Help - Strange noise from Hilux (IFS)

[Difflock]

Hi fellow Hiluxers,

I'm in need of assistance. Recently my Hilux developed a strange sound. I drive a 2004 2.7i double cab 4X4. The sound occurs under the following conditions: acceleration from stationary position or from slow idle when depressing the accelerator a little harder than normal. The sound is as if the rear tyres are spinning during the pull away or a slipping type of sound however after testing it on different surfaces the sound was the same so I dont think it is the sound of spinning tyres. It is definitely coming from the rear or somewhere in middle from underneath the vehicle. I recently repaired a cracked leaf spring and since then the sound developed. I just cannot think that that might have something to do with it. I have had the car checked out but the fault could not be diagnosed. Very little to no information is available on the internet (or perhaps I'm searching for the wrong thing). Does anyone have any ideas?

[Mud Dog]

....... acceleration from stationary position or from slow idle when depressing the accelerator a little harder than normal

Hi Ruan, are we to understand that this happens when the vehicle is stationary (in neutral) as well? Sometimes the origin of a sound can be deceptive, one might for example think it's coming from the rear but it may be more central.

If I understand your description, this happens also when stationary, and that would eliminate the drive train - it would only include the gearbox input (spigot) shaft if in neutral. Could also be emanating from the clutch, release bearing, spigot bearing or the motor itself.

If on the other hand it only happens when running in gear under acceleration, it could be a host of things causing it, but since you say it started after suspension work, that would be the first area to examine, although that may be purely co-incidental. Check the rear wheel bearings for a start and look to see if there are any signs of the tyres / wheels fouling against something. Look also at the levers on the inside of the drums that control the handbrake.

Next would be diff, pinion and propshaft .... hope it doesn't get that far.

[Difflock]

If I understand your description, this happens also when stationary...

Hi Andy,

Thanks for your response.

The sound is heard when accelerating only in first gear. It is not a constant sound but rather a 'che che' slipping type sound (the sound of a spinning tyre on tar). When releasing the clutch slowly when in first gear there is no sound. When releasing the clutch a little faster with more / sudden load on the system a distinct 'che che che' sound (between 3-4 che ches's depending on how quick I release the clutch. When I just crawl in first gear the slipping sound is heard when stepping on the accelerator - no sound on a down hill, a 'che' sound on a flat surface and a 'che che' on an uphill. When releasing the clutch the sound is more pronounced but because it happens also without the clutch being involved I guess anything to do with the clutch is ruled out. When slowly driving in 2nd or 3rd and depressing the accelerator there is no sound although the load is significantly less.

There is also a very light intermittent vibration coming from the engine bay at higher speeds. I can feel it in the accelerator pedal and almost throughout the vehicle. Don't know if this might have something to do with it. I had the prop shaft, Universals and centre bearing checked but nothing was found out of spec.

I had a look underneath the vehicle as well and there are no signs of the wheels fouling against something. My mechanical skills is not that developed yet so in all honesty I don't know what I'm looking for. The car has been taken to a mechanic who services my vehicles 3 times with no luck. The next stop would be Toyota themselves but I was hoping someone here might have had a similar problem which would allow me to be a bit more specific when taking the vehicle in. My experience with Toyota is that they tend to replace items quicker than they try to really diagnose a problem.

[Mud Dog]

Let your mechanic also examine the engine and gearbox mounts. From what you're now telling me I it sounds like the motor / gearbox are "wrapping" under torque, and if it 'wraps' (twists) far enough, something is fouling / touching something else - like the prop shaft touching the exhaust or something else - could also be a pulley wheel or fanbelt touching against something in the engine bay. If indeed something is fouling in this fashion, bear in mind that the mountings may not always be at fault, but could also be that what is being fouled against is fitted / set too close or has shifted too close.

I'm almost sure that one of the above is what's causing it.

[Aquanaut]

My first thought was that the pinion was starting wear. Up hills noise, down hill nothing.

[Difflock]

If it is the pinion, woudn't it be more of a whining, metallic or grinding type noise?

[LouisZ]

Check engine mounts. I found it a few times that one engine mount broke. A way to check is to look on the engine fan. Look at the tips if it touched the radiator cowling.

Check centre bearing on the prop.

For interest check U-Bolts on the leafsprings in back.

[Difflock]

I don't know. Am taking the car back to the leaf spring guys to check. Will take comments back from this forum for some fault finding with the mechanic.

[pietpetoors]

Do you hear the sound when driving straight or when turning?

[Difflock]

Both. It happens during the acceleration

[Difflock]

Hi Guys,

I've recorded the sound from underneath the vehicle. Listen carefully to the background noise you'll hear the strange screeching sound. Any guesses?

Check the video at: V2CLD.com/gfnuks

[Willem01]

Hou op sukkel, vat die bakkie na Louis toe hy is n expert en sal gou vir jou kan sê wat dit is...hy ken die lux'e

[Difflock]

Wa kry ek vir Louis in die hande?

[Mud Dog]

4x4Megaworld Menlyn

[Difflock]

Dankie. Sal da probeer

[Difflock]

Hi Guys, Some feedback. I took the Hilux to Louis. He spotted the problem almost immediately. The center bearing was not properly aligned. I did fit a new one but straight after that I repaired a broken leaf spring and had the leafsprings reset. This must have pushed it out of alignment since the noise developed after the leafsprings were reset.

Thanks again Louis!!

[Willem01]

cool..bly jy's uitgesort