2004 LC with 190K miles. Recently the "dying seagull" screeching sound is coming back. Based on the discussion on this forum, replacing the whole assembly is the only solution. If I read correctly, the screeching sound is caused by a deteriorated O-ring inside the master cylinder body. When it is under high pressure, it can not properly seal tube and let the fluid pass. That is the cause of the screeching sound. There is no known way to just replace the O-ring inside the master cylinder body.
I would like to keep the truck as long as possible. Thus I decide to bite the bullet and purchases a new assembly. After brake is very important for safety. Luckily the price for the whole assembly is much lower than before now. Used to be $2500 and up. Now it is around $1500. You can buy it online at little bit cheaper price. But I decide to go with my local dealer ship just in case. They are able to work out a price that is closer to the online price. Never hurt to haggle the price.
For 2004 LC part number: 47050-60043
I try to follow the step shown on this video (). It is great video. But I found that it is not necessary to take part the whole bottom panel. Just take out the ABS control module will give enough space to work on the 4 nuts. top left, bottom left and top right nuts are easy after ABS module is removed. Bottom right nuts is a little bit challenging. Needs a swivel adapter and extension, but still not too hard.
Over all it is pretty easy job.
Happy wrenching
Heavily corroded.
Old and new
I would like to keep the truck as long as possible. Thus I decide to bite the bullet and purchases a new assembly. After brake is very important for safety. Luckily the price for the whole assembly is much lower than before now. Used to be $2500 and up. Now it is around $1500. You can buy it online at little bit cheaper price. But I decide to go with my local dealer ship just in case. They are able to work out a price that is closer to the online price. Never hurt to haggle the price.
For 2004 LC part number: 47050-60043
I try to follow the step shown on this video (). It is great video. But I found that it is not necessary to take part the whole bottom panel. Just take out the ABS control module will give enough space to work on the 4 nuts. top left, bottom left and top right nuts are easy after ABS module is removed. Bottom right nuts is a little bit challenging. Needs a swivel adapter and extension, but still not too hard.
Over all it is pretty easy job.
Happy wrenching
Heavily corroded.
Old and new