strange noise
- Thread starter clint99
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CdaleR4000si
New member
Check your driveshaft as well. I had a similar sounding noise last year, took me forever to figure out. Lubed the driveshaft, no more noise.
4Runners.org - Lubing Your Driveshaft
Hopefully it's something simple like this.
4Runners.org - Lubing Your Driveshaft
Hopefully it's something simple like this.
SkidPalace
Member
Sounds like a pinion bearing.
From: Diagnosing Differential Problems | West Coast Differentials
Driveline, Axle, Ring and Pinion Gear and Differential Noise
Noises, vibrations and other irregular driving characteristics can often help diagnose a differential or driveline problem. Here are a few typical symptoms and their possible cause:
Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears.
A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up.
Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.
Regular clunking every few feet may indicate broken ring or pinion gears.
Banging or clunking only on corners can be caused by broken spider gears, lack of sufficient positraction lubrication, or worn positraction clutches.
Rumble while turning may indicate bad wheel bearings.
A steady vibration that increases with the vehicle’s speed can be caused by worn u-joints or an out of balance driveshaft.
Clunking only when starting to move or getting on and off the gas might be loose yokes, bad u-joints or worn transfer case or transmission parts
From: Diagnosing Differential Problems | West Coast Differentials
Driveline, Axle, Ring and Pinion Gear and Differential Noise
Noises, vibrations and other irregular driving characteristics can often help diagnose a differential or driveline problem. Here are a few typical symptoms and their possible cause:
Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears.
A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up.
Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.
Regular clunking every few feet may indicate broken ring or pinion gears.
Banging or clunking only on corners can be caused by broken spider gears, lack of sufficient positraction lubrication, or worn positraction clutches.
Rumble while turning may indicate bad wheel bearings.
A steady vibration that increases with the vehicle’s speed can be caused by worn u-joints or an out of balance driveshaft.
Clunking only when starting to move or getting on and off the gas might be loose yokes, bad u-joints or worn transfer case or transmission parts
