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Old 05-26-2013, 01:02 PM   #1
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Ring and Pinion Question

Does anyone here run Yukon Gears products? Looking to replace my 3:55 to 4:11's. I found a complete front and rear set NIB for $400 on Craigslist. Price includes the rebuild parts.

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Old 05-26-2013, 03:05 PM   #2
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I've been running them for 2 years. They are good parts.

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Old 05-26-2013, 05:52 PM   #3
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Yukon's ring & pinion gears are ok. What size tires, engine type, & what transmission are you running? Who will be installing them?
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Old 05-26-2013, 06:36 PM   #4
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Yukon's ring & pinion gears are ok. What size tires, engine type, & what transmission are you running? Who will be installing them?
4.0 with NV3550. I will be stepping up to 33's. I am currently looking for a good driveline shop. This is one project I wont attempt doing myself. I was on the fence between 4:11 or 4:56. But $750 worth of N.I.B parts for $400 is hard to pass up.
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Old 05-26-2013, 06:45 PM   #5
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$400 or not I'd go 4.56. Are you paying a shop to install them?
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Old 05-26-2013, 06:52 PM   #6
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$400 or not I'd go 4.56. Are you paying a shop to install them?
Why 4:56 over 4:11? Can I still use stock D30/D35's with 4:56? And yes I am asking around for a well referenced axle/driveline shop.
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Old 05-26-2013, 06:55 PM   #7
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I have done every other swap, upgrade, repair etc on my Jeeps, but the gears I always sub out to a Buddy who owns a Tuffy franchise in Illinois. He has been a Mopar guy his whole career and has drag raced extensively. Expert at gears. I just don't have the experience or the tools. He has done 4 differentials for me and they are always set up perfect.
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Old 05-26-2013, 07:05 PM   #8
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Why 4:56 over 4:11? Can I still use stock D30/D35's with 4:56? And yes I am asking around for a well referenced axle/driveline shop.
4.11 doesn't quite restore the power lost by the bigger & heavier 33" tire size. You can't simply regear to restore the stock engine rpms that worked for a smaller tire size since bigger tires require more engine power to turn... which means slightly higher RPMs than before. I installed 33" tires 15 years ago & against the advice of more experience Jeepers, I chose 4.11 instead of the 4.56 they recommended. The 4.11 gears initially felt great but within a few days I realized I had made a mistake of not going to 4.56... I was always having to downshift for even a very minor grade. No, 4.56 doesn't mean excessively high highway rpms... 4.56 is ideal for the highway with it also being ideal for offroading.

Not to mention the factory considers 4.11 (aka 4.10) ideal for 31" tires which is what it gears the Rubicon to for its factory 31" tires. 4.11 can't be ideal for both 31" and 33" right?

Finally, don't buy gears on your own with the intention of saving a few bucks and then paying a shop to install them. When you provide the gears, the shop will only warranty its labor & not the gears you provided. If something goes wrong, the shop will blame your gears & you'll be stuck. If the shop provides everything, their warranty will cover everything. And problems do arise from installig new R&P gears. The 4.88 gears I installed 10-12 years ago went bad 6 weeks after installing them from a bad setup by the installer. The shop I used apologized & took care of everything. They wouldn't have if I had provided the parts they used.

Hope that helps.
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Old 05-26-2013, 07:26 PM   #9
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Ive got 4:56 gears in myTJ ,33"tires & love them.What a difference.No downshifting to go up a incline.I was going to do the 4:11 gears & thought a 4:56 would "be too much" but its def not.It also makes wheeling more fun.With the factory gears,I think my 5sp had 3:07 I would give it some gas,then more gas,more clutch then more clutch to get over large rocks or ravins.Not the case now.
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Old 05-26-2013, 07:31 PM   #10
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I didn't really think much about the warranty end of it. Right now I run 31's with 3:55's and I know all to well about downshifting. What brands do you reccomend?
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Old 05-26-2013, 07:55 PM   #11
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I had asked this question of the forum 2 weeks ago and I was directed to JTs Parts & Accessories, Justdifferentials.com I worked with a guy named Opie. Bought Nitro gears which were highly recommended. Installed them yesterday and all seems good so far.

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