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Old 03-09-2010, 10:31 PM   #1
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I listened and Thanks

My 04 TJ unlimited was stock and I know most all go for the lift and tires first however We chose to install a winch and asked the forum for advice. Followed that advice and now have a M8000 on the front end. Sears Platinum installed today and Winch Depot had a special for free shipping and free remote control. I also installed tow points front and aft.
My question now is do I need to upgrade to a 160 or 200 amp alternator?
Thanks in advance for the input. I have been using the manual a member helped me download and now I am trying to figure out how to put 31 tires on the jeep and recalibrate the speedometer. 04's have a mechanical drive not electronic. Can you change gear ratios on a speedometer drive?

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Old 03-09-2010, 10:34 PM   #2
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Your stock alternator should be fine for mild winching.. if you feel its an issue then change it out later.. no reason to spend money before you have too. As for the speedo.. should not be too far off with 31s.. not sure how to adj it on your model..

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Old 03-09-2010, 10:40 PM   #3
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I put 31's on my 06 unlimited, really no need to recalibrate. The difference is minimal and you should have no problem as far as suspension is concerned as well.
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Old 03-09-2010, 11:37 PM   #4
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Yes you can change speedo gears. It will take you all of about 10 minutes. Here is a really good write up on it.

Jeep.US41.org/speedo
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