Newer Mopar Harmonic Balancers Not the Same As Older Units

I have run across something you all will need to know 
sooner or later. When your 4.0L needs a replacement crank 
damper due to seperation if you get a factory replacement 
(Mopar) one at the dealer you will find that it won't go 
on the crank all the way. The old part number (33002920) 
supercedes to the one (33002920AB) used on 2001 and newer 
4.0L's. To use this new damper on 87-00 4.0L's you will 
have to remove the oil slinger (eliminated on 2001 4.0L's) 
on the crank timing chain gear which requires removing the 
timing cover.

Now the only direct replacement ones are aftermarket at 
places like Pep Boys. Make a note of this if you plan on 
using a factory one.