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Unread 08-04-2010, 08:50 PM   #16
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1998 TJ Wrangler 
Join Date: Aug 2010
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My 98 auto ran with 33's and 3.73's for a long time and it was actually pretty good on the street, off-road - well not so much. When I upgraded my axle from a 35 to a 44 I debated for a long time what gears to use. I ended up choosing 4.10's and for me they are the perfect compromise. I can run all day on the freeway and the RPM's are OK. Off road the auto hides a lot of the problems of being geared too high.

I also considered keeping the 3.73's and dropping the gearing in the transfer case for off-road. I can't remember why I didn't do that, but it still seems like an idea.

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Unread 08-04-2010, 08:57 PM   #17
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2002 TJ Wrangler 
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When I had 33's on my jeep with 4.10 gears, the rpms were a little over 3000 rpms on the highway at 70mph. That sucked. In florida heat and working the motor that hard, the coolant temp was always a tad over 210 (more so than most jeeps). Also the floor boards got rediculously hot.

I'm riding on 35 inch tires now with 4.10 gears and couldnt' be happier. If your jeep is a daily driver w/ 33 inch tires and you see the highway a lot, do not get gearing >4.10 IMO.
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Unread 08-04-2010, 09:01 PM   #18
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1999 TJ Wrangler 
Join Date: Jun 2005
Location: Scotts Valley, CA
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Originally Posted by joules102 View Post
I am running 4.56 with the 32RH and 33 in Duratracs. It spins on the highway but the get up and go is really nice. If It was a DD and I never considered going to 35's I would have done the 4.10's.

I ran 4.56's, 3Spd auto and 33's for about 3 years...RPMs too high for long HWY, but I was going to 35's (at now) and didn't drive much HWY.

4.10's if your staying @ 33's....
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Unread 08-04-2010, 09:32 PM   #19
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1998 TJ Wrangler 
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I have 4.10s and ARBs on the shelf waiting to go in. I drove friends a few years back with 4.10s and 33s. Good overall setup..
'98 TJ, 5.7 HEMI, 545RFE, G2 33 spl. D44, HP D30,ARBs,4.10s, RE 4.5 LA,Savvy 1.25 BL,35in MTRs w/Pro Comp 15x10 alloys, Warn 9.5 cti w/Amsteel rope, Gen Rite G3 Alumium front fenders and rear flares, Premier Power welder 195 amp,Savvy Rockers,Prothane bumps,LED tail lites, Rampage top
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Unread 08-06-2010, 09:20 PM   #20
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what is the optimal cruising rpm for the 4.0 with a 32rh. I have the 3.07's with 31's and i hate it I'm debating on throwing down the cash on one of those bolt in 8.8's but I cant decide on 3.73's or 4.10's my jeep never see's speeds over 60mph and is a spare vehicle. I will eventually upgrade to 33's
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Unread 08-06-2010, 09:53 PM   #21
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2000 TJ Wrangler 
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Originally Posted by 88wagon View Post
I will eventually upgrade to 33's
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Unread 08-06-2010, 10:07 PM   #22
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1999 TJ Wrangler 
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I have the d44 and 3.73's (all from factory might i add) and 31's, its just about perfect for me, other than the long highway drives. I will do about 70mph at 3,000rpm which is a bit more than I and the Jeep like, especially since we are doing it in Georgia's low country where our heat index is 110.

I will be moving up to 32's pretty soon and hopefully it will be exactly where I want it. It will be the perfect set up for a DD/trail rider. IMO
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Unread 08-06-2010, 10:23 PM   #23
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4.56 with 33's and the 42RLE (overdrive)
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Unread 08-06-2010, 10:50 PM   #24
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I have 32s on my Sahara 5 speed which had a factory D44 with 3.73s that is currently being repaired. This is my DD and that combo was perfect. Was getting 16.5 mpg on my 76 mile commute. I'm running on a temporary D35 with 3.07s right now and it is downright horrible. From the top of 4th gear on, I can't get out of my own way, now get 12 mpg, and and loose speed on the slightest incline. One thing to consider with regearing is that your auto currently has 3.07s in it. To go to any of these gears, you'll not only need the $180 ring and pinion set and the $120 master install kit, but you'll also need a new carrier which is another $100. That's $400 in parts and anywhere from $250-$500 to set it up if you can't do it yourself. This is per axle! A D35 just isn't worth that much investment. If you found a resonably priced D35/D30 combo with 3.73 or 4.10, then fine, but I wouldn't try to convert one to that.
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Unread 08-07-2010, 05:53 AM   #25
2000 TJ Wrangler 
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I have had 33s, 3spd and 3.73s in mine. It's not too bad but there are times when I wish i had a somewhat lower gear ratio like the 4.10s - esp when towing the jet-ski or loaded for camping...

I'd go with 4.10s
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Unread 08-07-2010, 06:30 AM   #26
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33's and 4.10 for me. No regrets
97 TJ 4.0, auto, 4.5" RE long arm, 33 " MT/R's on Moabs, 4.10's, 8.8 w/Aussie locker, A to Z rockers, A/A SYE, Warn M8000, Vanco
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gear , recommendation , 33 , 4.0 , tj , wrangler , automatic
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