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Old 01-30-2014, 06:52 PM   #1
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4.56's on their way!

Picked up 4.56's from northridge today. Came out to $725. They are yukon gears. Price includes gears, master overhaul kit, and new front carrier for my front d30. Should be here next week! Got a quote from a guy for around 800. Whats everyones opinion on that? Fierce attitude 35/12.50/17 is the rubber ill be wearing lol

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2013 jk 6spd - 18/59 coils - PS BFH Trail Stinger - Teraflex Hinge and Carrier - Yukon 4.56 gears - Teraflex c gussets - Teraflex front axle sleeves - Alloy USA Ball Joints - Banks Monster Exhaust - JKS Quick Discos - Pro-Comp 7069's - Fierce Attitude 35's - MORE Oil Pan/Trans Skid - PS Bombshell Diff Covers - Rancho 7000 MT's
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Old 01-30-2014, 06:58 PM   #2
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Not bad.
I'm saving up for gears w/ locker for mine. Hopefully it won't break the bank.

Good luck on your re-gear!

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Old 01-30-2014, 07:34 PM   #3
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Thanks! Have two prospective shops, talked to one have to talk to the other. Need this done RIGHT lol its a critical job.
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2013 jk 6spd - 18/59 coils - PS BFH Trail Stinger - Teraflex Hinge and Carrier - Yukon 4.56 gears - Teraflex c gussets - Teraflex front axle sleeves - Alloy USA Ball Joints - Banks Monster Exhaust - JKS Quick Discos - Pro-Comp 7069's - Fierce Attitude 35's - MORE Oil Pan/Trans Skid - PS Bombshell Diff Covers - Rancho 7000 MT's
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Old 01-30-2014, 07:35 PM   #4
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I went to 4:56 when I put on 35s. 3.6 auto. Very satisfied. Wasn't ready for lockers so I dropped a trutrac in the rear at the same time.
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Old 02-01-2014, 03:05 PM   #5
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I got the same set up. Cost for parts $675.00. Cost for install $850.00. In the end we will pay the same $1,525.00......... One place told me $2,275.00, if they got the parts and done the install. So, you are good at $725.00 and $800... From what I have been quoted.
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Old 02-02-2014, 12:43 PM   #6
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Found a guy that works just on jeeps, he wants 700 and will warranty it 12 months 12k miles. A few people recommended him to me and he seems like a cool dude. JVS in new windsor. Think im gonna give him the go as soon as they get here.
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2013 jk 6spd - 18/59 coils - PS BFH Trail Stinger - Teraflex Hinge and Carrier - Yukon 4.56 gears - Teraflex c gussets - Teraflex front axle sleeves - Alloy USA Ball Joints - Banks Monster Exhaust - JKS Quick Discos - Pro-Comp 7069's - Fierce Attitude 35's - MORE Oil Pan/Trans Skid - PS Bombshell Diff Covers - Rancho 7000 MT's
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Old 02-02-2014, 03:56 PM   #7
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Sounds good. I am still in my 3.21's and it gets me by with the 3.6 but I want more.
You guys that changed, what is the major differences you notice?
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Old 02-06-2014, 06:21 PM   #8
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Getting serious here!!

Attachment 740977
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2013 jk 6spd - 18/59 coils - PS BFH Trail Stinger - Teraflex Hinge and Carrier - Yukon 4.56 gears - Teraflex c gussets - Teraflex front axle sleeves - Alloy USA Ball Joints - Banks Monster Exhaust - JKS Quick Discos - Pro-Comp 7069's - Fierce Attitude 35's - MORE Oil Pan/Trans Skid - PS Bombshell Diff Covers - Rancho 7000 MT's
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Old 02-14-2014, 12:22 PM   #9
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You will need a new new spider gear set if the carrier you got is a 706008. The stock spiders in the stock JK front carrier will not swap over to the most common and industry typical 706008 carrier.
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Old 02-14-2014, 12:34 PM   #10
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I just ordered Yukon 4.56's from Northridge as well. I currently have 3.21's so was going to need the new carrier and spider gears as well. Those two things alone were going to cost $125 extra. So for not much more $$, I went ahead with a Truetrac in the front and eliminated the need for carrier and spider gears.

As far as install, Local shop quoted it for $420 with 12 mo/12,000 mile warranty
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Old 02-14-2014, 05:51 PM   #11
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Quote:
Originally Posted by Granite Rooster View Post
I just ordered Yukon 4.56's from Northridge as well. I currently have 3.21's so was going to need the new carrier and spider gears as well. Those two things alone were going to cost $125 extra. So for not much more $$, I went ahead with a Truetrac in the front and eliminated the need for carrier and spider gears. As far as install, Local shop quoted it for $420 with 12 mo/12,000 mile warranty
Great gear ratio. I've been running this ratio for awhile now. Work great for 33's
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Old 02-14-2014, 08:59 PM   #12
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Great gear ratio. I've been running this ratio for awhile now. Work great for 33's
Your running 4:56 with 33's on a 3.6 auto? What kind of rpm's do you run at 70? I'm guessing you have no problems with downshifting uphill in a head wind. MPG's???
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Old 02-15-2014, 08:51 AM   #13
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Just picked up teraflex inner sleeves, alloy usa ball joints, and teraflex c gussets for the install Happyhappyhappy
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2013 jk 6spd - 18/59 coils - PS BFH Trail Stinger - Teraflex Hinge and Carrier - Yukon 4.56 gears - Teraflex c gussets - Teraflex front axle sleeves - Alloy USA Ball Joints - Banks Monster Exhaust - JKS Quick Discos - Pro-Comp 7069's - Fierce Attitude 35's - MORE Oil Pan/Trans Skid - PS Bombshell Diff Covers - Rancho 7000 MT's
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Old 02-15-2014, 08:55 AM   #14
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Quote:
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Sounds good. I am still in my 3.21's and it gets me by with the 3.6 but I want more. You guys that changed, what is the major differences you notice?
Running 35s.

Mpg improved for sure. Just gotta get used to the higher RPMs at highway speeds.

Low end torque makes it easier to get moving from a stop.

On the trails in 4LO it'll crawl over things pretty good without even having to touch the skinny pedal.
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Old 02-15-2014, 11:41 AM   #15
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Dropped mine off Friday afternoon for the 4.56 install and it should be done early Wednesday. $1375.00 plus tax.
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Old 02-16-2014, 05:25 PM   #16
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Your running 4:56 with 33's on a 3.6 auto? What kind of rpm's do you run at 70? I'm guessing you have no problems with downshifting uphill in a head wind. MPG's???
I have a 3.8. Indicated Rpm around 2500 at 55 mph. Mpg are still less then desirable at 13mpg average on the dummy panel...not sure on actual.
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Old 02-18-2014, 01:49 PM   #17
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I have a 3.8. Indicated Rpm around 2500 at 55 mph. Mpg are still less then desirable at 13mpg average on the dummy panel...not sure on actual.
Gear chart for yours reads at 4.56 gears in 3rd. Not OD. You sure your in OD at 55?

I have 4.56's in my 2013 and they work great..2500 at 65 and crawls great.
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Old 02-18-2014, 02:02 PM   #18
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lotta 4.56s in here. Mine are going in Friday....cost is $594 installed. Paid $380 for the front and rear gear set. I dont offroad much, so I didnt go really high end. Looking forward to the change. I have 3.73s, auto, 3.6 with 35s right now. Its not BAD, but its not good!
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Old 02-18-2014, 02:06 PM   #19
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I did notice a drop in MPG from my 3.73's. I just dropped from 75 to 65 as a cruising speed if I am in gas saving mode.
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Old 02-18-2014, 03:31 PM   #20
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I did notice a drop in MPG from my 3.73's. I just dropped from 75 to 65 as a cruising speed if I am in gas saving mode.
What tire size are you running? And what's your dash readout on MPG?

I have a 14 auto with 3.73's running 33's for now. In also running the Superchip Flashpaq 87 performance tune. I'm showing 15.6 on the dash with mostly highway driving. I cruise at 70 with about 2400 rpms but it was windy today.

I'm looking to eliminate downshifting when uphill or in a headwind with cruise set at 70. 4.56 the way to go or too low of a gear for 33's? Eventually I'll go to 35's but I only want to regear once.
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Old 02-18-2014, 04:53 PM   #21
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What tire size are you running? And what's your dash readout on MPG?

I have a 14 auto with 3.73's running 33's for now. In also running the Superchip Flashpaq 87 performance tune. I'm showing 15.6 on the dash with mostly highway driving. I cruise at 70 with about 2400 rpms but it was windy today.

I'm looking to eliminate downshifting when uphill or in a headwind with cruise set at 70. 4.56 the way to go or too low of a gear for 33's? Eventually I'll go to 35's but I only want to regear once.
According to the chart, 4.56's will put you around 2699 RPM's @70 with 33's. Some don't mind turning that much, but I wouldn't want to. IMHO, I would stick with 3.73 until you swap to 35's. Again, that's just my opinion..
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Old 02-19-2014, 04:54 PM   #22
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Gear chart for yours reads at 4.56 gears in 3rd. Not OD. You sure your in OD at 55? I have 4.56's in my 2013 and they work great..2500 at 65 and crawls great.
I'm not sure if I'm in final drive or not. Haven't payed a great deal of attention. I commute 2 miles daily in town, rarely get about 35mph average speed. Put 4000 miles roughly on my jeep in a year. Bottom line, the ratio is great for my 285's.
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Old 02-19-2014, 08:03 PM   #23
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What tire size are you running? And what's your dash readout on MPG?

I have a 14 auto with 3.73's running 33's for now. In also running the Superchip Flashpaq 87 performance tune. I'm showing 15.6 on the dash with mostly highway driving. I cruise at 70 with about 2400 rpms but it was windy today.

I'm looking to eliminate downshifting when uphill or in a headwind with cruise set at 70. 4.56 the way to go or too low of a gear for 33's? Eventually I'll go to 35's but I only want to regear once.
I am on 35" KM2's. My gas milage was better with the 35's and 3.73 gears than now. BUT it crawls better.. I have checked my dash readings against actual fuel Calc's. It is always only .1 mpg off. I've quit checking. I average 15 in town and 17 to 19 on the road. If I keep the rpm in the green zone I do pretty good. But only a couple of hundred out it drops 3 to 4 mpg. Thats on my Jeep and my driving.2500 rpm is 65 in my setup.

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