Feel a delay when shifting? Hearing odd sounds during gear changes? These early signs point to transmission trouble. Explore how heavy-duty transmission repair brings back smooth power and protects your driveline investment.

Semi Truck Transmission Repair in Mount Horeb, WI
When your truck’s transmission is not working right, you’ll feel it. Delayed shifts, gear slippage, and burning smells are just a few signs you need immediate attention. At River Valley Diesel Services & Construction, we provide full-service repair and diagnostics for all types of transmissions, including manual, automated manual (AMT), and automatic systems.
Our service includes:
- Complete transmission rebuilds and replacements
- Manual, automatic, and AMT systems
- Worn clutches and clutch adjustment
- Flywheel and pressure plate replacement
- Damaged gears or synchronizers
- Transmission fluid change and filter service
- Diagnostics for transmission slipping or overheating
Don’t ignore warning signs like hard shifting, gear grinding, fluid leaks, or transmission overheating. These can lead to catastrophic damage if left untreated, leading to expensive repairs and extended downtime.
We’ll inspect your system, diagnose the problem, and get you back on the road with dependable results.
Experience the River Valley Difference!
Service Multiple Trucks at Once: We’re equipped to work on up to six trucks at once, helping you get faster service even during busy weeks.
Customer Service Focus: From the first call to the final repair, you’ll get clear updates and a team that respects your time and priorities.
Transparent Pricing: You’ll always get upfront, honest pricing. No hidden fees, surprises, or needless upsells; just straightforward service you can trust.
Easily Accessible: Located in Mount Horeb, WI, right off I-94 and I-151, we’re easy to reach whether you're local or passing through.
FAQs
How can I get heavy-duty transmission repair?
Need heavy-duty transmission repair or truck clutch repair you can trust? Call 608-574-5785 today. We’ll get you scheduled fast and make sure your truck keeps running strong, mile after mile!
How long will a rebuilt transmission last?
A rebuilt transmission in a heavy-duty diesel vehicle can last 200,000 to 300,000 miles with proper maintenance. Lifespan depends on driving conditions, load weight, and service quality. Regular fluid changes and avoiding excessive strain help extend its durability and performance.
What could be mistaken for a bad transmission?
Symptoms like clunking, poor acceleration, vibrations, and difficulty shifting in heavy-duty diesel vehicles can be mistaken for transmission issues but may actually stem from bad axles, worn driveline components, or differential problems. A thorough inspection is essential to accurately diagnose the source.
What areas do you serve for heavy-duty transmission repair?
We are based at 3200 Hwy 78, Mount Horeb, WI, near I-94 and I-151.
As well as Mount Horeb, WI, we also proudly service the following areas: Madison, WI; Janesville, WI; Wisconsin Dells, WI; Beaver Dam, WI; Fitchburg, WI; Middleton, WI; Sun Prairie, WI; Verona, WI; Stoughton, WI; Baraboo, WI; Portage, WI; Lake Delton, WI; Reedsburg, WI; Dodgeville, WI; Monroe, WI; Columbus, WI; Fort Atkinson, WI; Waunakee, WI; and Evansville, WI.
Contact Us About Truck Transmission Repair Now: Call 608-574-5785!
If you're struggling with shifting or power delivery or suspect a worn clutch, call 608-574-5785 today. We’ll handle your truck transmission repair quickly, reliably, and with the quality your business depends on.
What They're Saying About Us
See why our customers consider River Valley Diesel Services & Construction their go-to repair shop in Mount Horeb, WI and the surrounding areas!
I was in a jam and they came out and got me fixed up quick I would definitely recommend them if you’re in a jam
Contact Us
Need roadside assistance, have questions, or want to schedule your truck or trailer in for a service or repair? Get in touch, we're open Monday through Friday from 7:00am to 5:00pm.