Gearbox/drive train noise.

[maxmc2]

Hi guys.

Not been around for a while with any queries but just wanted to run this by you guys.

I notice when at low speeds when i lift the clutch i can hear a clunking at the rear, not sure if its coming from the diff or drive shafts (two new half shafts replaced last year). Also when im selecting gears when stationary or at low speed i can hear clonks coming from the gearbox are when making selections, is this all normal or is there something going on? Could it be time for an oil change?

TIA, as always.

[Black VXR]

You likely need to add some friction modifier to your LSD

Others will advise, its a very common problem - what's the mileage - has the diff oil ever been changed

[SturdyHSV]

Sounds like a wild goose chase, but when my clutch fluid needed replacing the car was noticeably clunkier changing gears, both stationary and when moving. Given how easy it is to check, it may be worth a look to see if the fluid is still nice and clear, if not it won't hurt to flush it through anyway and it may help.

The clunk when pulling away is more likely diff related, but is very common and not usually considered cause for concern.

Do you get the low traction warning too when it clunks?

Again, this may sound silly, but is the battery nicely charged and in good condition? I only say this because whilst jump starting a friend's car (4.0 V8, so required some juice) despite being stationary and in neutral I got the 'clunk' type sound and low traction warning when he attempted to crank the car and I was at ~2,000 rpm. The cranking of the other car pulled the voltage down and seemingly that combined with the right rpm triggered some sort of confusion and lo and behold, lots of clunky noises and low traction warning, despite being completely stationary and not even in gear (so I was thinking ABS/TC related)

Edited by SturdyHSV on Friday 26th September 09:30

[MyM8V8]

maxmc2 said:

Hi guys.

Not been around for a while with any queries but just wanted to run this by you guys.

I notice when at low speeds when i lift the clutch i can hear a clunking at the rear, not sure if its coming from the diff or drive shafts (two new half shafts replaced last year). Also when im selecting gears when stationary or at low speed i can hear clonks coming from the gearbox are when making selections, is this all normal or is there something going on? Could it be time for an oil change?

TIA, as always.

What make of half shaft?

[maxmc2]

Thanks for the replies, its due for its MOT soon anyway so may get the oils changed at the same time.

MyM8V8 said:

What make of half shaft?

As far as i know they are Pedders half shafts.