I may not have provided enough info. The comanchee is a 2wd. I'm pretty green to Jeeps, but looking at the receiver for the speedo hookup, there doesn't appear to be a gear to drive a mechanical one.
I have a 1988 Comanche that I'm converting the running gear to a 2004 grand cherokee running gear. The 2004 gear has electronic speedometer rather than a mechanical. Will the vdo 437-152 aftermarket speedometer work for me. Thanks.