The Mack shift knob and airline kit, part number 20QE3333A-3764 or 20QE3333A3764, services Mack transmissions equipped with 2- and 3-airline shift knobs. The kit supplies three 10-foot, 3/16-inch airlines in red, black, and blue, plus two 90-degree push-in swivel fittings and one straight push-in fitting for the slave valve ports. Because the fittings are push-in style, installation does not require removal of the slave valve. This matters operationally: over-tightening the original threaded fittings on the slave valve is a known cause of synchronizer damage. The fourth port in the knob is an exhaust port; it can be left open or routed below the cab floor using one of the old lines. The shift knob features a blue thumb button. Nine colored pull ties are included for routing the airlines. Call us to confirm proper fit for your specific Mack transmission application.
Features
Fits Mack transmissions with 2- or 3-airline shift knobs
Includes three 10-foot 3/16-inch airlines: red, black, and blue
2 push-in style 90-degree swivel fittings and 1 straight push-in fitting for the slave valve
Push-in fittings eliminate slave valve removal during installation
Prevents over-tightening of slave valve fittings, reducing risk of synchronizer damage
9 colored pull ties included for airline routing
Blue thumb button shift knob
Tech Specs
- KIT CONTAINS:
- 10' Red 3/16 airline.
- 10' Black 3/16 airline.
- 10' Blue 3/16 airline.
- 2- 90* 3/16 NEW push in style 90-degree swivel fittings.
- 1- Straight 3/16 NEW push in style fittings.
- 9- Colored pull ties
