I have searched many different discussions and there seams to be some varying opinions. My alternator has a bad diode so I am going to replace it. I wanted to upgrade to the 136 amp 1998 Jeep Grand Cherokee alternator. I wanted to see if there was any additional steps other than the grinding to fit.
It seems there is some varying opinions on voltage regulation internal or external. Anyone with expertise in the area it would be appreciated!

 

The grinding is the only thing you have to worry about, the PCM will regulate the rest.

 

You will need to change the connectors also, a nice upgrade for the price IMHO. If desired you can also have them rewound to a higher output I did on my JY find before installing and be sure to upgrade all your battery/Alt. wiring and grounds before installing.

 

I added an electric fan so I went from the 90amp to the 117amp. The body size was only slightly larger and needed no grinding at all. It has no problems keeping up with my fan even with the lights and radio running. It was part number 15689V or 15689E. I got it from pepboys. I did swap the pulley but that was super easy.

Max

 

new style connector is on 99-up Jeeps, not applicable for the OP

 

I did a similar swap with mine, went from a 90 amp to the 117 amp. Mine was a direct swap, Bosch makes it.

 

I also did this exact swap on mine, you should upgrade the alternator charge cable while you at it, more juice is no good if you can't get it to the battery.

 

I upgraded the wires as well.

Max

 

Do you guys have a part # for the Bosch upgrade? Can't seem to find one.

 

I installed a 240 amp alternator from Tucson alternator.com and couldn’t be happier.

 

Just FYI this is a 9yr old thread.