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post #1 of 13 Old 08-25-2012, 12:04 PM Thread Starter
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Rubicon rear diff.

Help! I am repowering my 2008 Rubi, and I want to go with like a 3.55 gear set. Does anyone make a ring and pinion any higher than 4.10 for the jk Rubicon axles?
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post #2 of 13 Old 08-25-2012, 12:25 PM
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yes plenty, yukon, superior, G2, ten... A quick search will get you everything you need to know about choosing gears. Plenty of great vendors on here can get you great deals. Jason at Krawl offroad, Marcus at River City Offroad are just two. Again "search" is your friend dont be afraid to use it.

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post #3 of 13 Old 08-26-2012, 01:32 PM Thread Starter
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From all my searches I see ratios no higher than 4.10 for the Rubicon d44
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post #4 of 13 Old 08-26-2012, 01:40 PM
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Quote:
Originally Posted by razorback View Post
From all my searches I see ratios no higher than 4.10 for the Rubicon d44
What makes you want to go higher than 4.10? You will likely need to use a 3.73 or 3.21 factory non-Rubicon rear axle gear set, and figure out what works for the front.

I'd expect the odds of you finding a 3.55 JK D44 gear set for both axles on someone's shelf are very thin. It's going completely backwards than 99.9% of what people change to.

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post #5 of 13 Old 08-26-2012, 02:17 PM Thread Starter
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When I mean higher I mean higher geared/lower numerically. I'm still searching your right everyone with a rubi is going to 4.88/5.13. I'm still not sure what I can do. Probably stuck.
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post #6 of 13 Old 08-26-2012, 02:22 PM
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Quote:
Originally Posted by razorback View Post
When I mean higher I mean higher geared/lower numerically. I'm still searching your right everyone with a rubi is going to 4.88/5.13. I'm still not sure what I can do. Probably stuck.
May I ask why you want a higher ratio?

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post #7 of 13 Old 08-26-2012, 02:48 PM
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I think he wants to regear his JK, but is thinking that the higher gears (lower numerically) will put him where he wants to be. Maybe? ..

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post #8 of 13 Old 08-26-2012, 03:41 PM Thread Starter
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This is the reason. I'm repowering with a diesel and the torque is much lower than the gas and I need a lower RPM highway speed. I may be fine with the 4.10s.
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post #9 of 13 Old 08-26-2012, 03:44 PM
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Originally Posted by razorback View Post
This is the reason. I'm repowering with a diesel and the torque is much lower than the gas and I need a lower RPM highway speed. I may be fine with the 4.10s.
Is 3.55 what the Euro diesels come with? Diesels are much more finicky with tire height changes/gear changes, I'd try to keep with what they sell in the Euro models. The gearing/tires affects spooling.

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post #10 of 13 Old 08-26-2012, 06:29 PM Thread Starter
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European diesels come with 3.21 or 3.73 so I think 3.55 would be a happy medium. It doesn't have to be 3.55, just something in that range.
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post #11 of 13 Old 08-27-2012, 04:38 PM
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What is the power curve of the diesel? My 5.9L Cummins in my tow rig has 4:10 gears and 35's. It runs right in the powerband, With 3:55 gears it would fall flat dropping down to 1400rpm @55mph. Just something to consider.

FYI: 5.9L Cummins is 1600-2300rpm

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Quote:
Originally Posted by -SLADE- View Post
Metalcloak claims to have the highest clearance flat fenders and their Duroflex joints appear to bridge the gap between stock clevite bushings and re-buildable joints making them a great option for daily drivers. Metalcloak's dual rate coils actually backup the available travel in their suspension instead of just making claims of "flex" and "max travel" only to provide short coils with little travel like some have done.
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post #12 of 13 Old 08-27-2012, 07:28 PM Thread Starter
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4bt. very low end torque. They say about 18-1900 is ideal cruising/economy. I figure with 33 inch tires I will be at about 2200.
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post #13 of 13 Old 08-28-2012, 08:40 AM
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Ok, 3:73 would be about right. Should be about 2000 rpm cruising down the freeway at 65.

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Quote:
Originally Posted by -SLADE- View Post
Metalcloak claims to have the highest clearance flat fenders and their Duroflex joints appear to bridge the gap between stock clevite bushings and re-buildable joints making them a great option for daily drivers. Metalcloak's dual rate coils actually backup the available travel in their suspension instead of just making claims of "flex" and "max travel" only to provide short coils with little travel like some have done.
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