mine does also, i thought that when i bought it from the dealership, they guy who owned it before me rolled back the milage or something and thats why there was dirt back there, and the fact that my milage numbers arnt all strait....On my car it was easy to remove the clear plastic but i havent takin my trucks out yet...probably will someday, but not now...im guessing you have the older guages that just have the speedo and battery and stuff on it, and your wanting a newwer one? with the tach on it? Im not sure what years will fit in yours...
2006 Jeep SRT-8 Grand Cherokee
K&N Intake, Magnaflow Exhaust, Eibach Lowering Kit, Custom Tunes, FRI Lilboy Cam 114 LSA