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Old 01-05-2014, 07:42 PM   #1
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Re-Gearing what brand?

Vehicle Make: Jeep
Year: 2004
Model: Wrangler X - Columbia Edition
Engine: 4.0L AMC Straight Six
Transmission: 5-Speed Manual (NV3550)

I am going to be re-gearing my differentials and was wondering are some brands of Ring & Pinion gears and diff. overhaul kits better than others?

The main reason for the change is that I am increasing the tire/wheel size to 265/70/17 and I will be doing some amount of towing.

Front Diff., Dana 30: Currently 3.07 changing to 4.10
Rear Diff., Dana 35c: Currently 3.07 changing to 4.11

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Old 01-05-2014, 07:59 PM   #2
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Yukon

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Old 01-05-2014, 08:14 PM   #3
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Yukon are great! But for Exactly the same thing and less money you can go with Nitro gears. Do some research and they have the same manufacturing process. My Mechanic who has been building not just jeeps but high speed, high heat, high horsepower rigs strongly recommended this brand. The link below has everything you need except the new carriers, but you can buy those from that website as well, and gear oils of course. Did I put ANY money into my D35? No I didn't. I bought a Dana 44 for $800. For the price of re-gearing the Dana 35 when all said and done you could have a Dana 44. That being said its a whole other can of worms swapping an axle. I see your new to the forum so I just wanted to add my two cents, but somebody once told me my two cents was worth 33 dollars. Its your jeep do what you want with it!

Jeep Wrangler TJ LJ Grand Cherokee Wj ZJ Cherokee XJ Dana Model 35 4.11 4.56 4.88 Gears Kit

Oh and Koyo bearings that the above kit includes are top notch and some people argue are better than Timken!
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Old 01-05-2014, 09:13 PM   #4
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FireMike - Thank you for the 2˘. Your point about the D44 is a good one, however, since I am doing the work myself I think I can get it done for about $785.00 in parts.

Also, my TJ is going to spend 95% of its time on pavement and 5% off-road (no rock crawling) and towing a bit.

The $785.00 is for:
  • Front/Rear Ring & Pinion
  • Front/Rear Overhaul kit
  • Front/Rear Carrier
I have not done differentials before can anyone tell me if I have any surprises waiting for me or if there are any special tools I need?

Thanks!
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Old 01-05-2014, 09:34 PM   #5
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X2 on Yukon. I run their R&P chromoly axles
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Old 01-05-2014, 09:38 PM   #6
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IDK the name of the tool for setting the crush sleeve but I do know it cost about 400 bucks. Re-gearing your axles, in my opinion, is probably more challenging than rebuilding your engine lol. I highly, highly, highly, beyond extremely recommend getting them done professionally. If you screw them up your out the cost of gears and you have to buy a new set. You have to be with in thousands of an inch. Even if you install them correctly then don't break them in correctly you can damage them and they are no good!

If your tj is going to be on the road most of its life than the Dana 35 will be fine. I ran my D35 with 33's for a good amount of time with some not so conservative throttle use. Some guys will tell you don't put any money into it. that's true if your going off road and beating on it a little. A Pavement princess will be alright. like I said people will tell that it wont be though, it seems to get blown out of proportion sometimes.

Additionally, If you buy your own gears and take them to a shop you can kiss the warranty from the manufacturer good bye. They WILL blame it on the shop doing the instillation and them being set-up incorrectly.

I'm not saying you can't learn how to do it. Just saying it could cost you if you do it wrong!

Good video, I know its a Toyota but it the same thing lol.


Hope it helps!
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Old 01-05-2014, 09:47 PM   #7
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Yukon. Best warranty around and made in usa
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Old 01-05-2014, 10:01 PM   #8
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That is a great video thank you for sharing it. I am not setup well enough to take care of this job at the house.

That being said what is the general consensus on running 31in. tires on 3.07 gears. I have heard one great opinion from someone who very much sounds like he knows what he is talking about saying that it is just fine.
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Old 01-05-2014, 10:22 PM   #9
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I ran 3.07s with 33's and 4.0L for over a year. I have a AX-15 5speed. I did not use my 5th gear unless I had a tail wind, down hill and flooring it with someone pushing me. So you don't have a 5th gear. Don't try and overtake people or pull out in traffic and its fine. You will get worse gas millage and you will notice a substantial loss of power. Its livable but people do complain and enjoy the higher gears. If your towing I don't know how well it will tow with the substantial loss of power, could be interesting going up hills. I know your not going crawling with it but just in case you do, you should know your crawl (4Low) will be faster and a little more challenging with a manual. Like I said I did it for over a year and ran fairly challenging trails.

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Old 01-05-2014, 11:15 PM   #10
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I ran 3.07s with 33's and 4.0L for over a year. I have a AX-15 5speed. I did not use my 5th gear unless I had a tail wind, down hill and flooring it with someone pushing me. So you don't have a 5th gear. Don't try and overtake people or pull out in traffic and its fine. You will get worse gas millage and you will notice a substantial loss of power. Its livable but people do complain and enjoy the higher gears. If your towing I don't know how well it will tow with the substantial loss of power, could be interesting going up hills. I know your not going crawling with it but just in case you do, you should know your crawl (4Low) will be faster and a little more challenging with a manual. Like I said I did it for over a year and ran fairly challenging trails.

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Thanks!
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Old 01-06-2014, 12:16 AM   #11
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Originally Posted by Metalcolt View Post
FireMike - Thank you for the 2˘. Your point about the D44 is a good one, however, since I am doing the work myself I think I can get it done for about $785.00 in parts.

Also, my TJ is going to spend 95% of its time on pavement and 5% off-road (no rock crawling) and towing a bit.

The $785.00 is for:
  • Front/Rear Ring & Pinion
  • Front/Rear Overhaul kit
  • Front/Rear Carrier
I have not done differentials before can anyone tell me if I have any surprises waiting for me or if there are any special tools I need?

Thanks!
You can get it done for less. See my sale thread here for Nitro Gears. You will need a magnetic dial indicator to set backlash.
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Old 01-06-2014, 12:22 AM   #12
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You can get it done for less. See my sale thread here for Nitro Gears. You will need a magnetic dial indicator to set backlash.

This is LITERALLY the same price as the link I posted! sales pitch much?

Just find them local to you so it saves on shipping.

And the kit you posted doesn't include carriers which are about 80 bucks each.
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Old 01-06-2014, 12:30 AM   #13
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This is LITERALLY the same price as the link I posted! sales pitch much?

Just find them local to you so it saves on shipping.

And the kit you posted doesn't include carriers which are about 80 bucks each.
True, however, there is the PM system and instant rebates are always a possibility. Plus my prices are shipped. Add $75.24 for carrier.
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Old 01-06-2014, 12:54 AM   #14
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if prices are shipped that's a pretty fair deal!
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Old 01-06-2014, 05:07 PM   #15
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This is LITERALLY the same price as the link I posted! sales pitch much?

Just find them local to you so it saves on shipping.

And the kit you posted doesn't include carriers which are about 80 bucks each.
lol who cares if it is a sales pitch? I call that good business practice.

That vendor is often very helpful too.
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Old 01-06-2014, 06:10 PM   #16
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Yukon. Best warranty around and made in usa
Made in USA my ass. Yukon is a box that buys whatever cheap gears they can find.

OP, ECGS makes the best master install kits around. I used Nitro gears and like them. Reality is aftermarket gears are virtually all the same.
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Old 01-06-2014, 06:31 PM   #17
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I use the nitro brand gear set for the front of my dana 44 and I used a G2 gear set for my rear 14 bolt the main difference I noticed the G2 gear set came with name brand bearings.
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Old 01-06-2014, 06:33 PM   #18
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Reality is aftermarket gears are virtually all the same.
Most are currently being made in Korea. Koyo's parent company JTEKT bought out Timken's roller bearing interests in 2010. Timken is now focussed on the industrial market. They are still marketing differential kits under the brand name DT Components through North Coast Bearings; a Bearing Technologies LLC in Avon Ohio. Haven't done the research to see if JTEKT is envolved in that.

http://www.dtcomponents.com/
Timken Signs Agreement to Sell Needle Roller Bearings Business to JTEKT

https://www.google.com/search?q=timk...t=firefox-beta
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Old 01-07-2014, 10:43 PM   #19
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lol who cares if it is a sales pitch? I call that good business practice.

That vendor is often very helpful too.
Thanks kyle. But it seems like he didn't read the what the OP talked about and just skipped down and assumed it was cheapier. It was the same price! Plus he didn't include carrier costs which he "would" need. But he dosen't because he's not even going to buy the Gears!!!!

I did also leave a comment that his shipping rates were fair. They were free lol. So if my point was to buy local to save on shipping cost and his shipping cost are free it doesn't really matter does it. His would be the best deal.
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Old 01-07-2014, 10:52 PM   #20
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It's all good. No matter what we all prosper because we are doing what we love; working on and enjoying Jeeps.
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Old 01-07-2014, 11:06 PM   #21
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It's all good. No matter what we all prosper because we are doing what we love; working on and enjoying Jeeps.
Thank you, If I knew your shipping rates were free I wouldn't have even made the comment.

What are your impressions of Koyo? Is there better out there?
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Old 01-07-2014, 11:20 PM   #22
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Thank you, If I knew your shipping rates were free I wouldn't have even made the comment.

What are your impressions of Koyo? Is there better out there?
Koyo is a top of the line bearing. It's what ECGS uses in their master install kits and what Ford uses from the factory.
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Old 01-08-2014, 12:22 AM   #23
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Koyo is a top of the line bearing. It's what ECGS uses in their master install kits and what Ford uses from the factory.
Also what Toyota uses for their OEM bearings.
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Old 01-08-2014, 01:27 AM   #24
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It's all good. No matter what we all prosper because we are doing what we love; working on and enjoying Jeeps.
Absolutely. Joined two loves today, modded my stock fenders into flat fenders while taking a time lapse photography of the process. Hopefully can get the timelapse up this week.
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Old 01-08-2014, 01:35 AM   #25
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Originally Posted by Metalcolt View Post
Vehicle Make: Jeep
Year: 2004
Model: Wrangler X - Columbia Edition
Engine: 4.0L AMC Straight Six
Transmission: 5-Speed Manual (NV3550)

I am going to be re-gearing my differentials and was wondering are some brands of Ring & Pinion gears and diff. overhaul kits better than others?
The main reason for the change is that I am increasing the tire/wheel size to 265/70/17 and I will be doing some amount of towing.

Front Diff., Dana 30: Currently 3.07 changing to 4.10
Rear Diff., Dana 35c: Currently 3.07 changing to 4.11
Will you be paying a shop to install them?

If you or a friend will be installing them, I would go with Dana-Spicer gears since you're going with a ratio they make. Dana-Spicer gears are also usually easier to set up when replacing the OE Dana-Spicer gears that came in the axle from the factory.
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Old 01-08-2014, 09:54 AM   #26
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Also, when you do dive into this, make sure you keep track of the shims as they come out. This is a good reference for a starting point with the new gears. Have a vernier caliper or micrometer on had to measure the thickness.
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Old 01-08-2014, 09:57 AM   #27
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What are your impressions of Koyo? Is there better out there?
Since Koyo/their parent company now owns the intellectual property and the roller bearing division from Timken. I would say it's a mute point which you choose. Koyo is less expensive generally. I suspect some former engineers have jumped ship from Timken to pioneer the new DT Components line marketed by Timken.

Have a blessed and prosperous day all.

Allen
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Old 01-08-2014, 10:08 AM   #28
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Dana-Spicer gears are also usually easier to set up when replacing the OE Dana-Spicer gears that came in the axle from the factory.
P.S. the reason I say that is because you can take the tolerance dimension numbers stamped into the new vs. the old currently installed Dana-Spicer gears and with a little simple math, come up with how they should be shimmed to either be very close to or right at being set up perfectly.

At the very least the numbers given on them will considerably shorten the set up time.
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Old 01-08-2014, 11:05 AM   #29
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Koyo is a top of the line bearing. It's what ECGS uses in their master install kits and what Ford uses from the factory.
x2. I got the Master Install Kits and Nitro gears from ECGS for my regear. Roughly 40k miles later, the Koyo bearings are still doing good according to trusted mechanics who recently disassembled & inspected the D44.
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Old 01-08-2014, 02:44 PM   #30
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My son has the same setup in a jeep he bought used. 2003 wrangler X with a 4.0L and 5 speed manual with 120k miles. It has 32.5 inch tires. He doesn't complain about performance. He even tows a 12 foot covered utility trailer loaded with decoys for hunting (1,400 pounds). Towing on hills is a challenge but most of Maryland's Eastern Shore is flat. I have been considering 4.10 gears for a little while now but only for cruising. RPM is so low with the 3.07 you don't get to use what limited power the 4.0L has.

I don't think the Dana 30 or 35 have crush sleeves, you just preload the pinion bearing. Off-road, 4WD low range has all the grunt he needs.

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