brutalxj

Went to the JY today and picked up an alt. out of an 2003 Dakota with a 3.9. Had it tested at around 136 amps! Took this bad boy home and did some grinding to the aluminum bracket and tossed out the bolt on steel one. Will make one with better clearance if necessary but I don't think I will need it. Vary happy and simple. 46 extra amps will help running lights, and ext. under a load without affecting spark.

iggnant-1-XJ

How did you wire it? got pics?
Does the plug fit?

Demolition_x

Its the same alternator as the ZJ. I just put one on a few weeks ago and it was a pain but it went in flawlessly.

To take advantage of the amps you will have to upgrade your wiring to larger wires. The way it sits it will work fine but to get the most out of it the wiring is undersized.

brutalxj

I have a 99 and the wires fit well the plug fit but the (fish eye) had to be drilled a bit bigger. 15 min install since the old one was already out.

JeepCoMJ

so basically direct plug and play to a 99 harness.

thanks for the tip...I'll do this mod for sure.

Gee oh Dee

Nice man. Thanks for the info!!

freegdr

you no it wont work for renix right

XJ Eric

You tossed out the front part of the mounting bracket? Smart?

duffman5001

Sorry I know this is an older thread, but a 136 amp zj alternator won't work in a renix? I have an 88 and just bought a zj alternator..

odgreen

Nope will NOT work

pieced together on my iPhone using all the extra parts from my cherokee...

duffman5001

Well that blows... so what are the options for a renix? as in junkyard options.. ?

SuperGlue

Yeah I have a renix also, what is stopping us from using the zj alternator?

odgreen

only option is to get a larger after market alt. like i did.
the difference is that our alts are internally regulated grand cherokee ones are not

Evil Drew M

There is a bazillion threads on this topic. It isn't new or a secret. Very common mod.

Spend 30 seconds searching "136 amp alternator" and you can find pics and everything.

I haven't put mine in yet but I got a spare bracket and did the grinding on the bench. I posted pics in another thread about this.

You want the Denso 7913 alternator.

duffman5001

I can't tell if you are talking to me or someone else- I spent way more then 30 seconds searching this mod- that is why I bought a 7913, and now figured out it won't work... Now I need to go to plan B. So the discussion now is not the zj swap, but figuring out the best option for upgrading the renix to a higher amperage unit.