Instructions for replacing rear wheel bearing hub assembly on Lexus LS430, 2000 - 2007. Hi all. Having read so many threads of how to replace rear wheel bearings, but none with any real detail, I tackled the job myself and thought it may be helpful to give detailed instructions. (Before I forget them...) To ascertain which side is noisy, take a test drive. Pick a smooth surfaced road so you can clearly hear the bearing noise above tyre noise. When going around a right hand bend, the weight of the car shifts to the left, so the left hand bearing will load up and start its classic "wooooommm, wooooommm, wooooommm" noise, which will revert back to just an audible, low pitched consistent growl, which varies in pitch with road speed, when you're going straight. Ditto for the right hand bearing. It will make the noise when going around a left hand bend. Having determined which wheel bearing is at fault, time to replace the bearing. Buy a complete hub assembly. Don't bother trying to replace just the actual bearing out of the assembly. Not worth the hassle. I trawled the net and got a genuine Toyota one for $94.50 delivered. You will need:-
Torch or leadlight.
Mirror
10mm socket
17mm short socket
19mm socket
32mm 12 point socket (1/2" drive) and either a breaker bar or impact gun.
ratchet wrench and a couple of short extensions
pliers
Medium sized 2 or 3 claw puller (even a relatively cheap one will do the job).
A short length (6") of flat steel, say 1/2" wide, which you can bend
the last 1/2 " to make a hook at 90 degrees, and the other end to about
1" at 90 degrees the opposite way. Sort of making an elongated Z.
Procedure:-
Jack up the rear wheel with the noisy bearing, and remove road wheel.
Put axle stand under subframe mount at front of wheel arch for safety.
Remove brake caliper (2x19mm bolts) and tie up to take strain off brake hose.
Remove brake disc (not held on by anything other than roadwheel.
Remove split pin from end of axle and remove castellated locking cap.
Using 32mm socket and breaker bar (or impact gun) undo axle nut.
Remove 10mm bolt from ABS sensor and pull sensor out of the way. Look in the
hole and you'll see a hole in the sheetmetal cover over the ABS cog.
Spray WD40 into axle splines in hub. You may have to give the end of the axle a
gentle tap with a hammer and copper drift to loosen it in the splines.
Place puller claws around hub and position threaded part in centre of axle.
Tighten puller to push axle towards differential. It will move about 1" to
1.5".
Note that you DO NOT have to remove the CV joint rubber boot. (Experience..)
The hub assembly is held in place on the hub carrier by 4 x 17mm bolts. They
are partly obscured by a round pressed sheetmetal cover protecting the ABS cog wheel. Using the strip of steel which you bent earlier, manoeuvre the end which you've bent 1/2" in
behind this sheetmetal cover to hook under it, deep within the hub carrier.
You'll need the torch and the mirror to see what you're doing.
I used a drift pushing on the other 1" bent end and gently tapped at it
towards the centre of the car, in a couple of places around the cover, and it
popped out and came loose.
This enables you to manoeuvre the 17mm socket with short extension onto all 4
bolts behind the hub carrier. They were not excessively tight, so were
relatively easy to undo. Once all out, manoeuvre the drift inside the parking
brake mechanism to tap the old hub carrier (which you're replacing) to loosen
it. It will eventually move and come away from its circular recess.
Carefully pull it out, and clean the circular recess with a fine wire brush or
similar.
Replace with new bearing/hub assembly and as they say, installation is a
reversal of removal.
Partly tighten the 4x17mm bolts in diagonally opposite sequence to ensure the
hub sits straight in its housing. Then tighten securely.
Be careful to align the hole for the ABS sensor on the sheetmetal cover in the
same place you saw before when you removed the sensor.
Release the puller and let the natural tension in the axle poke it through the
new hub. This will push the sheetmetal cover into position, but give it a
GENTLE tap from behind to ensure it's seated.
Axle nut on & tighten with impact gun or bar. Castellated cover and split
pin in. ABS sensor back in and bolted. Brake disc on. Caliper on and tighten
2x19mm bolts. Axle stand out, wheel on & tight, jack
out and clean up before touching upholstery.....
Job done. Lexie's all quiet again. Old bearing showed signs of rust,
hence the noise.
Hope this is helpful. Total job time approx 2 hours. Time for a coffee (or a
beer...)
Regards,
Nodding_Dog