The B1 brake in Toyota/Lexus U151E, U151F and U250E transmissions is applied in 2nd, 4th and 5th Gear. If there is excessive wear at the plunger valve sleeve, B1 brake oil is reduced. Sonnax B1 apply control plunger kit 27741-04K features annular grooves on hardcoat annodized aluminum valve to correctly position the apply control valve to allow apply oil through the control valve and to feed the B1 brake.

Plunger sleeve made of wear-resistant aluminum
Hardcoat anodized aluminum plunger valve, with annular grooves, combats premature wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

MANLEY Connecting Rod Pin Bushing, Bronze, .952 in. OD, .867 in. ID, .935 in. Length, Set of 8

MANLEY Connecting Rod Pin Bushing, Bronze, .952 in. OD, .867 in. ID, .935 in. Length, Set of 8

$182.30

Motive Gear Differential Pinion Bearing Kit, Koyo, For CHEVROLET CAMARO 2010–2015, Kit

Motive Gear Differential Pinion Bearing Kit, Koyo, For CHEVROLET CAMARO 2010–2015, Kit

$205.61

TCI 95-'97 4L60E Front Pump Assembly w/ Billet Rotor Kit

TCI 95-'97 4L60E Front Pump Assembly w/ Billet Rotor Kit

$1,170.26