Symptoms:

  • Delayed Reverse
  • B2 Clutches burned
  • No engine braking in manual low
  • Erratic shift timing

Cause:

Wear of the B2 control valve in the aluminum sleeve.

Correction:

Sonnax drop-in B2 apply control plunger kit eliminates the loss of B2 pressure.

U151E, U151F, U250E

B2 Apply Control Plunger Kit
Part No. 27741-06K

You need this if... View Instructions Find a Distributor

The B2 brake in Toyota/Lexus U151E, U151F and U250E transmissions is applied in Reverse and manual Low. During manual Low, the B2 apply control plunger valve helps to correctly position the apply control valve to route Low/1st oil pressure through the control valve to apply the brake. If there is excessive wear at the plunger valve sleeve, B2 brake oil is reduced. Sonnax B2 apply control plunger kit 27741-06K eliminates the loss of B2 pressure.

  • Drop in replacement, no special tools required
  • Plunger sleeve made of wear-resistant aluminum
  • Hardcoat anodized aluminum valve and annular grooves combat premature wear
  • Drop-in Zip Valve™ parts install quickly and easily
  • Sleeve
  • Plunger Valve

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Toyota/Lexus U151E/F, U250E Valve Body Layout

Toyota/Lexus U151E/F, U250E Valve Body Layout
  • U151E, U151F, U250E B2 Apply Control Plunger Kit 27741-06K
  • U151E, U151F, U250E B2 Apply Control Plunger Kit 27741-06K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

U151E, U151F, U250E B2 Apply Control Plunger Kit Vacuum Test Locations