I have a 2005 Limited CRD. Within the next 2 weeks my Daystar lift will be installed and new 245's sneakers as well. My problem is here in Maine, I have to carry a certificate stating that my speedometer has been re-calibrated for the over size tires. HELP...... I hear the a Jeep dealer can plug in and select the larger tire size and my local dealer has never heard of such a thing. I hear change a gear, but I believe it is electronic... Can anyone please enlighten me with the truth? Someone here has to have done this before.
Maine has soooooo many stupid laws on the books for a state that is over 90% uninhabited

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2005 CRD Limited with Select Trac
Bright Silver Metallic
Factory Skid Plates
Factory Towing
Scorpion Trail Stinger chip
"ORM"
RockFather II 2.5" lift
JBA's UCA
Firestone Discoverer M/T, 245/75R16 tires
Spidertrax 1.25" wheel spacers
Rear Sway Bar removed
Samco Hoses
K&N Filter
Yakima rack
Amsoil.

You better get another dealer.
Certificate huh?
Cops around here are to busy shooting themselves to worry about calibrated speedo's

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

You can follow my saga here http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=31789

In a nutshell, the 2005 liberty uses a electronic sensor on the rear axle that sends its signals to the BCM (Body Control Module). From there the speed signal is determined by the computer and output to the rest of the vehicle....unless you have ABS brakes. For a liberty with ABS (03 and up) the speed is determined from each of the individual wheel speed sensors.

In my case, I do not have ABS but the dealer swore I could not do it. It can be done see below:



Here is the excerpt out of a 2005 FSM. I don't know if it will work the same if you have ABS. Someone else will have to chime in on that one.

HTH

Ethan

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02 TJ Sport
1948 Willys CJ-2A
2005 Liberty Limited with OME Lift, ARB Bumper, and 235/75/17 Destination A/T's

I agree with fastrob, find another dealer (if you can). This should be a relatively simple item for a dealer to perform, plenty of folks here on the board have had their BCMs adjusted for larger tires. Of course since it's a Jeep will they even know it came with smaller tires to begin with?