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GRAND CHEROKEE 1991-1993 4 SP R/4WD L6 4
VAN/WAGON 1987-1990 4 SP RWD L4 2
VENZA 2008-2016 6 SP FWD L4 2
BAJA 2003-2006 4 SP 4WD H4 2
Transmissions: AX4N (4F50N) 1991-UP
boost valve kit sonnax 4l80e 4l85e mt1 mn8 Transmission_AF23-5 GRAND CHEROKEE 1991-1993 4 SPBoost Valve Kit 4L80 E, 4L85 E From Sonnax Compatible with '91 later units featuring a factory style sleeve (no O rings). Can also be retrofitted to '89 91 units. GM 4L80 E and 4L85 E transmissions in various vehicles are often plagued by issues such as uncontrollable line rise (surpassing 500 600 psi), excessive line pressure in Reverse, buzzing noises, fractured direct clutch drums, and or damaged cases. A common root cause of these issues is the
