This swap should work on all 1997 to 2006 Jeep Wrangler TJs with the 4.0 engine. I don't know about the 4 cylinder engines however. What you'll need is the alternator from a 2001-2006 Dodge Durango 4.7L V8 or the 2004 Dodge Durango 3.7L. Those models have the 160 amp alternator that will work with our TJs, and give you the extra power you're looking for.
The part number for the alternator you'll need is 56029914AA. Both alternators will work, and both are 160 amp. Why they have different part numbers are beyond me, but they are both confirmed as working.
Here's a brief overview of the install:
1) Disconnect the positive and negative battery terminals first, then the alternator power cable and electrical plug.
2) Using a serpentine belt tool or a breaker bar in my case, remove the serpentine belt.
3) Remove the two bolts that hold the alternator in place and remove factory alternator.
4) Install the 160 amp alternator; it took some finessing and patients to get the alternator in. I ended up having the file some of the factory alternator bracket in order for the new one to fit. Be patient and take your time, you don’t want to damage your new alternator.
*NOTE* The Durango alternator has an extra bracket on top of the unit, it does not come into contact with the factory ignition coil but may interfere when trying to remove the it.
5) Reattach factory serpentine belt and check that everything is secure and in place.
6) Follow the factory alternators red power wire that leads to the fuse box. Mine started red and went to green when it entered the fuse box, your may vary. Cut the green wire and remove the rest of the wire.
7) Take a piece of 4 gauge wire about 25 inches or longer; I picked mine up at AutoZone for a few bucks, and attach it to the new alternator.
8) Unscrew one of the two bolts that hold the stock alternator and battery wire, and attach the other end of 4 gauge wire to it.
9) Reattach the positive and negative battery cables and double check that everything is tight and secure.
10) You’re done!
The part number for the alternator you'll need is 56029914AA. Both alternators will work, and both are 160 amp. Why they have different part numbers are beyond me, but they are both confirmed as working.
Here's a brief overview of the install:
1) Disconnect the positive and negative battery terminals first, then the alternator power cable and electrical plug.
2) Using a serpentine belt tool or a breaker bar in my case, remove the serpentine belt.
3) Remove the two bolts that hold the alternator in place and remove factory alternator.
4) Install the 160 amp alternator; it took some finessing and patients to get the alternator in. I ended up having the file some of the factory alternator bracket in order for the new one to fit. Be patient and take your time, you don’t want to damage your new alternator.
*NOTE* The Durango alternator has an extra bracket on top of the unit, it does not come into contact with the factory ignition coil but may interfere when trying to remove the it.
5) Reattach factory serpentine belt and check that everything is secure and in place.
6) Follow the factory alternators red power wire that leads to the fuse box. Mine started red and went to green when it entered the fuse box, your may vary. Cut the green wire and remove the rest of the wire.
7) Take a piece of 4 gauge wire about 25 inches or longer; I picked mine up at AutoZone for a few bucks, and attach it to the new alternator.
8) Unscrew one of the two bolts that hold the stock alternator and battery wire, and attach the other end of 4 gauge wire to it.
9) Reattach the positive and negative battery cables and double check that everything is tight and secure.
10) You’re done!
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