At least for a 2000 TJ, the factory part numbers for the stock alternators are as followed along with their AMP rating:
56041565AA 1 ER0 117 Amp
56041685AA 1 ER0 81 Amp
I have the 117A unit in mine and want to upgrade to 160A myself for winching reasons.
00 Wrangler Sport 4.0L NV3550
4" RC LA full suspension system
Bilstein 5100 shocks all around
axles (30,8.8) with 4.88 gears ARB F/R
SYE and CV rear driveshaft from Drivelines NW
Currie HD steering (Thanks Savvy, Awesome customer service)
Savvy LED tail lights (Thanks again Savvy)
GY MT/R Kevlar 35x12.50x15 on 15x10 American Racing AR23
Bestop soft top with tinted windows
Smitty front and rear bumpers w/rear tire carrier
Smitty XRC8 winch w/synthetic rope
Smitty rear corners and rock sliders with step
Genrite aluminum 6" tube fenders front/rear
Dodge Durango steering box with Pure Jeep skid and M.O.R.E. steering brace
The difference in the 02 and older are the mounting bracket and location of the alt and plug. if you look its mounted lower and has different positions for the mount. On 03 and newer TJs its mounted higher up and has different mounting positions. The older model durango (98-99) with the V8 5.2-5.9L with ALL power package and AC has the same mounting locations for the newer 03-06 TJs. It puts out 160a max not idle.
Midnight Blue '06 TJ//Dana 44 w/4.56/4" Teraflex w/shrt adj arms, 1" teraflex BL, discos, adj trackbar F+R/SYE, Tom Woods shafts/ARB lockers F+R/Yukon frnt axle w/760/ARB Hi output compressor/ Safari Snorkel/KC 6"+8" trails+fogs lights/Procomp Rockcrawlers/35" BFG MT KM2/Warn winch/steering box, oil pan, trans, bellyup,warn diff skids/diamond plate body armor/Olympic Rocker Guards/Herculined/CB/Amsoil all the way around, and a few more things
I just pulled the trigger on my 98 TJ with a 2.5L. I installed an alternator I bought from the classified section of this forum. I bought a Denso #5602 7913 out of a Jeep Grand Cherokee w/ a 5.9L. I changed the pulley from the 7 groove to a 6 groove and changed the plastic wire guard. I did not upgrade the alternator to battery wire. The only issue I had was getting the new alternator into position, I had to push it up from under the jeep, the factory clearances for the 90 amp did not allow the space for the larger 136 amp alternator.
I took my newly purchased alternator to Reily Zone to get it checked out prior to installation, just to make sure I hadn't purchased a dud.
Seems to work fine, my 4 KC light are significantly brighter or maybe I see what I wanted to see.
So for us 03 and up guys, specifically 06, which seems to be different in the Autozone system what alternator options do we have. I found the 165 A unit from Load Boss, but it only states up to 05 model year.
1999 Jeep Wrangler 4.0 Liter. Swap it with a 2002 Dodge Durango 160 amp Alternator. I took of the pulley from the factory Jeep alternator and put it on the new alternator. The factory clip on my jeep fit perfect in the new alternator. I did have to use a step bit on the ring terminal to make it fit. Install went perfect.
Guy's, don't forget that with more amperage you need to increase the size of your primary wire to the battery. I assure you that the factory wire was barely enugh to handle the factory alternator output. I would use a minimum of 4GA, if not 2GA wire to be safe. I didn't notice it any where in the thread, so ignore me if I missed out on that!