Four noises haunt the front end of a Lexus GX more than any others. A rumble that comes and goes with drive mode. A hum that rises with speed. A clicking axle on turns. A clunk when you stop and start.
This guide covers the GX470 (2003-2009) and the GX460 (2010-2023). For the newer generation, see the GX550 buying guide.
Use the flowchart to sort your noise into one of the four, then read that section.
The needle bearing rumble (the 2WD/4HI test)
The 8-inch clamshell front differential used across the Toyota truck platform supports the driver-side CV axle with a needle bearing. When that bearing wears, the shaft develops play and the truck rumbles, growls, or buzzes, usually in the 30 to 55 mph band. Many owners feel it in the gas pedal or the floor. It often shows up after a lift, a leveling kit, bigger tires, or a CV axle replacement, because the added CV angle increases side load on the bearing.
The classic test, published by East Coast Gear Supply, works on part-time 4WD trucks (Tacoma, 4Runner, FJ): drive 35 to 45 mph in 2WD, then shift into 4HI where it is safe to do so. If the noise goes away in 4HI and comes back in 2WD, the driver-side needle bearing is the likely culprit.[1]
One caveat for GX owners. The GX470 and GX460 are full-time 4WD, so there is no 2WD mode to compare against. The noise still presents the same way, a speed-sensitive front rumble or growl in the 30 to 55 mph band, but the clean 2WD/4HI comparison is a part-time 4WD test. Some owners check for play in the driver-side CV shaft by hand with the front end on jack stands: a worn needle bearing shows visibly more movement than the passenger side.
The aftermarket fix is a clamshell bushing from East Coast Gear Supply (ECGS) or Nitro Gear & Axle. It is a sintered PTFE, metal-backed, bronze-inlaid bushing that replaces the factory driver-side needle bearing and supports the CV shaft under side load.[2] Both vendors list the bushing as fitting the GX470 (2003-2009) and GX460 (2010-2011 and later) front diffs. Driver side only. The passenger side uses a ball bearing, and you leave it alone.
The job is moderate difficulty. You pull the driver-side CV axle out of the diff, extract the needle bearing with a slide hammer and a removal tool, drive the bushing in, and install a new axle seal. The diff needs a drain and partial refill, so change the front differential oil while you are in there. The factory spec changed across generations:[3]
| Generation | Front differential oil | Capacity (drain and refill) |
|---|---|---|
| GX470 (2003-2009) | SAE 90 hypoid gear oil, API GL-5 (80W-90 below 0°F) | 1.48 US qts (1.40 L) |
| GX460 (2010-2023) | Toyota Genuine Differential Gear Oil LT 75W-85, API GL-5, or equivalent | 1.43 to 1.53 US qts (1.35 to 1.45 L) |
| GX550 (2024 and up) | Toyota Genuine Differential Gear Oil LT 75W-85, API GL-5, or equivalent | 1.23 US qts (1.16 L) |
Shop cost: roughly $300 to $500 at an independent shop for the bushing swap, or $450 and up at a dealer. DIY: bushing kit plus seal plus gear oil, roughly $80 to $150 in parts.
Wheel bearing hum vs tire noise (the turn test)
A bad wheel bearing hums. The pitch and volume rise with speed, and it keeps going regardless of throttle or road surface. The GX uses unitized front hub assemblies, and you replace the whole assembly as one bolt-on unit.
Three tests separate a wheel bearing from a tire.
- The turn test. Load shifts off the inside wheel in a turn and onto the outside wheel. If the hum changes when you turn one direction, the bearing on the outside of that turn is suspect. Example: the hum goes quiet turning right, so the left bearing is likely the bad one, because the right turn unloads it.
- The 12 and 6 shake. Lift the front until the tire is off the ground, grab the wheel at 12 and 6 o’clock, and push in and out. Play here means a failing wheel bearing. No play does not clear it, though. Plenty of howling bearings feel tight in the shop.
- The tire test. Rotate the tires front to back. If the noise moves with the tires, it is tire noise. Also try different pavement. Cupped or unevenly worn tires sing louder on concrete and go quiet on fresh blacktop. A bearing does not care about the surface.
The turn test and the rotation test catch most of them. Do not throw hub assemblies at a truck until the rotation test rules out tires, because cupping from a bad alignment fools people every week.
Shop cost: roughly $250 to $450 per side at an independent shop, $450 to $650 at a dealer. DIY: the hub assembly, roughly $110 to $250. Torque the front axle shaft nut to 173 ft-lb (235 N·m) and the hub-to-knuckle bolts to 59 ft-lb (80 N·m) on both the GX470 and the GX460.[4]
Torn CV boot: reboot or replace the axle
On the GX470, the classic failure is a torn inner boot on the driver-side axle, near the engine. The first sign is grease slung on the frame, the control arm, or the inside of the wheel. Left alone, grit gets in, the joint wears, and it starts clicking on turns. Once it clicks, the joint is done.
Reboot or replace comes down to one question. Is the joint still quiet?
- Caught early, no clicking: reboot it. A boot kit (see the table below for your generation)[5] plus fresh grease and an afternoon of your time.
- Clicking or grinding on turns: replace the axle. Rebooting a worn joint wastes the afternoon.
Boot kit part numbers from the Toyota and Lexus parts catalogs. One kit covers one axle, with the inner and outer boots, grease, and clamps:
| Generation | Boot kit, inner and outer | Inboard boot kit only |
|---|---|---|
| GX470, built Nov 2002 to Aug 2004 | 04438-60030 | 04438-60040 |
| GX470, built Aug 2004 to Aug 2009 | 04427-60080 (current number 04427-60142) | 04437-60040 |
| GX460 (2010-2023) | 04427-60133 (supersedes 04427-60130 and 04427-60131) | 04437-60090 |
| GX550 (2024 and up) | No full boot kit listed yet | 04437-60140, right side (discontinued) |
The GX550 catalog lists joint sets and complete shaft assemblies in place of a full boot kit, so a torn GX550 boot today usually means a joint set or a complete shaft.
The GX shares its CV axles with the 4Runner, Tacoma, and FJ on the same platform years, which makes replacement axles easy to find.[6] The express method, documented by owners for the Tacoma and confirmed on the GX, skips the upper ball joint and the tie rod. Remove the wheel, the axle nut (with its cotter pin and adjusting cap), and the sway bar end link from the spindle. Undo the two 19 mm bolts holding the lower ball joint attachment to the steering knuckle. Swing the whole spindle assembly outward, push the axle out of the hub, and pry the inner end out of the differential. Reverse to reassemble. Owners report about 25 to 30 minutes per side with the method.
Torque values from the GX470 manual for reassembly:
| Fastener | GX470 | GX460 (2016-2021 manual) | GX550 |
|---|---|---|---|
| Front axle shaft nut | 173 ft-lb (235 N·m) | 173 ft-lb (235 N·m) | Verify by VIN |
| Lower ball joint attachment, 2 bolts | 166 ft-lb (225 N·m) | Verify by VIN | Verify by VIN |
| Lower ball joint attachment, nut | 103 ft-lb (140 N·m) | Verify by VIN | Verify by VIN |
| Front axle hub to knuckle, 4 bolts | 59 ft-lb (80 N·m) | 59 ft-lb (80 N·m) | Verify by VIN |
| Wheel lug nuts | 83 ft-lb (112 N·m) | 76 ft-lb (103 N·m) | Verify by VIN |
Shop cost: reboot, roughly $250 to $400 at an independent shop, $500 and up at a dealer. Axle replacement: roughly $350 to $600 independent, $700 to $1,000 dealer. DIY: boot kit $40 to $60, or a new axle $245 to $320 (owner-reported dealer price for the shared-platform axle, verify by VIN).
The slip-yoke clunk when stopping and starting
A single clunk or thunk as you come to a stop, or as you pull away, is the most common GX driveline complaint of all. The cause is the slip yoke in the driveshaft. The splined section telescopes as the suspension moves. When the splines dry out, they bind, then release with a clunk.
The stock answer is maintenance. Grease the slip yoke at every oil change. Each propeller shaft on the GX470 has three zerks: one on each U-joint spider and one on the slide yoke. Wipe each fitting first, pump in grease until fresh grease barely shows at the seal, and stop. The factory manual specifies lithium base chassis grease, NLGI No. 2.[7] Hit the front and rear shafts. If you ever remove a shaft, matchmark the flanges first and reinstall on the same marks, and torque the flange nuts to 65 ft-lb (88 N·m).[8]
Some owners find greasing only quiets the clunk for a few weeks, then it comes back. Lexus addressed the GX470 clunk in TSB L-SB-0116-08 (September 2008), which covers 2003-2008 GX470s and fits a revised rear propeller shaft, part number 37110-60A40.[10] For the GX460, an owner on ClubLexus reports a TSB addressing the clunk with a revised driveshaft part number 3711060A41.[9] Some GX470 owners also report that fitting a GX460 driveshaft cured a clunk that greasing never held for long. If the clunk survives regular greasing, the revised shaft is the permanent fix, so confirm the current part number for your VIN at a dealer parts counter before you buy.
Towing and heavy hauling increase driveline loading and suspension travel, which can make a marginal slip yoke clunk worse. If you tow regularly, the GX towing guide is worth a read alongside this one.
Parts and tools
What to keep on hand for these four jobs, oldest model first (GX470, GX460, GX550).
- Grease gun with a needle or short adapter for the driveshaft zerks: the Slippery Pete mini grease gun is the right size for this work. Feed it NLGI No. 2 lithium chassis grease.
- CV boot kits (your generation’s number is in the table in the CV boot section): GX470 kit 04427-60142 (genuine Toyota boot kit on eBay); GX460 kit 04427-60133 (genuine Toyota boot kit on eBay). Or a replacement axle (shared-platform axle 43430-60083 reported for GX460/4Runner 2010 and later, verify by VIN).
- Boot band clamp tool for ear-type bands: Knipex ear clamp pliers. Shadetree: nothing else crimps these bands correctly, so borrow one if you can.
- Clamshell bushing kit (ECGS T8CS-BUSHING) plus a needle bearing removal tool and slide hammer if you are doing the needle bearing job.
- New driver-side axle seal, since you will disturb it pulling the axle.
- Unitized front hub assembly (front left and right are the same application across the GX470, GX460, 4Runner, Tacoma, and FJ shared years): Koyo front hub bearing assemblies, sold as a pair.
- 19 mm sockets for the lower ball joint attachment bolts, a pry bar for popping the axle out of the diff, and a 1/2-inch torque wrench for every fastener in the table above.
- Gear oil for a front diff drain and refill: the oil spec and capacity differ by generation, so use the table in the needle bearing section.
Repair cost estimates
Low end is independent shop prices, high end is dealer prices, DIY is parts cost only.
| Job | Independent shop | Dealer | DIY parts |
|---|---|---|---|
| Needle bearing bushing swap | $300 to $500 | $450 and up | $80 to $150 |
| Front hub assembly, one side | $250 to $450 | $450 to $650 | $110 to $250 |
| CV boot reboot | $250 to $400 | $500 and up | $40 to $60 |
| CV axle replacement | $350 to $600 | $700 to $1,000 | $245 to $320 |
| Slip yoke grease service | $0 to $50 with an oil change | $75 to $150 | Under $20 |
Frequently asked questions
How do I know if my GX noise is the needle bearing? On part-time 4WD trucks (Tacoma, 4Runner, FJ), the test is the 2WD/4HI comparison: drive 35 to 45 mph in 2WD, shift to 4HI where safe, and a noise that disappears in 4HI points at the driver-side needle bearing. The GX470 and GX460 are full-time 4WD, so there is no 2WD baseline. Listen for the same speed-sensitive rumble or growl in the 30 to 55 mph band, and check the driver-side CV shaft for excess play by hand with the truck on jack stands.
Does the ECGS bushing fit the GX470 and GX460? Aftermarket vendors list the 8-inch clamshell bushing for the GX470 (2003-2009) and the GX460 (2010-2011 and later). The bushing replaces the driver-side needle bearing only. One IH8MUD thread disputes whether full-time-4WD GX diffs carry this needle bearing, so verify against your VIN and your diff before ordering.
Wheel bearing or tires? Run the turn test and the tire rotation test. If the hum changes in turns, suspect a wheel bearing. If the noise moves when you rotate tires front to back, or changes with pavement type, it is the tires.
Should I reboot a torn CV boot or replace the axle? Reboot if the joint is still quiet. Replace the axle if it clicks or grinds on turns.
How often should I grease the slip yoke? At every oil change. Use lithium base chassis grease, NLGI No. 2, and hit the slip yoke zerk plus both U-joint zerks on each shaft.
My clunk came back a month after greasing. Now what? The splines may be worn beyond what grease can mask, or your truck may be a candidate for the revised driveshaft. Lexus TSB L-SB-0116-08 covers the 2003-2008 GX470 with revised shaft 37110-60A40. For the GX460, an owner-reported TSB names 37110-60A41 (verify by VIN). Some GX470 owners report a GX460 driveshaft fixed theirs.
Sources
- East Coast Gear Supply, Toyota clamshell bushing product and video FAQ. https://www.youtube.com/watch?v=l9XED_tXl_A
- East Coast Gear Supply, Toyota clamshell bushing install video. https://www.youtube.com/watch?v=xSVPePjGge4
- Trail-Gear, Nitro Gear & Axle Toyota 8-inch clamshell stub axle bushing. https://trail-gear.com/brands/nitro-gear-and-axle/toyota-8-clamshell-t8s-stub-axle-bushing-by-nitro-gear-akt8s.html
- Yotamasters, genuine Toyota 7.5-inch and 8-inch clamshell side seals and bushing fitment. https://www.yotamasters.com/products/genuine-toyota-7-5-8-clamshell-side-seals
- Overland Garage, Nitro Gear Toyota 8-inch stub axle bushing. https://overlandgarage.ca/collections/vehicle-upgrades/products/nitro-gear-axle-toyota-8in-stub-axle-bushing-by-nitro-gear-akt8s.html
- Tacomaworld, “Needle bearing bad?” thread. https://www.tacomaworld.com/threads/needle-bearing-bad.864950/
- Tacomaworld, “Front Diff Noise & Vibrations – Needle Bearing – Fixed” thread. https://www.tacomaworld.com/threads/front-diff-noise-vibrations-needle-bearing-fixed.674747/
- Tacomaworld, “Is its not a bad wheel bearing with else could it be?” thread (turn test). https://www.tacomaworld.com/threads/is-its-not-a-bad-wheel-bearing-with-else-could-it-be.532219/
- Tacomaworld, “Replace front diff bearing – not the needle bearing, the passenger side?” thread. https://www.tacomaworld.com/threads/replace-front-diff-bearing-not-the-needle-bearing-the-passenger-side.622233/
- Tacomaworld, “CV Axle Replacement … express method!!” thread. https://www.tacomaworld.com/threads/cv-axle-replacement-express-method.266309/
- Tacomaworld, “How-to: Rebooting a Tacoma CV Axle” thread. https://www.tacomaworld.com/threads/how-to-rebooting-a-tacoma-cv-axle.604695/
- Tacomaworld, “2nd Cv Axle Boot Rip, Why?” thread. https://www.tacomaworld.com/threads/2nd-cv-axle-boot-rip-why.840434/
- IH8MUD, “Front diff needle bearing / bushing” thread. https://forum.ih8mud.com/threads/front-diff-needle-bearing-bushing.1230003/
- IH8MUD, “GX, 07: torn cv boot – driver side, near engine” thread. https://forum.ih8mud.com/threads/gx-07-torn-cv-boot-driver-side-near-engine.822351/
- IH8MUD, “My most advanced DIY Ever: Lubbed my Drive Shafts” thread. https://forum.ih8mud.com/threads/my-most-advanced-diy-ever-lubbed-my-drive-shafts.321626/
- IH8MUD, “Slop or a clunk when accelerating” thread. https://forum.ih8mud.com/threads/slop-or-a-clunk-when-accelerating.289134/
- IH8MUD, “2004 GX470, clanking noise from rear when accelerating hard” thread. https://forum.ih8mud.com/threads/2004-gx470-clanking-noise-from-rear-when-accelerating-hard.1220277/
- IH8MUD, “2008 GX470 Front Wheel Bearing replacement” thread. https://forum.ih8mud.com/threads/2008-gx470-front-wheel-bearing-replacement.893632/page-2
- ClubLexus GX 2nd gen, “2019 GX violent shock in 1st gear” thread (revised driveshaft 3711060A41). https://www.clublexus.com/forums/gx-2nd-gen-2010-2023/1054859-2019-gx-violent-shock-in-1st-gear.html
- Lexus Owners Club, “New Tsb For Clunk On Gx2004 Model” thread (TSB L-SB-0116-08, revised shaft 37110-60A40). https://us.lexusownersclub.com/forums/topic/52767-new-tsb-for-clunk-on-gx2004-model/?do=findComment&comment=340958
- Lexus Owners Club, “GX470 Bang/Jerk at idle. Can this be the infamous driveshaft issue?” thread. https://us.lexusownersclub.com/forums/topic/101364-gx470-bangjerk-at-idle-can-this-be-the-infamous-driveshaft-issue/
- Tuner with Kids, “How to Replace Lexus GX470 CV Axles | 4Runner FJ Cruiser Tacoma” video. https://www.youtube.com/watch?v=X9rNTCTb_Wk
- Tuner with Kids, “How to Grease Driveshaft on Lexus GX470 & Toyota Trucks” video. https://www.youtube.com/watch?v=XaHwXrloCmA
Related guides: GX tire fitment for tire-noise questions, lift kits since lifts accelerate the needle bearing issue, and GX460 brakes for the spindle-area work these jobs share. Also upcoming: the differential drop kit guide and the highway vibration diagnosis guide.
Footnotes
[1] ECGS clamshell bushing video FAQ: drive 35 to 45 mph in 2WD, shift to 4HI where safe; noise gone in 4HI means the driver-side needle bearing is very likely the issue. https://www.youtube.com/watch?v=l9XED_tXl_A
[2] ECGS and Nitro Gear product listings: sintered PTFE bushing, metal backed, bronze inlaid, PTFE coated; replaces needle bearing part numbers 90364-35010 and 90364-35008; driver side only, the passenger side uses a ball bearing. https://trail-gear.com/brands/nitro-gear-and-axle/toyota-8-clamshell-t8s-stub-axle-bushing-by-nitro-gear-akt8s.html
[3] GX470 factory service manual, maintenance: front differential oil 1.48 +/- 0.05 US qts, SAE 90 above 0F (80W or 80W-90 below), hypoid gear oil API GL-5. GX460 factory service manual, lubricant data: front differential 1.35 to 1.45 liters (1.43 to 1.53 US qts), Toyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent. 2024 GX550 owner’s manual, specifications: front differential 1.23 qt (1.16 L), Toyota Genuine Differential Gear Oil LT 75W-85 GL-5 or equivalent.
[4] GX470 manual: front axle hub nut 235 N·m (173 ft-lb); GX460 2016-2021 manual: front axle shaft nut 235 N·m (173 ft-lb). Both manuals: front axle hub to steering knuckle, 4 bolts at 80 N·m (59 ft-lb).
[5] Boot kit part numbers from the Toyota and Lexus parts catalog listings (Lexus Parts Now fitment tables and the Megazip catalog diagrams), checked Oct 19, 2026. Axle 43430-60083 reported by a GX owner video. Verify by VIN. https://www.youtube.com/watch?v=X9rNTCTb_Wk
[6] Shared-platform axle claim from a Tacomaworld owner post. Verify by VIN.
[7] 2005 GX470 factory manual, maintenance: propeller shaft lubrication, grease grade lithium base chassis grease (NLGI No. 2), lubricating positions spider and slide yoke.
[8] GX470 manual: propeller shaft flange bolts and nuts, 88 N·m (65 ft-lb); matchmark flanges before removal and align matchmarks on installation.
[9] ClubLexus GX 2nd gen thread: owner post reporting a TSB with revised driveshaft part number 3711060A41 for a 2019 GX460. Verify by VIN. https://www.clublexus.com/forums/gx-2nd-gen-2010-2023/1054859-2019-gx-violent-shock-in-1st-gear.html
[10] Lexus TSB L-SB-0116-08, September 17, 2008: 2003-2008 GX470 rear propeller shaft clunk; revised shaft 37110-60A40 replaces 37110-6A480; supersedes DL002-07 and DL001-06.
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