Replacement
Professionally remanufactured transmission replacement for many modern cars, trucks, SUVs, vans, and commercial applications.
About Integrity Transmission & Drivetrain
A transmission business built from the inside out.
Integrity Transmission & Drivetrain grew from hands-on transmission work into a business built around helping customers make better decisions when one of the most expensive systems in their vehicle fails.
We rebuild transmissions, source professionally remanufactured replacements, coordinate complete transmission jobs, and help customers understand which option actually makes sense for their vehicle.
Meet The Owner
William Hullinger
Owner • Integrity Transmission & Drivetrain
I'm William Hullinger, the owner of Integrity Transmission & Drivetrain. My experience with transmissions didn't come from sitting behind a counter selling parts. It came from taking transmissions apart, finding out why they failed, rebuilding them, solving problems, sourcing hard-to-find components, and learning firsthand how much detail goes into getting one right.
Working inside transmissions also taught me something important: rebuilding isn't automatically the best answer simply because a transmission can be rebuilt.
Sometimes rebuilding the customer's original transmission is the right repair. Other times a professionally remanufactured transmission can provide a more comprehensive product, a stronger warranty, or simply better value for the money.
That experience shaped what Integrity is today. Instead of forcing every customer into one repair model, I want to be able to look at the vehicle, understand how it's used, compare the available options, and recommend the path that actually makes sense.
How Integrity Evolved
The more transmissions you work on, the more you realize there isn't one right answer.
Transmission rebuilding gives you a unique view of what actually happens inside these units. You see burned clutch packs, failed converters, worn valve bodies, damaged drums, broken hard parts, contamination, hydraulic problems, and the common weaknesses that show up repeatedly in certain transmission families.
You also see how quickly the economics of a rebuild can change when hard parts, electronics, hydraulic components, and other damage are added.
Over time, that made one thing increasingly clear: a good transmission business should not be limited to saying, “We rebuild transmissions.”
Customers should have access to rebuilding when it makes sense, remanufactured replacement when that provides a better product, upgraded builds when the vehicle demands more, and straightforward guidance when the right answer isn't immediately obvious.
Integrity Transmission & Drivetrain was shaped around that broader approach.
Integrity Today
More than one way to solve a transmission problem.
Today, Integrity works with customers across a broad range of automatic transmission applications.
Depending on the vehicle and situation, that may mean sourcing and installing a professionally remanufactured transmission, rebuilding the original unit, performing a bench rebuild, planning a towing or performance build, or helping determine whether the problem is actually inside the transmission at all.
The business model is deliberately flexible because the right repair for a late-model daily driver may be very different from the right repair for a classic car, diesel work truck, towing vehicle, or modified street build.
Rebuilding
Traditional and upgraded rebuilds for transmissions where rebuilding provides the right combination of cost, repairability, and durability.
Custom Builds
Longevity, towing, heavy-duty, street-performance, and higher-power builds tailored around the transmission and intended vehicle use.
What Matters Here
Keep the repair understandable.
Transmission work is complicated enough. The relationship with the customer doesn't need to be.
Straight Answers
If rebuilding makes sense, we'll explain why. If replacement provides better value, we'll explain that too. The goal is to give the customer enough information to make a confident decision.
Technical Understanding
Transmission decisions are easier to make when you understand what fails inside the unit, what can be corrected, and what the available alternatives actually provide.
Stand Behind The Product
Warranty matters. We make a clear distinction between Integrity's rebuild warranties and the nationwide warranty programs available with qualifying remanufactured transmissions.
Local Business • Southwest Missouri
Serving Springfield and the surrounding communities.
Integrity Transmission & Drivetrain serves customers throughout Springfield, Ozark, Rogersville, Nixa, Republic, and surrounding Southwest Missouri communities.
Being a local business means our reputation matters. A transmission job isn't finished when the invoice is paid—the way customers feel about the experience afterward matters too.
Want To Know More?
We've separated the technical details so you can go as deep as you want.
The About page tells you who we are. The rest of the site explains how the transmission side actually works.
Services
See what we do
Transmission replacement, rebuilding, installation, drivetrain, and selected automotive services.
Transmissions Explore transmission familiesLearn about GM, Ford, Ram/Dodge/Jeep, import, and other automatic transmission applications.
Rebuild Guide See how we build themSoft parts, hard parts, testing, common failure corrections, towing upgrades, longevity builds, and performance options.
Warranty Compare the coverageUnderstand the difference between Integrity rebuild warranties and qualifying nationwide remanufacturer coverage.
Customer Experience
See what customers have to say.
The best explanation of how a business treats its customers usually comes from the people who have already worked with it.
Need Transmission Help?
Start with your VIN and tell us what's happening.
You don't need to know whether the vehicle needs a rebuild, remanufactured replacement, or something else before reaching out. Send the information and we'll help you figure out the next step.