4L60 700R4 Transmission Throttle Valve Plunger Valve Kit Sonnax 77966-94MK
Prevents forced 4-3 kickdown below three-quarter throttle
Poor line rise or no detent downshifts can be common complaints in vehicles with a THM 700-R4 transmission. The steel throttle valve plunger continuously reciprocates within the aluminum throttle valve plunger sleeve, wearing the sleeve. This wear allows throttle valve feed oil to leak past the plunger and exhaust, resulting in poor line rise and problematic downshifts. In addition, the OE spring is weak and can result in low line rise, insufficient throttle pressure and, ultimately, 3-4 clutch failure. Sonnax throttle valve plunger valve kit 77966-94MK includes an improved throttle valve spring designed to maintain higher line pressure and improved TV performance.
Sleeve is made from high-quality aluminum to prevent wear.
Sleeve and plunger have been tightly toleranced to restore hydraulic integrity.