Dodge Caravan

I have a 4 speed trans , FOR i AM TOLD THERE A 3 DIFFERENT TRANS FOR THE 3.0. IT HAS THE COOLANT HOSE CUT-OUT ON THE TOP OF THE BELL HOUSING. THE ID ON THE TRANS. READS K 304 3633 2420 (ON THE TOP OF THE TRANS W/ A SKU). wHAT IDENTIFIFIES THE DIFFENNT MODELS(PAN, ECT...?) tHANKS - sTEVE

There are 4 transaxles for a 3.0L van. They differ by the final ratio. I don't see the number you posted. If the trans is out of the van, you can get the number that is on the machined surface for the transfer gear cover. Facing the cover the numbers will be on the left towards the top just above a piece in the cover used to attach the harness. It is eched in with dots so it needs to be clean to read it.