I have had my gryphon for almost a year what a great investment, I just did a leveling kit and some 35 inch tires and wanted to adjust for my speedo but when I go into that option I get an error message that it requires an update or something like that.

Is there a way to fix this myself or do I need new custom tunes?

 

Just go on there website and update the unit like it says.

 

Thats what I thought but I was worried I might loose my custom tunes if I download an update

 

I would talk to Bill before updating anything. I would not risk wiping out the custom tune.

 

Ya better to be safe than sorry cause I dont think I could drive without my Gryphon. I'll give them a call tommorow or if anyone knows the right answer let me know.

 

Please include your year make and model when asking questions about your truck.

I was told that tire size could not be calibrated through the computer till 99 ym. So, without knowing the info above, you can get the wrong info... To make it easier, just go and update your profile info and it will automatically post in the top right corner.

Good Luck!

 

2004 Supercrew 5.4L

 

Heres a link to php where it talks about getting the calibrations rebuilt to use the update on the 2004-2008 trucks. http://dygytalworld.ehost-services13...read.php?t=324

 

Thanx for the info this is exactly what I needed.

 

can anybody tell me how to allow for this "squish factor" I will be trying to calculate for 35x12.5 R20's

 

Squish depends on how stiff the sidewalls are. It ranges from 3% to 5%, generally. do the farmula and multiply the result by 95% and start there.