4WD offers a variety of auto trans flexplates for automatic transmission and manual transmission Jeeps. Since the flexplate or flywheel delivers rotation power to the transmission, when the flexplate or flywheel cracks, it's often indicative of other issues. If these issues are overlooked or ignored, your Jeep may end up with transmission problems. So when replacing your flexplate or flywheel, be sure to look for missing dowel pins, a bent crackshaft or a leaking intake manifold. Your flexplate is a canary in your Jeep engine's coalmine so be sure to investigate all the issues that might be associated with it cracking.