i have an older superchips programmer,i have it to prog my 01 supercrew for larger tires,i have it set for a 32.75" or a 305,my rearend was re-geared to 4.10,but my speedo is off by 12mph,and my odo is reading way too many miles.has anyone else had this problem? Should i just buy a new programmer or is there a way to get this straight/

 

Hello sir & Welcome.

I'm here to try & help you. Please forgive my old decrepit carcass if I am unable to answer yer question. Thanks.

OK - I'm gonna ssume it's a Max Microtuner #1715, judging by yer MY truck.

Here is the Tire size info from the manual:

Editing the Tire Height Option Setting
The Tire Height Option allows the user to correct the Speedometer/Odometer when other
than stock tires are installed. The Tire Height Option allows the user to set the Tire Height
to STOCK or 24.0 - 38.0 inches in 1/4-inch intervals. Tire height should be measured from
the top of the tire at its highest point to the ground.

The MAX MicroTuner will beep and display the message:

TIRE Height:
xx.xx

The present Tire Height setting is displayed. Use ‘<’ or ‘>’ to change the Tire Height setting
and ‘YES’ to save the Tire Height Custom Option setting. The STOCK tire size setting is
selected by pressing ‘<’ when the 24.00 tire height is displayed.

Note: The Tire Height Option is NOT supported for all vehicles.

And - here is the Gear Ratio info:

Editing the Gear Size Option Setting
The Gear Size Option allows the MAX Tuner to match the transmission Shift Points to the
selected Gear Size. It also corrects the Speedometer/Odometer when other than STOCK
Gears are installed. The Gear Size Option allows you to set the Gear Size to STOCK or
one of the following options:

2.73, 3.08, 3.27, 3.31, 3.55, 3.73, 4.10, 4.56

Note: The Gear Size Option is NOT supported for all vehicles.

The MAX MicroTuner will beep and display the message:

Set GEAR Size:
xxx (xxx is Stock or the Gear Size)

The present Gear Size setting flashes. Use ‘<’ or ‘>’ to change the Gear Size setting and
‘YES’ to save the Gear Size Custom Option setting. Pressing ‘<’ key when the lowest gear
ratio is displayed will select the STOCK gear setting.
---------------------------------------------------------------

Full manual is here:

http://www.tycomm.net/dragonautomoti...ion_manual.pdf

Give that a shot & post back.

Good luck!

Cheers
MGD v3.0