Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2008ODYSSEY EXREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSIONTRANSMISSION REASSEMBLYEXPLODED VIEW
2008 Honda Odyssey EX
Exploded View
2008 Honda Odyssey EXSECTION Exploded View
Special Tools Required
Mainshaft Holder 07GAB-PF50101
NOTE:
Refer to the EXPLODED VIEW as needed during the following procedure.
- Make sure that the ATF magnet is clean and installed in the torque converter housing. Clean and install the ATF magnet, if necessary.
- Install the main separator plate and the two dowel pins on the torque converter housing. Then install the ATF pump drive gear (A), the driven gear (B), and the ATF pump driven gear shaft (C). Install the ATF pump driven gear with its grooved and chamfered side facing down.
- Install the torque converter check valve spring and the valve in the torque converter housing.
- Install the main valve body (seven 6 mm bolts and three 8 mm bolts). Make sure the ATF pump drive gear (A) rotates smoothly in the normal operating direction, and the ATF pump driven gear shaft (B) moves smoothly in the axial and normal operating direction.
- If the ATF pump drive gear and the ATF pump driven gear shaft do not move smoothly, loosen the main valve body bolts. Realign the ATF pump driven gear shaft, and retighten the bolts to the specified torques, then recheck. Failure to align the ATF pump driven gear shaft correctly will result in a seized ATF pump drive gear or the ATF pump driven gear shaft.
- Install the lubrication check valve, the cooler check valve, and the cooler check valve spring in the main valve body. Install the lubrication check valve in the direction shown in the exploded view.
- Install the secondary separator plate and the two dowel pins on the main valve body, and install the secondary valve body (one bolt).
- Install the three check balls in the secondary valve body.
- Install the accumulator separator plate and the two dowel pins on the secondary valve body.
- Position the detent arm on the accumulator separator plate, and install the detent arm shaft into the detent arm through the separator plates to the main valve body.
- Install the 8 x 62 mm ATF feed pipe in the main valve body, and install the accumulator body (11 bolts).
- Install the regulator separator plate and the two dowel pins on the main valve body.
- Install the stator shaft with a new O-ring, and install the regulator valve body (six bolts).
- Install the stator shaft stop in the main valve body.
- Install the ATF strainer with a new O-ring (one bolt).
- Install the ATF passage pipe (one bolt) in the torque converter housing.
- Install the intermediary shaft (A) into the main valve body, and install the 26.5 mm washer (B) on the top of the intermediary shaft.
- Install the baffle plate (C) and the oil catch plate (D).
- Install the differential assembly (E) in the torque converter housing.
- Install the oil catch plates (F) (G), and make sure the differential is clear of the oil catch plate.
- Install the selector control shaft and the park lever link (H).
- Assemble the mainshaft, the countershaft, and the secondary shaft.
- Install the thrust needle bearing (A) on the secondary shaft bearing in the torque converter housing.
- Turn the shift fork shaft (B) so the large chamfered hole is facing the fork bolt hole of the shift fork.
- Engage the shift fork (C) with the reverse selector on the countershaft, and join the mainshaft (D), the countershaft (E), and the secondary shaft (F), then install them in the torque converter housing and the shift fork on the shift fork shaft.
- Secure the shift fork (A) to the shift fork shaft with the lock bolt and a new lock washer (B), then bend the lock tab of the lock washer against the bolt head.
- Install the park pawl shaft (A), the pawl spring (B), the park pawl (C), and the park pawl stop (D).
- Align the control lever pin (A) with the manual valve guide (B).
- Hook the detent arm spring (A) to the detent arm (B).
- Install the 8 x 85 mm ATF feed pipe (A), the 8 x 151.5 mm pipes (B), and the 8 x 40 mm pipe (C) in the accumulator body.
- Install the 8 x 57.5 mm ATF feed pipe (A) and the 10x123 mm pipe (B) in the torque converter housing.
- Install the two dowel pins (A) and a new gasket (B) on the torque converter housing (C).
- Place the transmission housing (D) on the torque converter housing.
- Wrap a screwdriver tip with tape to prevent damaging the reverse idler gear teeth. Engage the reverse idler gear with the reverse gears by rotating the idler gear using a screwdriver.
- While expanding the snap ring of the countershaft bearing using snap ring pliers, install the transmission housing onto the bearing part-way. Then release the snap ring pliers, and push down on the transmission housing until it bottoms out and the snap ring snaps into place in the transmission housing snap ring groove.
- Install the transmission housing mounting bolts (23 bolts) along with the transmission hanger (A), and tighten the bolts in at least two steps in a crisscross pattern to 44 N.m (4.5 kgf.m, 33 lbf.ft).NOTE: '08-10 models with the J35A7 engine: Be sure to install the transmission ground terminal bracket (B) along with the mounting bolt as shown.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.