Differential Repair

Your vehicle's drivetrain matters! Let the differential repair specialists take care of any repairs or upgrades you need.

At John's 4x4 & REV Outfitters, we provide a full range of gear and axle services for automotive, off-road and 4×4 vehicles, including Jeep, Toyota, Ford, Ram, Chevys, and more. Whether you’re in Denver, Boulder, Erie, Fort Collins, Loveland, Johnstown, or anywhere in Northern Colorado, we have a location and a team of experts that specializes in differential repair and re-gearing ensuring your vehicle’s drivetrain is optimized for performance and reliability in any terrain.

Differential Repair & Service

At your local John's 4x4 & REV Outfitters near you, we’ll diagnose the problem, recommend the necessary differential repairs, and also provide options for upgrades depending on your vehicle and use.

Re-Gearing & Lockers Installation

We install a variety of premium gears and axle components from trusted brands such as Eaton, ARB, Revolution Gear and Axle, Yukon Gear and Axle, and many others.

Axles

Need a better or stronger axle? Full replacement with a Dana Spicer or G2 option? Reinforce your existing axle with quality welded trusses and more!

Schedule Appointment

Industry Leading Warranty

3 Year / 36k Miles

Nationwide warranty on parts and labor for 3 years or 36,000 miles on premium manufacturer and OEM parts giving you the peace of mind no matter where your destination or adventure takes you. Compare that to the standard dealership warranty of 12 months or 12,000 miles.

We got your back!

Learn More

Our Differential and Axle Services

ASE-certified technicians with years of experience
State-of-the-art diagnostic tools for accurate problem detection
OEM and high-quality aftermarket parts for long-lasting repairs
Transparent pricing with no hidden fees
Warranty on parts and labor for added peace of mind
Customer-focused service that puts your needs first

Re-Gearing & Lockers

Premium gears and lockers by Revolution, Yukon, ARB, Eaton, and more
All re-gears include: Front and rear ring and pinion gear set, Master install kits, New differential bearings, New front axle seals, Replace with new gear oil, Labor - Installation Done Right
Installing the pinion shaft and bearings, setting the right tolerances, and checking for gear tooth contact pattern
3 year / 36k Mile warranty on parts and labor labor

Preventative Maintenance for Your Drivetrain & Differential

Regular drivetrain inspections to catch small issues early
Differential fluid service every 30,000 to 50,000 miles
Drive shaft and U-joint lubrication to prevent excessive wear
Transfer case maintenance for AWD and 4WD vehicles
Axle and bearing checks to ensure smooth operation

Looking for an Differential Repair Shop you can trust?

    
 
 
      Posted on Google  
   Eric Edwards 
 5 September 2026
 
 
  Great guys, great work! The fella that drives the Subaru was especially helpful. Highly recommend taking your vehicle here.
  
 
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   Joe Lhotka 
 3 September 2026
 
 
  1st Class work
  
 
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   Cory Daniell 
 28 August 2026
 
 
  So I wanted to lift my truck. I knew what I wanted but I had no idea what would work as far as fitment. Thank you Matt for your straightforward and honest advice. My truck turned out exactly the way I wanted it and the techs did an amazing job. Thanks again,   2012 Nissan Frontier SV
  
 
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   j r 
 21 August 2026
 
 
  Had a Rooftop tent installed. Theses guys are great was quick and painless!
  
 
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   RJ Benson 
 20 August 2026
 
 
  These guys did a great job with the alignment on my lifted 4runner. doing it exactly how I hoped for. The specialists here are passionate about their work and really know what they're doing and how to work on your specific vehicle. I recommend this place to anybody needing work on their lifted 4x4 where most shops can't do it quite right.
  
 
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   Rich Hackney 
 10 August 2026
 
 
  It was an absolutely phenomenal experience. Communication was great from start all the way to finish. Clear direction and expectations, no hidden prices. And most importantly, the work was flawless! I am already planning to bring my truck back for more upgrades. Would highly recommend!
  
 
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   Dan Aweida 
 6 August 2026
 
 
  I’ve been a customer for 20+ years.  Great team with high quality work and professionalism.
  
 
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   Rachael Enrici 
 4 August 2026
 
 
  I’ve been bringing my lifted Jeep to REV Outfitters in Boulder for the past four years, and they consistently deliver top-notch work. Izsak and the entire team are fantastic to work with. They are exceptionally knowledgeable, especially Izsak, who always takes the time to thoroughly answer any questions I have and they are completely upfront about costs every step of the way. I also love how easy it is to contact them directly, unlike a dealership where you have to jump through hoops and go through a ton of different people just to talk to a specialist. I just had some repairs done on my lifted Jeep, and thanks to their hard work, it's driving better than ever. If you're looking for a trustworthy local shop that knows what they're doing, especially when it comes to custom or lifted setups, I can't recommend them enough!