708-500-5281 
Your transmission is what keeps power moving from the engine to the road, and when it starts failing, everything suffers. If your truck is slipping gears, grinding, shifting hard, or losing pulling power, West 66 provides dependable manual and automatic transmission repair for heavy-duty makes and models.
Transmission
Complete Transmission Services
We handle a full range of heavy-duty transmission work, including:
Clutch Services
- Clutch replacement
- Clutch adjustment
- Hydraulic clutch system service
- Pilot bearing replacement
- Clutch brake replacement
Manual Transmission Services
- Gear and bearing replacement
- Synchro repair
- Transmission rebuilds
- Input and output shaft repair
- Fluid service and maintenance
Automatic Transmission Services
- Gear and bearing replacement
- Diagnostics and troubleshooting
- Solenoid and valve body service
- Transmission control module issues
- Complete transmission replacement
- Fluid service and replacement
Fast, Reliable Transmission Repair
From clutch adjustments to full rebuilds, we help keep your truck shifting cleanly, pulling properly, and staying road-ready.
Signs Your Transmission Needs Service
Bring your truck in if you notice:
- Gear slipping or trouble shifting
- Grinding or clunking noises
- Transmission overheating
- Fluid leaks under the truck
- High RPM with low pulling power
- Delayed engagement
- Vibration during acceleration
- Transmission warning light
How the Process Works
From the first diagnostic check to the final verification, we follow a clear, efficient process built to reduce downtime and get your truck back to work faster.
Process steps
- Initial transmission inspection and assessment
- Clear recommendations and work approval
- Professional diagnostics and repair
- Final quality and system check
- Ready for pickup and back on the road
Why choose West 66
Certified heavy-duty diesel technicians
Complete clutch service—from diagnosis to replacement
We explain your options—repair vs replace
High-qualit OEM parts only—no aftermarket shortcutsy oil + OEM-approved filters
Frequently asked questions
Common warning signs include slipping gears, delayed engagement, grinding or clunking noises, overheating, fluid leaks, vibration during acceleration, or high RPM without strong pulling power. If shifting feels off or performance drops, the transmission should be inspected before the damage gets worse.
Yes. West 66 services both manual and automatic heavy-duty truck transmissions. That includes clutch work, diagnostics, internal component repairs, rebuilds, solenoid and valve body service, control-related issues, and complete replacement when the transmission is too worn or damaged to repair.
Yes. Low, dirty, or degraded transmission fluid can affect lubrication, cooling, and shift quality. Over time, that can lead to overheating, slipping, internal wear, and more expensive repairs. Catching fluid-related problems early can help protect the transmission and avoid unnecessary downtime.
A clutch should be inspected when you notice slipping, hard shifting, poor engagement, unusual noise, or reduced pulling power. These signs often point to wear that can worsen quickly. Addressing clutch issues early can help prevent added stress on related transmission components.
It is risky. Driving with shifting problems, slipping gears, overheating, or fluid leaks can increase internal damage and turn a smaller repair into a major failure. Getting the truck inspected early gives you a better chance of limiting downtime, cost, and repair complexity.
Testimonials What Our Customers Say
Contact Us
Have a question or need a quick quote? Send your truck or trailer make, model, year, and a description of the issue, and we’ll get back to you as soon as possible.
Contact Information:
Phone:
708-500-5281
Email:
[email protected]
Location:
Address
198 W Laraway Rd, Joliet, IL 60436, United States
Opening Hours:
Mon – Fri:
7:00 AM – 5:00 PM
Saturday:
7:00 AM – 12:00 PM
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