Read Automatic Transmission Pressure at the Test Port
The AUTOOL PT650 connects to the transmission’s pressure test port through a matching copper adapter and oil-resistant hose, then shows current, maximum, minimum and differential pressure with measurement time. It is intended for transmission pressure only.
- 0.5% FS Accuracy
- Max / Min / Differential
- PSI / Bar / kg/cm²
- 12 Adapter Types
- 4 × AAA Powered
Key Features
-
Full Pressure Picture on One Screen
The backlit display shows live pressure next to the maximum, minimum, difference and elapsed time.
-
Hold, Lock and Zero
Interface lock, data hold, data clear, test-time reset and pressure zeroing before measurement.
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Riveted Copper Adapters
Hard, wear- and oxidation-resistant fittings for varied transmission test ports.
-
Oil-Resistant Transfer Hose
Connects the measuring probe to the selected adapter for transmission-pressure work.
-
Unit Switching
Switch between PSI, bar and kg/cm² to match the service data you are working from.
What’s in the Box
- PT650 gauge with measuring probe
- Carrying case
- Oil-resistant transfer hose
- Connector set (12 types)
- User manual
How to Use
- Remove the main pressure plugTake out the main oil pressure plug on the transmission housing per the vehicle service procedure.
- Fit the adapterChoose the adapter that matches the vehicle and connect it to the measuring probe.
- Zero the gaugeLong-press zero/clear until real-time pressure reads 0.
- Connect to the transmissionSecure the probe and hose to the pressure test point.
- Start and shiftStart the engine and shift gears as the test procedure requires.
- Read and recordRead pressure at the gear, temperature and engine-speed condition the procedure specifies.
Measurement, adapters, zeroing and troubleshooting: PT650 user manual (PDF)
Good to Know
Caution
- For transmission pressure only; do not use it on cylinder, engine oil, fuel, GDI fuel or brake systems, and do not exceed its intended pressure range.
- Shut down with a 2-second press of the power button only after the gauge has returned to atmospheric pressure.
Care
- Fit the batteries with correct polarity and close the cover securely.
- Check tightened parts regularly, keep the tester away from corrosive liquids and store it dry and ventilated.
- Replace aging wires or worn parts that affect safe use.
FAQ
Does PT650 store test data?
No. It can hold, lock and clear the current reading, but it does not store records.
Which AUTOOL gauge should I use for other systems?
PT610 for cylinder pressure, PT620 for engine oil, PT630 or PT635 for fuel, PT640 for GDI fuel and PT660 for brake pressure.
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