For the past couple of months, the fuel tank on my KJ overflows regardless of gas station or pump. Any ideas on how to make it shut the pump off as designed?

Are you inserting the nozzle completely into the fill neck? Do you always squeeze the handle on the nozzle completely to obtain maximum flow-rate? There's really nothing you can do to the Jeep to make the pump shut off - this is a design in the pump nozzle. Although, on second thought, it may be possible that your fill neck is damaged or bent...so many possibilities here and questions to ask...ever have any work done on the gas tank that necessitated it's removal?

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2003 Renegade 4X4 5-Speed, Bright Silver *TRADED for 2013 Wrangler*
PIAA 520 Auxiliary Lights
Garmin GPSMAP 76S
DynoMax Ultra Flow SS Muffler
Amsoil Ea "Absolute Efficiency" Air Filter
Nokian Vatiiva 235/70/R16 Tires
Pixeldzn's "RENEGADE" decals
Support the 2nd Amendment - It's your right!

Mine only overflows when I fill my tank all the way. It gushes out just a bit but eventually stops. I since have stopped filling up to the max and only fill up a certain amount.

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2005 Jeep Liberty Renegade 4X4 - Auto - Off Road Package
Pennzoil Platinum Synthetic Motor Oil
General Grabber HTS 235/70/16
Flowmaster Series 40 Delta Flow Exhaust cat-back system
K&N 63 Series Aircharger Intake Kit
Bosch Platinum Ir Fusion Spark Plugs
Hella 500FF Free-Form Fog Lamp Kit
Sony Xplod CDX-GT620IP Head Unit w/Sony Xplod Speakers

Never had the gas tank removed. I have had the KJ for five years and never had this problem until the past couple of months. I don't think the pump is the culprit I have tried different pumps from different gas stations. Also, my other vehicle does not have this problem from the same pumps.