I have a 99 Durango 4x4 with the 44re tranny federal emmisions and my VIN is 1B4HS28Y8XF520521. Can anybody tell me the Part # of my pcm. My label wore off so im not sure. I thought it either ended in AA or AD.

 

Part number should be 56040106AE, There is a new number R6040106AH which is a reman number.

 

If you have the rest of the part number, the AA or AD doesn't matter.

AA to AD just means the SAME part was made by 4 vendors. AA to AB to AC to AD.

If a part number goes from 23455AA to 23455BA then the part has a revision from the same vendor.

Etc etc etc

 

Thanks for that info guys. Good to know.