Tri-County Transmissions & Automotive, LLC is more than a transmission shop - we are a full-service automotive repair facility. From engine diagnostics and exhaust repairs to electrical faults and cooling system failures, our certified technician brings the same precision and honesty to every repair that has made us Morris County's most trusted drivetrain specialists.
What's Included
Our Automotive Repair Process
Advanced Diagnostics
We connect professional scan tools to your vehicle's OBD system to read live data, fault codes, and sensor outputs across all modules - engine, transmission, ABS, TPMS, and more.
Engine Repair & Service
From misfires and oil leaks to timing chain issues and sensor failures, we diagnose and repair engine problems accurately using quality OEM or OEM-equivalent parts.
Exhaust System Repair
Exhaust leaks, failing catalytic converters, and O2 sensor faults all trigger warning lights and hurt fuel economy. We locate and repair exhaust issues from the manifold back.
Electrical System Diagnosis
Modern vehicles are as much computer as car. We diagnose charging system faults, faulty sensors, wiring issues, and module failures with precision - not trial and error.
Cooling System Service
Overheating is one of the fastest ways to destroy an engine. We inspect and service water pumps, thermostats, radiators, hoses, and coolant to keep your temperatures in check.
HP Tuners Calibration
As an authorized HP Tuners partner, we can recalibrate engine and transmission control modules for optimized performance, efficiency, and drivability after major repairs.
Signs Your Vehicle Needs Automotive Repair
Modern vehicles communicate problems through lights, sounds, and feel. Don't ignore these signals - they only get more expensive over time.
- Check Engine or Service Engine light on
- Rough idle, misfires, or engine hesitation
- Decreased fuel economy
- Unusual smell - burning oil, fuel, or coolant
- Smoke from under the hood or exhaust
- Overheating or temperature gauge running high
- Electrical components not functioning properly
- Noise from the exhaust or engine bay