Transmission Repair & Rebuilding
Slipping, harsh shifts, limp mode or no movement at all — we diagnose the cause before recommending a repair. MBN Auto Diesel services domestic automatic transmissions behind gas and diesel engines for drivers across the Phoenix metro.
What we do
- Transmission diagnosis with scan data, line pressure testing and a road test
- Valve body, solenoid, sensor and internal harness repair
- Complete rebuilds with clutch, band, bushing, bearing and seal replacement
- Torque converter replacement and cooler flushing after a failure
- Remanufactured unit installation when that is the better outcome
- Fluid and filter service based on your actual duty cycle, not a generic interval
Transmission families we service
Each page covers common applications, symptoms, how we diagnose that unit and what a repair involves.
Symptoms worth bringing in
- Slipping, flaring or rising engine speed without acceleration
- Harsh, delayed or clunky engagement into drive or reverse
- Shudder at steady cruise speeds
- Missing gears, limp mode or a transmission warning message
- Burning fluid smell, red fluid leaks or fluid on the driveway
- Whining, humming or grinding that changes with gear
Questions we get
Do you diagnose before quoting a rebuild?
Yes. We road test, scan and pressure test first. A meaningful share of transmission complaints turn out to be a solenoid, valve body, wiring or fluid issue rather than a full rebuild.
Do you rebuild transmissions in house?
We diagnose, repair and rebuild automatic transmissions for domestic cars, trucks and diesel applications. When a remanufactured unit is the better outcome for your vehicle, we will say so.
How do I know which transmission my truck has?
We identify it by VIN, RPO or tag before quoting anything. Several models used more than one transmission depending on year, cab and engine.