Lisle Ford Transmission & Oil Cooler Quick-Disconnect Tools 39100 — 2-Piece 3/8" & 1/2" Stepped Spring-Disconnect Set

Two stepped spring-disconnect tools (3/8" and 1/2") made by Lisle to remove Ford transmission/oil cooler quick-connect lines quickly and without damage.

This two-piece Lisle 39100 set is engineered specifically for Ford transmission and oil cooler quick-connect fittings. Each tool uses a stepped profile to engage the spring connector inside the coupler, allowing you to push the line toward the fitting, engage the tool around the hose, and withdraw the line cleanly. The pair covers common Ford sizes so you won’t need improvised adapters or risk marring fittings during service.

Which Ford vehicles and fittings will these disconnects work on?

Use the 3/8" tool for many mid-size Ford and some Cadillac models, and the 1/2" for heavy-duty pickups. These sizes match the internal collars of factory quick-connect couplers, so they’re suitable for the listed model years when used as intended.

• 3/8" tool: 2003–2010 Ford V8 Explorer; 2004+ Ford F-150; Cadillac CTS (check fitment).
• 1/2" tool: Ford Super Duty pickups—F-250, F-350, F-450 models with factory cooler lines.
• Designed for common OEM transmission/oil cooler quick-connects on affected Ford/Cadillac vehicles.

How do you use the Lisle 39100 disconnects safely and effectively?

Operation is straightforward: push the hose toward the connector to compress the internal collar, slip the correct-sized Lisle tool around the line, and pull the hose free. Using the correct size prevents damage to the plastic or metal connectors and speeds line removal.

• Start with depressurizing and draining fluid as needed for safe access.
• Push the line into the fitting, seat the stepped tool, then pull straight out to disengage.
• If it resists, re-seat tool and confirm correct diameter before applying more force.

What are the build details and advantages of these stepped tools?

Each disconnect features a stepped profile sized to engage the internal snap collar of Ford quick-connects. The compact, simple shape fits tight engine bays and reduces the chance of slippage compared with improvised tools.

• Two sizes included for broader vehicle coverage—3/8" and 1/2".
• Stepped design aligns with OEM connector collars for positive engagement.
• Low-profile shape works in confined spaces common around radiators and transmissions.

Who this is for: The Lisle 39100 set is ideal for DIY mechanics, fleet technicians, and professional shops that service Ford and select Cadillac models with factory transmission/oil cooler quick-connect fittings. If you regularly remove or replace cooler or transmission lines on the listed vehicles, this compact kit helps you work faster and with less risk of damaging connectors.