How does 2 different scanners saying the computer isn't commanding the upshift mean its the trans then?

 

Where in fl are you?

 

I'm in central..Daytona/Orlando area. Like I said my trans guy who I just paid $1500 for a rebuild is telling me he's "100% sure it's not a trans problem because the computer isnt commanding the shift, my tuner who i just paid for a retune is telling me he's 100% positive it's not his tune. I know it can't be in the tune, because it's not upshifted with 3 different tunes(original tune later, re tune and stock tune)it being something in the trans I don't know.

 

I dont personally know of any one in that area.... Wish I could help more. If you were closer I would help out. Sounds like you have narrowed it down yourself. 3 Tunes Different people. Def a trans issue.

 

If it is something in the trans the problem is I have to convince the builder to fix it under warranty.

 

Thanks gonna call them tomorrow see what they say.

 

Does your speedo read correct with this pcm?

 

No it does not! I went for a drive today and with my iphone speedometer app..the app says 65 and speedometer says 80 same as with my tuned pcm. Cars are really passing me while speedo says 80 and the app is dead on with my corvettes speedo. As speed increases the more off it is. When I originally drove my car out of the trans shop I only drove about 20 miles and drove on the street I didn't notice the speedometer was off. I then parked the car removed my pcm and sent it out for the tune...when I got the pcm back is when I noticed it so I automatically assumed the tuner screwed something up. That being the case could this be the VSS and will it fix it if I get a new one?

 

Told ya it was in your tune lol... get it to a good tune

 

Huh? How does that make it the tune and not the vehicle speed sensor?

 

If it is reading any speed then the speed sensor is working. Its in the tune has always been. Get it tuned right

 

Well you're right about one thing...it wasn't the VSS I changed it speedo is still reading 15mph high at 65. How is the stock pcm going to throw my speedometer off 15 mph? Tee speedometer being off is more than likely my problem of why the car is not shifting at WOT

 

Get a new tuner.

 

Thanks but what is your reasoning I need a new tuner? I've had 3 different tunes, 2 pcm's, and a new Vehicle speed sensor and my speedometer is still off.

 

Some one is not adjusting the tables right.
The tire size, and rear gears. All Needs to match the mph numbers in the wot tables. Also the command rpm wot shift needs to be reached as well. If it was ttuned to shift at 6500 and say 47mph with 3.73 gears and a 26" tire. And you change the gear or tire. All the values won't add up. In order for it to shift wot from 1-2 or 2-3 all areas need to be reached.

 

Can you post your tune?
(I'm on my phone so I don't get to see the normal version of ls1tech)

 

Yes I know this but how does explain the fact the speedometer was correct and the wot shift occurred for almost 2 years with a tune then all of a sudden didn't? How can the tables be right then all of a sudden aren't? Then retuned to correct problem and doesn't?Then a stock untuned pcm swapped and the speedometer(and wot shift) is still incorrect, and I have stock 3.23 gears. This is why everyone keeps telling me it's the tune(except the tuner) and I say how can that be?

 

For the people here on ls1tech to say if its in the tune or not we need to see the file. Untill you can post the file all we can do is point fingers

 

Unsubscribed lol... he don't listen to ppl... its no use in trying to give this guy advise.... I say sell the car man.... trans is fd up..... tune is fd up... just sell it... I will give you 500 for it

 

Don't have the tune file..I sent it to pcmforless. Whatever the tune file is for a stock pcm that's what I have also...speedo is off 15mph at 80 with that one too.