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Symptoms:
  • 2-3 Bind-up
  • 4-3 Bind-up
  • B1 brake clutches burned
  • B1 Clutch burned
  • Harsh 1 through 4 maneuver shifts
Cause:

Wear of the B1 control valve in the aluminum sleeve.

Correction:

The new assembly restores B1 control for up/down shifts.

U151E, U151F, U250E

B1 Apply Control Plunger Kit

Part No.

27741-04K

B1 Apply Control Plunger Kit
  • 27741-04k_combo

  • B1 Apply Control Plunger Kit

Small_27741-04k_combo Small_27741-04k

U151E, U151F, U250E

B1 Apply Control Plunger Kit

Part No. 27741-04K

  • Plunger Valve
  • Sleeve

Complaint:

  • 2-3 Bind-up
  • 4-3 Bind-up
  • B1 brake clutches burned
  • B1 Clutch burned
  • Harsh 1 through 4 maneuver shifts

Cause:

Wear of the B1 control valve in the aluminum sleeve.


Correction:

The new assembly restores B1 control for up/down shifts.

The B1 brake in U151E/F and U250E transmissions is applied in 2nd, 4th and 5th gear. The B1 apply control plunger valve helps to correctly position the apply control valve to allow apply oil through the control valve and to feed the B1 brake. If there is excessive wear at the plunger valve sleeve, B1 brake oil is reduced.

  • Drop in replacement, no special tools required.
  • Plunger sleeve made of wear-resistant aluminum.
  • Hard-coat anodized aluminum plunger valve with annular grooves resists wear.

Related Parts

You need this if...

Either a Wet Air Test or a Vacuum Test in the location shown, result in leakage. Vacuum test must hold a minimum of 18.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Toyota U151E/F, U250E

Related Tech Articles

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