I took my 1969 Pontiac Firebird to Arizona Differential Specialists on the recommendation of a trusted friend and I am glad I did. These guys are straight-up with you, share their knowledge to help you make the best decisions and experienced. They get your vehicle in-and-out wasting no time. If you're looking for a fancy showroom, shuttle service, coffee machine, etc., you're in the wrong place. If you're looking for good quality, honest work at a fair price, this is the place for you. I highly recommend Arizona Differential Specialists and will definitely be back should I need future service/repairs. read more

These cats are the real deal. They know their business and don't step outside the box. They resealed my front and rear differential on my Titan which has 284,000 miles. They kept their word on the price and the time. I would recommend them for both everyday differential work on your grocery getter and the hard core racing stuff like gearing and performance mods for your Hot Rod. read more

Great guys that work here and run the place . There little back up so be patient and believe it it will be done right and they back there stuff read more

Great knowledge, pricing, and service. Work was done to upgrade my differential gear ratio which only took 4 days. Way better than the competition. read more

Great service and highly recommended. I have a 2010 Nissan Titan and the rear differential locked up. Nissan dealership wanted to charge me 7k to replace. No bueno senior. David and his staff took care of the truck for 6 times less than what the dealerships asking price was. If you have a Nissan Titan and your differential locked up. Call this place! They even provide a tow truck for like 80 bucks (shout out to the homie Renee aka tow truck homie) Guys, save time and money and give these people a call. I'm out! read more

These guys are the best in the business. If you want a no nonsense shop that knows their shit , come here. Otherwise any other shop you go to , you will get that shaft. read more

I had a referral to this place from another garage who had worked on my transmission and then stated my differential needed to be looked at. I first took my vehicle to Christian Brothers (NEVER AGAIN) because they had done some work a few years ago with a wheel bearing. They repaired my other wheel bearing stating that was the problem and not my differential. (NEVER AGAIN FOR THEM). After that Christian Brothers told me it was also my Differential and it would cost me $2,100. I called AZ Differential Specialists and they estimated over the phone between $600 for a minor repair and $1,000 for something more major. Worst case scenario I was told it could get up to $2,000 or $2,200. BUT that was a totally bad with everything possibly wrong and damaged. So, I set an appointment and brought it in They diagnosed it and gave me the report over the phone. $870 to repair it. They finished within a few hours and I picked it up. No noise from the rear of my vehicle, running great. AND I SAVED A LOT. The shop does not look clean, but they are a Differential Repair place. What do you expect. They are polite and professional. Bubba gave me an estimate. He was every bit the professional I would like to see. Tony was there when I dropped it off. I highly recommend this place for the great work they do and affordable. read more

I highly recommend them! I had my differential rebuilt twice by another higher priced shop with less than acceptable results. A friend recommended AZ Differential. It took a couple of weeks to get an appointment. Now I know why. They fixed the problem at half the price of the other shop. I'm very pleased. read more

Mr. P found Arizona Differential by accident, as he was looking for another place he had seen at a car show, in order to work on our stuff for the 69 Camaro RS/SS. Turns out, Dave is probably the guy that the big joints sub out to. He was friendly and honest, and really knew his stuff. Dave's shop is a small outfit off Grand in the industrial area of Phoenix. Outside, he displays some of his completed work, and they appear to always be pretty busy. Mr. P was excited about the service he got here from Dave, and the really great looking rear end (woot woot!) he made us. And the price! Much less than the other guys who quoted us. And by "US", I mean Mr. P., because I know only enough about cars to make me dangerous. If you need axle, gears and other differential work, come here! read more

Had work done on an 05 jeep TJ. Great guys, quality work and fast turn around. I would definitely recommend.

I had AZ diff shorten my rear end and did a great job. When it was time to get the car on the road and the gears set up my friend who owns a shop said "bring it to me, I just hired a good gear guy". My friends shop does amazing custom work but I found out his new gear guy (who's no longer with him) is not a good gear guy at all. I strayed from AZ DIFF and paid the price. I dropped it off with them and they did a great job righting a wrong. Thank you guys. I will never stray again. read more

Did an absolutely killer job on rebuilding and upgrading a custom 12 Bolt Posi rear for my 1970 Pontiac. Bubba is great to work with and just a good guy. The thing with dealing with old cars is that there are so many things that can go wrong it's difficult to find a shop that will treat your fairly and not absolutely punish you for anything they can. Typically, the work is either A) bad (since the car is older and may not be perfect so who cares) or B)- you will get killed price-wise for owning a specialty vehicle, and their skill. They will treat you well, no BS, no games. I 100% will work with only these guys for future needs. Got the rear installed, along with my new control arms, bushings and off I went. Absolutely flawless. read more

Arizona Differential Specialists - Guess which part of the car they worked on? Good guys, for sure. - Auto Repair Near Me - Phoenix, Arizona

Had my truck regeared on 9/12/2023. After 500 miles truck started making noise. They told me to bring it back for them to diagnose. Dropped it off on 11/14/2023 and they said a bearing failed and they replaced. Truck started making noise about 20 minutes after picking up. Called again and they said they would have to see if nitro the manufacturer would warranty out the parts and they would redo the whole job. Nitro agreed. Dropped truck off again on 12/7/2023 and truck was immediately making noise. I spoke with nitro after first repair and they told me that the gears should not make any noise what so ever and for me to have the shop give me the specs that they got the parts set to. when I asked for them to give me those numbers per nitro request they told me no that I can take it to nitro if thats how nitro wants to be. when I picked up the last time they did not have specs for me and also told me if it makes noise again that " I will just have to live with it " and they also told me that they set up the gears to what they know wont make noise they dont set it up to manufacturers specs. I told them I want it set to manufacturers specs not to what they "think' works. after loosing 6 days of work from dropping off and picking up I am no longer willing to deal with this company. read more

Had a bent gslse rx7 rear axle housing that I got off Facebook market and these guys did a great job straightening it out. Would definitely go back this shop for more help with rear ends! read more

Good guys. Initially we had some problems with getting the correct parts installed (due to parts vendor), was handled well and taken care of quickly. Finished up my after-break-in-inspection, all looks good, no noises or weird clunks coming from the diff, overall I'm a happy customer that will come back for more business. read more

The limited slip in my 2013 Wrangler decided to consume itself (1/4in pieces of gear in the oil), so I called some local shops to see what repairs would cost. AZ Differential was willing to work with the differential I suggested and their cost was less than the competitor. I had never had differential work done but I'd heard good things, so chose to process with AZ Differential. Dave was very easy to work with and I had my Jeep towed to their shop on Friday. By Monday, I received a call that the work was done and I could pick it up! Not only that but the actual cost was less (albeit slightly) than the original estimate! Two days' service and they beat their own estimate? Sounds too good to be true but it is!! I don't normally leave reviews on Yelp but felt that this was exceptional and deserved mention. You can be at ease leaving your differential service to Dave and AZ Differential! read more

Straight forward service like the name says it. Good work, finished in a timely and great customer service

If you are looking for this type of work on your vehicle look no further this is the place. They know what they're doing and they let me bring my own brand new parts. They performed my gear upgrade, rebuilt my knuckle installed harder axles. My rig drives a lot better and my lockers engage and disengage whisper quiet. Thank you Dave and crew! read more

I called on 12/2 to setup an appointment to get 4.56 gears and a Detroit Truetrac locker installed. They said bring in on in the next morning and they will get it done within a couple of days. I arrived at about 7:30AM and they were promptly open at 8AM. We talked through what I wanted done and they explained everything. I called back at about 2PM to see if they thought it would be done the same day because they did have several jobs going all at the same time. It ended up being completed by 4PM. Cool bunch of guys work there and will definitely recommend to everyone. Thanks guys. read more

I was referred here by another shop that didn't have the necessary tools for what we needed done. I'll admit, I was a bit hesitant at first. It's a tiny shop- nothing fancy with little to no parking. We brought our vehicle in without an appointment, and they had it ready by midday the following day (I had told them I didn't need it right away). We had gone in expecting to pay near $1000 based on other work we have had done. Imagine my surprise when the bill was just over $200. The only negative was that they are not open weekends, which made it a little difficult for us. But for the service we received, I would return in the future despite that! read more

Update on the 1963 Chevy rear end repair: Still holding up great. No leaks. Thanks guys, read more

These guys are the Best in the business. Great price. Terrific service and Fast Turnaround. I highly recommend. David is Awesome! Five Stars ***** read more

If you need differential work, I highly recommend this place. I have an old '65 F100 pick up. It had an open diff and would sometimes spin the tire on slippery boat ramps. I also pull an old vintage trailer. I figured a posi rear end and some new lower gears were in order. Talked to the guys there and I got a fair quote. When I went to go pick up the truck, they said they ran into a problem. Ugh! Here comes an extra $600 I thought. One of the half shafts was in bad shape. Since its so old, it's not a readily available item. Guess what? Since they've been doing this so long, they had a used one in good shape and just installed it. I was out the door on time AND the same price they initially quoted me. When asked if I wanted to keep the old parts, I said sure, I'll find something to do with them. They took the old gears and half shaft and had a friendly worker completely de-grease them in a parts washer and box them up. That was over and above great service! A year and a half later, my 410 gears and Trutrac limited slip are running perfectly. I wish all places operated this way. read more

Arizona Differential Specialists - A great group of guys, performing quality work at honest prices! Thanks to everyone that works there. - Auto Repair Near Me - Phoenix, Arizona

Had my front differential I have them put 30 spline axles ARB Locker and 456 gears installed they did a great job in a timely manner I would definitely recommend them to anybody great shopping very polite people down to earth thanks to the team at Arizona differential specialists read more

Good communication before, during and after servicing of my GM 12-bolt. After taking the car to them, I took one of the knowledgeable staff members, Jose for a ride in my ride. His inclination was the pinion bearing was the culprit making the offensive noise. I left the car at the business with the promise it would be fixed as soon as possible - within the next couple of days, and It was done by the end of the day! During the course of the repair they called to suggest I consider replacing the axle bearings as well, which I had them do. Their work is professional, the staff friendly, and the repair bill reasonable. AZ Differential Specialists are just that - It is a no-frills shop that gets business done and I would recommend them to anybody. read more

AZ Differential Specialists gave me the best estimate that I could find for rebuilding my transfer case so after reading these reviews I decided to use them. Being on Grand avenue, I was already prepared for an older industrial looking building. Its true they had very little parking and the shop definitely wasn't fancy, but those things really aren't important to me. Bubba, their customer service rep, was very communicative and professional through the entire process and took the time to explain the work they were doing. They were on time with the repair, and even offered a 12 month warranty on all repairs. Overall this was a great experience and I'd gladly refer my family and friends for any work they needed to have done. read more

UPDATE: We continued to have issues with noise in our differential even after Arizona Differential serviced and inspected our differential and told us the ring and pinion looked good with normal wear. We took our truck to the dealer for a diagnostic and they discovered the ring and pinion had excessive wear and backlash was on high side of acceptable tolerances. They also told us whoever serviced the differential last (Arizona Differential) used the wrong gear oil and WAY overfilled which caused the oil to foam. So because they could not diagnose the initial problem and used wrong oil and overfilled during their service - I wont be back myself or recommend them. read more

Dave and the team do great work at an honest price. They completed my differential repair in a few hours, and showed me the failed part. They explained to me what happened and had the parts available to complete the repair. 2005 f150 4x4.thanks AZ Differential Specialists! read more

These folks know how to setup gears! On road or off, street or strip, fast service at a fair price!

Great company! Great Staff! If you ask around in Phoenix AZ DIFFERENTIAL SPECIALISTS is the ONLY PLACE TO GO!! I've known about them for years. So when my company truck blew out the diff you can guess where we went for 5 star service! read more

HIGHLY RECOMMENDED!! I first to my car to another shop and they told me the gears needed replaced = $1,500. I then called AZ Differential and they said they could do it cheaper. Went down there and they test drove it and said pretty sure it is only the bearings. They took it apart and it was only the bearings = $600. Got to love an honest shop! Granted the shop may not look the best on the outside but the "prettier" shops have to pay for the somehow = taking advantage of customers. read more

How often do you go to a repair shop and leave with more done than you expected for less than you were quoted? I came in for a gear swap in my truck and they fixed my broken exhaust hanger for me and I spent about $100less than expected. Thanks to the staff at AZ Differential Specialists. I will recommend to all of my friends and family. read more

For years I had differential problems that several mechanics mis-diagnosed. Then, thankfully, I found Bubba and Jose at AZ Differential Specialists on Grand. I don't believe in giving good reviews until the product or service has past the test of time. I'm writing this now because I've driven my truck over 25,000 miles since their repair, and everything is humming like brand new. Thanks guys... read more

I took my car to the Ford Dealer in Peoria for an install of a new differential. When I got it back it whined and sang at highway speeds. I complained to the service advisor who said his differential guys do all the installs and he would talk with them. The next contact the advisor told me that the tech said "they all do that." I visited the dealer to find out more. The service advisor walked me back to speak to the tech. The tech told me if he tried to adjust it more it would just get worse. I left not happy. Then I went to an auto parts (O'Reilly) store next to Ace hardware on Indian School to see if there was some oil additive that might help. The people in the auto parts store said the guys at AZ Differential Specialists could help me. Cutting to the chase the AZ Differential Specialists reworked and RandR'd the differential over a 3 day period so that it is just as quiet as new when I ordered it from the factory. Kudos to AZ Differential Specialists. "I am not worthy." The Ford Dealer techs obviously don't know what they should know. read more

I took my carrier bearing in to be rebuilt and learned that I only needed a clutch pack to get it running again. When i went in to pick it up, I was educated on how to properly install it, including the specs. The repair was completed on time and I could tell that the parts had been cleaned thoroughly. I would recommend these guys to my family and friends. Definately going back again should I have a similar issue with another vehicle. Cheers! read more

I took my 1971 Chevy truck to this shop and I would highly recommend this shop. They got the work done quickly and efficiently I am very satisfied and will be coming back anytime I need differential work done, read more

I called in and they gave me an excellent quote and stuck right to it! No additional charges or hidden fees like some of the competitors. Thanks Bubba! read more

Good people, good prices, great work. It's not to often you find this combination, they have always treated people right & their knowledge is unmatched. read more

Our family was on an RV trip out West when the differential in our Chevy Avalanche starting making a roaring noise in the rear. AZ Differential assessed the noise as coming from the differential, made the necessary repairs and we were able to resume our RV trip with only a slight delay. They were efficient and professional helping us complete our vacation without any further differential problems. read more

Had to fix an axel seal leak and rear differential. I dealt with Bubba who gave me a great deal and got the job done within 24hrs. Couldn't be happier with the service and my truck is running great now! read more