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Old February 26th, 2012, 09:56 AM   #21
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Originally Posted by whiterhino View Post
I would go 3.0 or 3.8. Because of your 5.3, probably 3.8.
I'm running a 6.0/TH350/3.8 & 4.88's with 40's. I've never felt like I need a lower gear. More HP at times yes, but not a lower gear. If you feel like you have all the umph you want for bumping on rocks & logs, the next thing you want is to be able to generate wheel speed immediately. A lower gear generates RPM, but not wheel speed.

Yes, your NP231 is 2.71:1. When I had my NP231, 2nd gear low range was my strong gear. Now with the 3.8, my strong gear has moved to 3rd gear low range. It's great because all I do is shift it into D and let the trans do all the thinking. Before, I had to intentionally pull it down into 2nd.

Mine is in a YJ with a body lift so I can't comment on the fit. But Tab has an Atlas in a TJ and I don't think he had to do anything special.
mine is a 6.0/th350/3.8 atlas/5.38s and 42s.

only thing I would change would be an OD trans. I would like to have another gear when in low range so it would reach higher speeds instead of switching back to hi-range. it still moves out in 3rd/low range, but want another gear.
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Old February 26th, 2012, 10:06 AM   #22
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Agreed. That is the single dislike about the TH350.

Joe, Here's another way to look at it. For all practical purposes, your current NP231 @ 2.71:1 is the same as a 3.0. So, do you like it, or wish for a lower gear at times. That will answer your question. I think it's pretty obvious that no one thinks you need to go to the 4:1 or lower.
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Old February 26th, 2012, 09:41 PM   #23
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Thanks for all the input. Gonna get a 3.8-1 ordered tommorow.4.3-1 seems way to low and 3.0-1 seems like a waist.Plans are to try and fit it without a body lift And run there cable shifters. They seem to think it cant be done But who are they? They just design and build them
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Old February 27th, 2012, 02:35 PM   #24
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A related question. Are there any strength issues with the trans, using 3rd or 4th gear while in low?
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Old February 27th, 2012, 03:29 PM   #25
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whats the lead time right now? when i looked 2 months ago it was a 5- 7 week wait for an atlas.
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Old February 27th, 2012, 03:30 PM   #26
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5 weeks is what I was quoted
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Old February 27th, 2012, 03:33 PM   #27
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Id rather not say what kind of time they told me because i dont think theres a way in hell im gonna see it when they said i would. but never know Ill update as soon as it hits my door.
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Old February 27th, 2012, 03:34 PM   #28
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your roomate is going to be moving out soon after she finds out about this...

i will kick you in the ass this weekend if i see a 1310 u joint on your jeep.
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Old February 27th, 2012, 03:34 PM   #29
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Ive had alot of expensive hobbies but never one that cost this much money!!!!!! at first it was a few hundred here and there but now its a few grand every time i wanna change/upgrade
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Old February 27th, 2012, 03:38 PM   #30
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then you get to spend more next winter when we start your buggy.
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Old February 27th, 2012, 07:23 PM   #31
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your roomate is going to be moving out soon after she finds out about this...

i will kick you in the ass this weekend if i see a 1310 u joint on your jeep.
Its kinda like a ring I mean its shinny and has some expensive metals in it....



And no more 1310 up front had them build the case with flanges on the front and rear for 1350`s.
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Old February 27th, 2012, 10:39 PM   #32
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Ive had alot of expensive hobbies but never one that cost this much money!!!!!! at first it was a few hundred here and there but now its a few grand every time i wanna change/upgrade

welcome to the club!!!
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Old February 28th, 2012, 09:24 AM   #33
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My wife still has a 500$ engagement ring and I have a new shop and a 15,000$ jeep. Lol. But she did get a new kitchen.
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Old March 17th, 2012, 10:29 PM   #34
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Just got this in the mail this afternoon.took about three weeks.Cant really complain with that. Unfortunatly probly not gonna have time to install it for a few weeks
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Old March 18th, 2012, 08:10 AM   #35
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It's an exciting day when the 120# box of shiny aluminum shows up! What ratio did you go with again?
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Old March 18th, 2012, 08:10 AM   #36
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Oh and mine took exactly 21 days to my door too. Awesome customer service at AA.
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Old March 18th, 2012, 09:03 AM   #37
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A related question. Are there any strength issues with the trans, using 3rd or 4th gear while in low?

nope.
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Old March 18th, 2012, 10:49 PM   #38
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nope.
Thanks, I was just wondering what would happen when 3rd or 4th becomes your go to gear for hill climbs.
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Old March 14th, 2013, 08:31 AM   #39
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Sweet, hopefully my 4spd shows up in 3 weeks instead of the 8 I was told when the order was placed.

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