tech2, but have never used it for that purpose.
The dealer calls in to a data base using the VIN# to reprogram the car so I'm not sure what they do when equipment changes.
The Tech2's for non GM Dealership guys is mainly for diagnosing and repairing problems, not programming, except for RPO codes to the BCM.
Hope that helps
The dealer calls in to a data base using the VIN# to reprogram the car so I'm not sure what they do when equipment changes.
The Tech2's for non GM Dealership guys is mainly for diagnosing and repairing problems, not programming, except for RPO codes to the BCM.
Hope that helps
Thanks AJG!
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Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
The Tech II will only program to your vin #.
So unless your car came with a 3.15 axle no it won't make the change, it can be done with some handheld programers for 99 and up MY's.
Otherwise you need tuning software to change the PCM.
So unless your car came with a 3.15 axle no it won't make the change, it can be done with some handheld programers for 99 and up MY's.
Otherwise you need tuning software to change the PCM.
