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River City Differentials
Any Word On Their Work???
January 23, 2026
10:00 am
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Sloguy
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December 14, 2018
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I'm having 5.13 Yukon gears put in my JK.  Jeff L's guy wanted $3,500 and I had to buy Spicer gears from them.  I already have the Yukon gears and master build set and River City Differentials in Rancho Cordova said he'd put my gears in for $1,200.  He looks really busy as his calendar is a month out.  Any one have or heard about his work???

 

Thanks,

 

John

January 23, 2026
6:36 pm
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Jeff_R
Meadow Vista
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July 14, 2016
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John, they do good work. They have helped lead the committee River Run for us. You might want to mention that to them. I'm sure they remember when my front Dana 30 decided to retire on one of the committee runs in "the red TJ". I think the guy's name is Darren.

Jeff and Kathy Root

January 25, 2026
7:57 am
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Dale Clement
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Sean has done all the gears and locker work for me. He’s a great guy and does great work at great prices. I would not hesitate to recommend him to anyone who is looking to get work done on their axles.

Dale Clement 

January 27, 2026
8:47 am
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Sloguy
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Thanks Dale and Jeff!

February 9, 2026
8:57 am
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kris_olof
El Dorado
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Very pro River City Diffs, very meh on Yukon products as they are just the cheapest white label gears with a purple sticker on them. Sometimes you will get lucky, sometimes they will howl from day one. Biggest issue with JK and JL gears from yukon is that they use the older 5 step machining process vs the newer and stronger 2 step process that Spicer and Revolution do. They newer process means thicker teeth and a measurable improvement in strength. 

February 9, 2026
11:47 am
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Sloguy
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December 14, 2018
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kris_olof said
Very pro River City Diffs, very meh on Yukon products as they are just the cheapest white label gears with a purple sticker on them. Sometimes you will get lucky, sometimes they will howl from day one. Biggest issue with JK and JL gears from yukon is that they use the older 5 step machining process vs the newer and stronger 2 step process that Spicer and Revolution do. They newer process means thicker teeth and a measurable improvement in strength. 
  

Now you tell me haha.

February 11, 2026
8:27 am
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Calaveras32Spcl
Biggs, CA
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May 12, 2023
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kris_olof said
Very pro River City Diffs, very meh on Yukon products as they are just the cheapest white label gears with a purple sticker on them. Sometimes you will get lucky, sometimes they will howl from day one. Biggest issue with JK and JL gears from yukon is that they use the older 5 step machining process vs the newer and stronger 2 step process that Spicer and Revolution do. They newer process means thicker teeth and a measurable improvement in strength. 
  

I had only recently heard of Revolution, and had no idea if they were any good. So this is solid info, thank you. My axles desperately need a regear. 

Dale Mogg - WRZG209

February 11, 2026
6:59 pm
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Brian
Cameron Park
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October 28, 2016
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As everyone has said Sean at river city is legit. Had both my Jeeps done by him. 

W6JLU

February 11, 2026
7:21 pm
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Msplcdtxn
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July 8, 2023
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Sean did my Gladiator and I'm really happy!  He also did one of my coworkers on a 2500 ram. The Ram ended up making a lot of noise and he was super helpful and took care of it no questions asked. It's been over 3 years for both of us now with no issues! 100% would recommend. 

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