JF011E Overhaul Kit 2007-2019

If your Dodge Caliber, Jeep Compass or Patriot, Nissan Altima, Sentra or Rogue, or Mitsubishi Outlander is weeping fluid around the side cover or engaging late into Drive on a cold morning, the JF011E behind it probably needs new rubber, not a whole new transmission. This new JF011E overhaul kit, carried for 2007-2019 under reference K73900G, is the reseal package a shop or careful home builder uses once the case is apart.

What the overhaul kit does in a JF011E

The JF011E is Jatco's push-belt CVT for 2.0 and 2.4 liter front drive cars. A steel belt runs between a primary and a secondary pulley, and hydraulic pressure behind each moveable pulley half squeezes the belt and changes the ratio. Ahead of the pulleys sits a small planetary with a forward clutch and a reverse brake. Every one of those circuits depends on a seal: the pulley pistons, the clutch and brake pistons, the Teflon rings on the rotating shafts, the O-rings between the valve body and case, and the large pan and side cover gaskets. When those harden and shrink with heat cycles, pressure bleeds off, the pump works harder, the fluid runs hotter, and the belt clamp drops. The listing photo shows the pan and side cover gaskets, the metal-clad lip seals and several labeled bags of O-rings and sealing rings. Frictions, steels, filters and hard parts are not pictured, so budget for them separately.

Symptoms that point to tired seals

• Fluid seeping from the side cover, oil pan, axle seals or the input shaft area
• A pause of a second or more before Drive or Reverse engages, worst when the car has sat overnight
• Engine speed flaring under load once the fluid is fully warm
• CVT overheat warnings or reduced power on long grades as internal leakage builds heat
• Low pulley or clutch pressure on a gauge even though the pump and valve body check out

How to confirm before buying

The JF011E is known for belt and pulley wear, pulley bearing noise and valve body faults, and none of those are fixed by seals. Put a gauge on the line pressure and clutch taps before teardown. A whine that rises with road speed and steel fines on the magnets point to pulley bearings. Ratio or step motor codes and shudder point to the valve body. Sonnax publishes a vacuum test procedure for the JF011E valve body that separates bore wear from leaking seals. Our CVT slipping under load guide and the Jatco CVT problems and fixes guide cover how to narrow it down.

Fitment, 2007-2019

The kit is listed for JF011E units built from 2007 through 2019. That transmission was also sold as the RE0F10A in Nissan models and as the F1CJA in Mitsubishi models, and it went into the Caliber, Compass and Patriot on the Chrysler side. Later years only apply to vehicles that kept the JF011E; many Nissan and Mitsubishi models moved to the JF015E, JF016E or JF017E, which are different transmissions with different seals. Check the tag on the case before ordering, compare your old pan and side cover gaskets to the photo, or send us your year and VIN and we will check it for you. More parts for this unit are on our CVT parts page.

Install notes

• Lay the valve body out in order as it comes off and keep track of the ratio control linkage so it goes back the way it came out.
• Soak rubber piston seals and lip seals in clean CVT fluid, coat Teflon sealing rings with assembly gel, and air check the forward clutch, reverse brake and both pulley chambers before closing the case.
• Inspect the pulley bearings while you are in there. If any feel rough, the JF011E pulley bearing kit goes in at the same time.
• Replace the filters and pan gasket set with the JF011E filter and pan gasket kit, and flush or replace the cooler so old debris does not return.
• Refill with the CVT fluid the vehicle maker specifies: Nissan NS-2 in Nissan applications, and the factory CVT fluid named for Dodge, Jeep or Mitsubishi versions. Set the level at the specified fluid temperature.

Is the JF011E the same transmission as the RE0F10A?

Yes. JF011E is Jatco's code, RE0F10A is Nissan's code for the same CVT, and Mitsubishi calls its version F1CJA. Check the tag on your case to confirm which you have.

Does this kit fit a Dodge Caliber or Jeep Patriot?

The Caliber, Compass and Patriot used the JF011E, and this kit is listed for that transmission. Confirm the case tag or send us your VIN before ordering.

Does the kit include clutch frictions?

The listing photo shows gaskets, lip seals and bagged O-ring and sealing ring sets only. Frictions, steels, filters and hard parts are not shown, so plan to buy those separately if needed.

Will new seals stop a whine?

No. A whine that rises with road speed is usually pulley bearing wear, which needs new bearings. Seals cure leaks, delayed engagement and pressure loss.

What fluid goes in after the overhaul?

Use the CVT fluid the vehicle maker specifies, such as Nissan NS-2 in Nissan models. Never use conventional automatic transmission fluid in a JF011E.

• CVT Slipping Under Load: Root Causes and Fixes
• JATCO CVT Nissan Problems and Fixes: The Complete Shop Guide
• CVT Harsh or Delayed Shifts: A Diagnostic Walkthrough
• CVT Transmission Failure Patterns Across Brands