Disassembly
1. INSPECT UNDERDRIVE PLANETARY GEAR PRELOAD
HINT: (See page AX-260)
2. REMOVE FRONT PLANETARY GEAR NUT

(a) Using SST, loosen the staked part of the lock nut.
SST 09930-00010 (09931-00010, 09931-00020), 09387-00050

(b) Place the underdrive planetary gear in a soft jaw vise.
NOTICE: Be careful not to damage the differential drive pinion.

(c) Using a socket wrench, remove the lock nut.
3. REMOVE CYLINDRICAL ROLLER BEARING RACE INNER

(a) Using SST, remove the cylindrical roller bearing race inner.
SST 09950-00020, 09950-00030, 09950-60010 (09951-00320, 09957-04010)
4. REMOVE UNDERDRIVE PLANETARY GEAR ASSEMBLY

(a) Using SST and a press, remove the differential drive pinion, parking lock gear, counter driven gear with underdrive planetary ring gear and radial ball bearing front.
SST 09950-60010 (09951-00320), 09387-00050, 09950-00020, 09950-00030, 09950-40011 (09957-04010)

(b) Place the underdrive planetary gear in a soft jaw vise.
(c) Using SST, remove the radial ball bearing rear from the underdrive planetary gear
SST 09950-60010 (09951-00320), 09950-00030, 09950-40011 (09957-04010)
5. REMOVE UNDERDRIVE PLANETARY RING GEAR

(a) Using a snap ring pliers, remove the snap ring.

(b) Remove the underdrive planetary ring gear from the counter driven gear.
Test yourself
A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.