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LS400 Transmission Mount Replacement
1. Jack up the front of the car and support it with axle stands.
Position the jack under the transmission, place a piece of wood on top to
spread the load and gently lift the transmission slightly above its resting
position.
2. Remove these four nuts with a 12mm socket.
3. Remove the cross member by removing these four bolts with a 14mm
socket. They're not all the same length so make a note of where they go.
4. Undo these four bolts with a 12mm socket to remove the old mount from
the transmission.
5. Installation is the reverse of removal.
This is the new mount, part number 12371-50010.
The old mount. Looks a bit squashed compared to the new one!