Fits '94-'08 except applications with the shorter spring
Symptoms:
1-2 Soft
3-4 Soft
2-3 Flare
Cause:
The servo timing and apply rate of the direct clutch become poor due to low pressure, servo leakage and/or pin bore wear.
Correction:
Installation of Sonnax servo return spring will slow the release of the band on a 2-3, yet allow quicker servo travel on reapplication. This results in shorter shifts throughout.
In Ford CD4E and Mazda LA4A-EL units, low pressure, servo leakage and/or pin bore wear can all cause a degradation of the servo timing and apply rate of the direct clutch in CD4E transmissions. The Sonnax reduced force servo return spring to addresses these problems.
Replacement spring provides enough force to firmly apply the 2-4 band, yet is not overly stiff so that a controlled release is allowed
Spring will work with both the one-piece or two-piece servo piston and rod assembly
Note:
This spring will shorten shift duration, but is not a fix for leakage, a weak pump or poor line rise. Always verify the hydraulics by testing line pressure first.
Fits '94-'08 except applications with the shorter spring
Symptoms:
Cause: The servo timing and apply rate of the direct clutch become poor due to low pressure, servo leakage and/or pin bore wear.
Correction: Installation of Sonnax servo return spring will slow the release of the band on a 2-3, yet allow quicker servo travel on reapplication. This results in shorter shifts throughout.
In Ford CD4E and Mazda LA4A-EL units, low pressure, servo leakage and/or pin bore wear can all cause a degradation of the servo timing and apply rate of the direct clutch in CD4E transmissions. The Sonnax reduced force servo return spring to addresses these problems.
Note: This spring will shorten shift duration, but is not a fix for leakage, a weak pump or poor line rise. Always verify the hydraulics by testing line pressure first.
SONNAX Installation Instructions