This topic is really referring to this thread.

http://forums.corvetteforum.com/c6-s...post1567823506

I swapped my rear end out for an 06+ and now my HUD and SPEEDO go ape ****. They ping up and down sometimes and occasionally stick to zero. My service column lock message also magically seems to not want to stop popping up.

What's the problem here? I'm told this is only an issue with 2005 corvettes that have an inferior computer/ECU. I think the post 2005 cars calculate speed differently in the rear end and supposedly the ECU on the 2005 cannot handle the change information or is possibly incompatible. What are my solutions, this issue is overwhelmingly annoying and I cannot believe the 2005 has these nutty issues.

What's the problem here, I need a solution like yesterday.

 

What was the car tuned with?

 

I believe HP tuners

 

Since it could be a software glitch, I'd start with checking their forum to see if anyone else describes a similar problem.

I'd also check with HP Tuners themselves, if thats what it was tuned with. There could be a patch or update available to address your issue.

 

Inferior? I love my VE table

 

The 05's E40 is the best of all years for tuning flexibility especially speed density. I'm not sure where you heard the opposite but I'm posting to stop that rumor before it continues. Just because the oldest C6 has hardware issues when it gets on in years doesnt mean the computer is to blame.

 

I also swapped out for the '06+ rear and have had no issues whatsoever, chech your tune and connections.

 

So what is it spin, why might my HUD be flipping out bounching randomly to zero mph sometimes. Why might my service column lock message keep coming up sometimes too? I was told the HUD bug, and speedo had something to do with the 05 ecu not being able to handle calculating speed with my new rear end.

 

I lost count how many 05's have 2006+ rears in them with no computer calculation issues. Its not the problem.

A wiring harness can have a million places for an intermittent issue. Swapping rear gears involves the disconnection of the wiring harness from the sensor. If its an exchange unit, you have someone else's sensor. With the enormous number of cars out there regeared without issue (my C6 2005 included....I have a C5 rear diff in my C6), the E40 has proven it has no issue with 'handling calculations' having to do with the speedo and HUD. Since you had no problems before your mod, the obvious issue is in the swap. I would swap the sensor on the top of the Diff or the cheap man's test......disconnect the connector and pop it right back on to see if its not clicked together properly.

Another simple thing to try is to drop the battery power to reset everything upon power up a minute later. Without fail, all the service column lock issues I saw were always related to battery issues including Aintqik's car who posted in this thread. His car was freaking out with 15 codes unrelated when his battery was about to give up the ghost.....all gone with a new battery including the CL solenoid freaking out. Swapping the battery isnt a bad idea on an 05. Even if it doesnt fix it, it eliminates the variable and you would have needed a battery soon anyway.

 

I've also seen people pince the rear wire harness when re-assembling. Might want to reach up there and check. If that's good and you are sure the wire by the torque tube is good then I'd start looking at other hardware items.

Might want to reflash the tune if you have HP.

 

So it's simply a sensor issue. I was put under the impression that my computer couldn't handle the calculations from the new rear end and that it was a much slower and less capable ecu so it couldn't read the amount of information sent to it or something. This column lock issue keeps returning, and my HUD issue has not been fixable for flat out months. Maybe you can give me a good place to go in Florida to get this dealt with it's driving me ****ing nuts and I don't have another 3+ months to wait for my car to sit in the same shop with no fix. You can tell the HUD and Speedo are glitched, they spin down to 0mph randomly at times and I can't stand it. My column lock issue is also a new issue, it decides to keep coming up and I have to hit reset. I just want to finish this, I was placed under the impression that the tuner needed to manually calculate how many times the wheel rotates etc and that there was some magical number to get my HUD to work again. I'm also given the impression that if I switch to wider tires or change my current tire/wheel spec my speedometer and HUD will once again read wrong. Basically the feeling i'm getting is that the 05 ecu and car is so outdated it's a flat out piece of **** and it makes me regret wasting my time modding this car. "Should have got an 08" .. yeah okay. Let me know.

 

Out of curiousity, what is the odometer doing?

Is it OK or is it on the blink along with the speedometer?

 

I think it's fine.