Product Details

High performance line pressure booster kit with spring from Sonnax for all years of the Ford or Lincoln E4OD and 4R100 transmissions.

Part specifics:

• Brand: Sonnax
• Part number: 4R100-LB1
• Transmission make:  Lincoln
• Transmission model: E4OD, 4R100, E40D
• Year range: 1989-2005
• Speeds: 4 speed automatic overdrive
• Identifier: 20 bolt pan – E code on door sticker
• Drivetrain type: RWD or 4x4
• Requires pump removal: Yes

The Sonnax pressure regulator springs are approximately 10% stronger than OE and more conservative in impact than other aftermarket kit springs. The large ratio boost valves provide higher pressure incrementally and when it is needed the most. The combination of these springs and valves in a Sonnax kit gives you the best of both worlds: a modest pressure increase at the low end, with a high-end pressure that is equal to or greater than that of other aftermarket kit springs. Features & Benefits: Achieve shorter shifts and increased torque capacity without creating low-speed harshness. Improved band and clutch holding capacity for increased durability. Progressive pressure increase as driving conditions become more demanding. All the benefits of increased line pressure without overloading the pump at idle. Simple and affordable drop-in solution with no special tools or reaming required.

This transmission can be identified by the 20-bolt oil pan and 4 forward gears. The door jamb sticker will show a TR code of 'E'.

This transmission boost valve and spring kit will work in the following vehicles applications, however you should double check your application with the bolt count or door sticker code.  It is common for similar vehicles to have multiple transmission options available from the factory

Ford

• Bronco, 5.0L, 5.4L, 1989-1996
• E250 Van, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)
• E350 Van, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)
• E450 Van, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)
• Excursion, 2000-2005
• Expedition, 5.4L, 1997-2002
• F150, 5.0L, 5.4L 1989-2005, (20 bolt pan)
• F250, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)
• F350, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)
• F450, 4.9L, 5.0L, 5.4L, 6.0L 6.8L, 7.3L IDI, & Powerstroke, 1989-2005, (20 bolt pan)

Lincoln

• Navigator, 1997-2004

This transmission line pressure booster kit fits the following years: 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, and 2005.