Product Details

Heavy duty pressure regulator spring and valve kit for the 1996-up AODE, 4R70W, 4R70E, 4R75E and 4R75W 4 speed automatic transmission.

This HD valve and spring kit contains the following items:

• Elevated pressure regulator spring
• Hardcoat anodized aluminum pressure regulator valve

Item specifics:

• Brand: Sonnax
• Part number: 76948-12K
• Year range: 1996-up
• Covered Models: Ford, Lincoln, Mercury
• Transmission Models: AODE, 4R70W, 4R70E, 4R75E, 4R75W

Low line pressure on heavy-duty applications of Ford AODE and 4R70W transmissions results in forward clutch failure due to slippage. In 1996, Ford made a change to both the pressure regulator valve and valve body casting. The valve spool locations were changed slightly, and the spool diameter controlling line to converter feed was stepped. This spool step, in conjunction with regulating notches added to the valve body casting, allows converter feed to be regulated. Due to these OEM modifications, installation of a stronger spring without a specially modified regulator valve will result in restriction of converter charge and converter release circuits. This may cause the engine to stall or surge at an idle or create converter shudder. The Sonnax kit 76948-12K contains a properly metered pressure regulator valve and the stronger spring, to work on the '96 and later valve bodies. Typical applications for this elevated PR valve spring fix are squad cars and vehicles requiring frequent and hard acceleration.

This transmission can be identified by the 14-bolt oil pan and 4 forward gears. For the F-150 and F-250 the door jamb sticker will show a TR code of 'U'.

These transmissions can be found in the following vehicles; however, you should double check your application with the bolt count.  It is common for similar vehicles to have multiple transmission options available from the factory.

Ford:

• Crown Victoria 1996-2012
• E150 1996-2012 (14 bolt pan)
• E250 1996-2012 (14 bolt pan)
• E350 1996-2012 (14 bolt pan)
• Expedition 4.6L 1997-2002 (2003-2006 all)
• Explorer 5.0L 1996-2001
• F150 1996-2010 (14 bolt pan)
• F250 1996-2010 (14 bolt pan)
• Mustang 1996-2004
• Thunderbird 1996-1997

Lincoln

• Mark LT Truck 2006-2009
• Mark VIII 1996-1998
• Town Car 1996-2011

Mercury

• Cougar 1996-1998
• Grand Marquis 1996-2010
• Mountaineer 5.0L 1997-2001

This automatic transmission HP pressure regulator spring and valve kit fits the following years: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, and 2012.