J & J Transmissions is the leader in Belle Vernon ~ Charleroi ~ Dunlevy Pennsylvania SUV and 4-Wheel (4x4) transmission service and repair. Our Belle Vernon ~ Charleroi ~ Dunlevy Pennsylvania SUV and 4x4 service includes the draining and refilling of your vehicle's transfer case and differentials with clean fluids and a thorough inspection of your vehicles underneath by one of our professionally trained transmission service professional mechanics.