These guys always deliver! Any issue I have, they always investigate to find the root cause. Very reputable, reasonable, and never make you feel like youre being taken advantage of. Lets not forget that they build a phenomenal transmission! Ill never go anywhere else in the valley.

Matt, Dave and crew are all top notch. the quality and care they put into each transmission is unmatched. They are straight forward, they will tell you what they recommend and why you need it. LISTEN TO THEM !! I just had the put a trans in my 2006 Mega cab diesel. shifts like a dream and pulls like never before. May sound weird, but the low stall converter they recommended and installed actually gave my truck noticeably more power. I could not be happier and will highly recommend them. Also just had them build a turbo 400 for a old muscle car project. THANKS GUYS !!!! JC

Replaced a stock clutch with a heavy duty one. Everyone was very professional & great to work with. We are return customers & will be back again as needed!

So I am back for the 3rd time which brings me to integrity. Integrity means doing the right thing even when nobodys looking, like putting in all the parts promised with a refresh. So Im hoping to be able to change my rating and update this review with a reliable running transmission that I paid for.

Great shop, great group of guys. They are always willing to help out with anything even if its just asking questions. Super helpful, super cool establishment

I have had 1 (the first time) good experience and 2 bad. Unfortunately I would much rather send my stuff elsewhere and pay shipping. Hope they get whatever figured out and do better.

Great shop. They have fixed a wide variety of vehicles for me. US, Japanese and German made cars and trucks. Dave finds the answer to every issue I have had. Great shop to work with.

They did the transmission on my truck in a reasonable amount of time and quality work for a great price. They were also quick to answer all of my questions that I had. I would recommend them any day😊

Dave personally worked on my 01 Dodge ram pickup, he changed the fuel pump the fuel injector pump and did an amazing job.Great pricing good friendly service what more could you ask for.

Id never take my truck anywhere else for transmission work. Everyone down at ultimate are awesome and know their stuff. Had a 48re tow series installed in my 2006 Dodge and it has been amazing.

Had my truck towed to them on a last minute notice on a hectic day and they got to it that day and was repaired the next day. Honest and very informative guys there. They treat you like a friend not a customer. Fair prices and great service. Thanks a million guys!! Hard to find customer service like this anymore!

Absolutely amazing service and great guys that work there. Have always taken good care of me and made sure I always got the best quality parts. I will always use ultimate trans for any vehicle I own. Dave and Jake are absolutely great guys and always treat me well

Didnt have any work done but they were very knowledgeable about what I needed to know.

These dudes are great for Allison transmissions. Brought in my 250k mile ‘06 Duramax with a toasted transmission. They have rebuilt Allisons sitting on the shelf so they were able to get it done quickly. They had the knowledge to recommend upgrades and they do the rebuilds in house giving them a super competitive price.

So so thankful for these guys! Our truck went in limp mode while we were on a road trip, we were stranded in Boise and these guys made time for us to figure out the problem. They were understanding and very personable, and KNOW what theyre doing!

Great customer service!!! Super knowledgeable, made our repair there priority. Top notch!

Knowledgeable, timely, efficient, and didnt destroy the pocket book. What more can you ask for?

We have a fleet of Trucks/Vans that we send to Ultimate Transmission whenever we need maintenance or repairs done. They are very thorough and take great care in making sure they find anything that might be wrong and get it fixed in a timely manner so we can get them back on the road. I like the updates I get via email on when service is due. They have the best mechanics in town and are extremely knowledgeable. We would not take our fleet anywhere else. 5 stars from All Valley Fire Inspections & Services!

Glen is awsome and has very reasonable prices. Would recommend him!

Pretty thorough. Only downside is they drove 200 miles in our truck to try to figure out what was going on and didnt put gas back in it.

Incredible work and very professional!

They know their business and their business is your vehicle. In addition to their expertise in transmissions, they have skillfully accomplished other general repairs and service on my vehicles. I can trust them, if they say something needs repaired I know it is required. Equally important, Ultimate does not sell repair work or service that is not required.

Very very good I recommend them all the time to I absolutely appreciate what they do ☺️

Great customer service!

They specialize in performance transmissions, and really know their stuff. While they can rebuild a transmission to stock, their labor rate is rather high, so you might want to roll the dice on a cheap reman elsewhere. But if you need a transmission to hold far more power than stock, and to last, it is money well spent. They use high quality parts (which are not cheap) and have the knowledge to put them together to last. But you do pay for that knowledge and skill-- dont expect them to be cheap, but they can put together a great transmission.I had gone through 2 performance Allison builds from supposedly reputable builders before bringing my truck to Ultimate. The transmission has been flawless, and at a higher power level than before. Ive come back for every other built transmission Ive needed for my projects, and I have not been disappointed.

Great service, great people

These guys have nothing but talent and with no lack of tooling are prepaired to service your drivetrain in the most serous way transmission extraordinaire built with what has proven the test of time. I expect great things from these guys watch them grow.

Ultimate Transmission is, in my opinion, the ultimate transmission shop in the Boise area. Dave and his brother know transmissions and are more than happy to give transmission advice and answer any questions you may have.Very few shops are willing to work on performance diesel transmissions. Ultimate Transmission is so confident in their work that they offer an unlimited mile 3 year warranty, or if you are racing your vehicle (including drag racing diesels) you get an unlimited mile 2 year warranty. If you do drag race, youll run into Ultimate Transmission at the track racing their personal vehicles. That says a lot right there.

Dave and his team are experts in their trade! They were fairly priced and worked hard to get us taken care of with the replacement of a transmission in one of our vehicles almost a year ago. Recently I had a situation where I was hunting, struck on the top of a mountain and broken down. Without having the truck in front of him Dave was able to give us several options and solutions to get us and our vehicle home safely. Thank you!

Matt/Jake are really on top of their game. Took in an old NP208 tcase and they helped give me some options on replacement to get my truck rolling again. Great communication from the team and they are quick about it.After I got the rebuilt tcase in, it had a small leak. Took it back in and they had it done in a day and back to me. Also, helped check a couple other items for me and gave great recommendations on who they would take it to. Appreciate the extra mile taken!

Highly recommend this shop!

Let me tell you Matt and Dave go above and beyond to solve your transmission issues. They built a transmission for my Dodge Ram to handle performance mods and towing. Seven months after the fact, I was having some minor issues and they stood solidly behind their work and addressed every concern. You will not find more honest guys that are passionate about pleasing their customers. I have sent friends to see Matt and Dave and would not hesitate to do so in the future. Thanks guys for being real and honest!

Great company great group of guys kept me up to date on everything going on with my truck and answered all and any questions my wife and I had on what had to be done. Highly recommend this shop to any and everyone.

I appreciate the guys taking the time to really explain the scope of work with me. I then know what needs to be done and trust that they are doing the best service for me.

Superb expertise, stand behind their work and really, REALLY, care for ther clients. Ratem 6stars + if I could. THEY GO THE EXTRA MILE

Brought my aging 2004 RAM 4x4 to Boise from Bend, OR to have the transmission upgraded to their TOW package. I opted to use my existing case and they spent 4 days on the transmission, driveshafts and even replaced the rear main seal on my Cummins. They explained the work they were doing and the parts they were using. Complete PROS!

Knowledgeable and helpful. They rebuilt the transmission in my Jeep then, after I installed it, reprogrammed the system for me. Great service!

Thank you Jake for all your help getting my torque converter rebuilt on my old Dart. I recommend these guys for all transmission work.

I gave this place FOUR chances to get the transmission I bought from them working properly. Not only has it leaked transmission fluid constantly since the first time they had it, but they charged my debit card over $600 the FOURTH time they tried to fix it (after I already paid over $2200 for the transmission in the first place). I finally got so tired of wasting my time and being taken advantage of that I junked their transmission and bought a new one ELSEWHERE.Rude, condescending owner and staff that doesnt stand by the work they were paid for.

I dont know what else I can say about these guys other than they are absolutely amazing and their customer service is really top notch. I needed a new NV4500 for a tuned 12V Cummins and after talking with them, they recommended a build for me and I drove the two hours up to Boise to pick it up. Came back home, installed it and took it for a test drive. Transmission shifted great but when I got back I noticed there was a small hairline crack in the aftermarket aluminum tailhousing. I phoned them up and they said to bring the truck up. Drove up the next day and they replaced the entire transmission for me with a new unit with a cast iron tailhousing. Everyone in the shop seemed to want to jump to help me out--they pulled my truck in the bay as soon as i pulled up and treated the warranty as if it was one of their installs. I think I counted like 3 guys working on my truck. Went home that day with a brand new unit installed professionally and ready to roll. Shifts are buttery smooth and I couldnt be happier. No better place in the Mountain West for diesel transmission work. THANKS GUYS!!!

These guys are as good as it gets. Highly recommend. Matt was great to work with.

These guys will not cheat and bleed you. Cant say the same for the Double A - Maco shark people.

They are willing to make things right!

Good guys

I took my 74 Scout to these guys following an attempted replacement of the flex plate by a local diesel shop which left my rig barely driveable.These guys were incredible; they fixed the shiftpoints, drivelines, replaced a number of leaks, transmission pan, plus more and stuck with the initial quote for parts & labor on a classic vehicle that has had a full after-market diesel engine swap + re-built trans (so you can appreciate the unforseens they encountered and were able to diagnose & repair). These guys really were professional and knowledgeable. Really appreciate their integrity, feedback and service. Would absolutely recommend these guys to anyone...they are busy for a reason!

Always great as usual

Great people and they have there stuff together

Because my husband Francisco is the best Allison specialist for Ultimate Trans. in all of Idaho.

Bought my first trans for my Powerstroke back in 2010 from Dave and Matt. I did have a problem when I first installed it. Some idiot(ME) did not get the torque convertor seated all the way into the pump and cracked it when first installed. I showed up to there shop unexpedly Monday morning and they jumped right on it and fixed my screw up. I was on the road by noon headed back to Utah. Transmission has been great. I currently have about 70k miles on it I have had a trailer hooked to it for probably 50k of those miles. I have since bought several more transmission from them.

Good products and great service.

These guys are good!