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Old 03-28-2008, 08:09 PM   #1
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Changing Diff Gears

Further to my recent posting I have done some research into the suject. Here is what I have: My 2006 four liter six speed Wranger has a Dana30 front and Dana35 rear axel with 3.07 gears from the factory. I lifted it and fitted 33X12.5 Baja Claws. I found out today that someone at the place I work can do the work (having experience building several race cars etc). He asked me to check to see if the gear carriers in the diffs would accept a change to 4.10 gears. I called the dealership and was told that I did not need new carriers. Assuming that this is correct; new gears will run $4-500 for two sets. I was advised that 4.10 would be the best ratio to have for 33's. Can anyone reccomend a supplier for gears? Actual specs woudl be good. If I have my buddy at work fit the gears for me I want to make sure I buy the right ones.

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Old 03-28-2008, 08:18 PM   #2
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You will need new carriers as the break over point is like 3.53 or somthing. 4.56 is best forthe 33's

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4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-28-2008, 08:19 PM   #3
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Quote:
Originally Posted by 4.0l sahara View Post
You will need new carriers as the break over point is like 3.53 or somthing. 4.56 is best forthe 33's
3.73 is the split. And not so sure 4.56 would be the best bet with the 6 speed. Who has a gear chart laying around for the 6 speed tranny?
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Old 03-28-2008, 08:20 PM   #4
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Ya I thats right don't know why 3.53 came to mind. I'm tired.
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99 sahara
4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-28-2008, 08:22 PM   #5
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Originally Posted by MR.CLIFFORD View Post
3.73 is the split. And not so sure 4.56 would be the best bet with the 6 speed. Who has a gear chart laying around for the 6 speed tranny?
I belive that the ratio is about the same except for a lower first speed. But I think that 6th gear is about the same a 5th gear on a 5spd
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99 sahara
4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-28-2008, 08:25 PM   #6
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I don't remember that being the case. Just my own personal recollection of driving a 6 speed. I'm confused why he has a 6 speed and 3.07s.
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Old 03-28-2008, 08:26 PM   #7
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Ya that is weird I thought they had 3.73 hold on I'll find the gear ratios.
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99 sahara
4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-28-2008, 08:29 PM   #8
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AX-15 3.83, 2.33, 1.44, 1.00, 0.79
NV3550 4.01, 2.33, 1.39, 1.00, 0.78
I've seen 2 different sets of numbers for the 6 speed, do not know which one is correct -maybe one is for the export models.
NSG370 5.014, 2.831, 1.789, 1.256, 1.00, 0.828
4.46, 2.61, 1.72, 1.25, 1.00, 0.84
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99 sahara
4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-28-2008, 08:33 PM   #9
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Originally Posted by 4.0l sahara View Post
from jeep forum
Its gotta be true then.
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Old 03-28-2008, 08:35 PM   #10
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I like to read there but Hang out and post here thats why I have like 4 post there.
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99 sahara
4.0/np231/ax15/d30/d35
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 03-29-2008, 12:47 AM   #11
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i have a six speed 4.0 and it 3.07. would it be more progressive to get new gears or just save up the money and get d44 it both front a rear?? i dont got hardcore wheeling right now as it is my dd. advice greatly appreciated
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Old 09-21-2011, 10:17 AM   #12
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Quote:
Originally Posted by tough_jeep89 View Post
i have a six speed 4.0 and it 3.07. would it be more progressive to get new gears or just save up the money and get d44 it both front a rear?? i dont got hardcore wheeling right now as it is my dd. advice greatly appreciated
if you are only going to be running 33's then go HP D30 front and D44/8.8 rear

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