Issue Summary:
- The Toyota U240-E has numerous sleeves that are prone to wear, which can result in premature transmission failure.
- Toyota vehicles equipped with U150-series five-speed transaxles may exhibit slipping upshifts and/or premature transmission failure.
The Toyota U240-E has numerous sleeves that are prone to wear. The following information shows how this wear can create premature transmission failure if the sleeves are not replaced. There is also information showing locations of valves, springs, checkballs and retainers.
Refer to Figure 1 for a cross-sectional view of the primary regulator valve and a brief description of its operation and potential failures.
Figure 2 shows a cross-sectional view of the clutch-apply control valve and a brief description of its operation and the potential failures that may be caused by a worn sleeve.
Refer to figures 3 and 4 for a cross-sectional view of the lockup control valve and a partial hydraulic schematic of its operation with the TCC off and TCC on, and the potential failures that may be caused by a worn sleeve.
Figure 5 shows the location of the main regulator valve and sleeve. Refer to Figure 6 for locations of the lower-valve-body retainers and checkballs.
Figure 7 shows the location of the clutch-apply control valve and sleeve, and the lockup control valve and sleeve. Refer to Figure 8 for the locations of the upper-valve-body retainers and checkballs.
Figure 9 shows the location of the B1 and C2 accumulators. Check the pistons and bores in the upper valve body for wear, and repair as necessary.
- Main regulator boost sleeve RAV4 (Toyota part number) . . . . . . . . . . . . . . .35417-28030
- Main regulator boost sleeve Camry (Toyota part number) . . . . . . . . . . . . . . .35417-21010
- Main regulator boost valve and sleeve (Sonnax) . . . . . . . . . . . . . . . . . . . . . . . . .57917E-01K
- Clutch-apply control-valve sleeve (Toyota part number) . . . . . . . . . . . . . . .35492-21010
- TCC control-valve sleeve (Toyota part number) . . . . . . . . .35211-21010
Toyota vehicles equipped with U150-series five-speed transaxles may exhibit slipping upshifts and/or premature transmission failure.
The cause may be a faulty pressure-control solenoid, which is referred to as the SLT (Figure 10), or a worn-out solenoid-modulating-valve bore in the upper valve body (Figure 11). Reason: The SLT solenoid controls line pressure; if it is faulty, slipping shifts will occur. The solenoid modulating valve controls solenoid feed to all the solenoids except SR and S4, which are fed line pressure through a 0.046-inch orifice. Low solenoid feed will cause low feed to the linear solenoids that are controlling shift overlap, which means premature transmission failure.
To correct this condition, attach a line-pressure gauge on the line-pressure port on the front of the case where the accumulator outline is. Line pressure is about 60 psi in Drive and 150 at stall. Evaluate line rise as the vehicle is driven. An erratic or bouncy needle can indicate SLT failure; replace as necessary. If pressure is good, disassemble the upper valve body as shown in Figure 11 and check the solenoid-modulating-valve bore for wear.
Note: At this time there are no repairs for this valve. You will have to buy a new or good used valve body.
December 2009 Issue
Volume 26, No. 12
- Toyota U240-E: Valve-body repair information
- Toyota U150 Series: Slipping upshifts/premature failure