Noise while in diff lock

Matt Baxter · Feb 17, 2012

We were out lastnight doing some of the more challenging lanes round here, I have used diff locks few times now and never had a problem or noises but last night it made quite a nasty grinding type sound but only when struggling for grip when I was trying to get up and over a large patch of lumps rutts etc all up a steep hill, so before I pull all the transmission out is there and thing I should be checking for first??
Any help is much appreciated
Cheers
Matt

jamesmartin · Feb 17, 2012

try it with each prop of in turn in diff lock as it may be something in each axle first

Matt Baxter · Feb 17, 2012

I would but it only does it under Extreme load,

Oh btw it a manual tdi300 if that helps

jamesmartin · Feb 17, 2012

you could check the oils for cotamination/debris ,remove t/box sump and check condition of bearings (movement freeplay in gears)

GreenHornet · Feb 17, 2012

Was this the lane in Hindhead that we cam down on Sunday?

A low pitched vibration, (I have one in 5th) under heavy load could be clutch release bearing.

You could put the diff in Lo, and the gearbox in fourth. If the noise isn't there then the problem is the layshaft. By putting the gearbox in fourth you bypass it as I believe all the other gears use the layshaft but fourth just joins the input and output shafts together.

If this isn't conclusive then drop the fluids in the diffs, you need to do that anyway as it hasn't been done since you had it but it has been through some water lately lol. This could tell you were a problem lies.

Finally and it is worth a look, I have noticed that having the props greased properly makes a big difference. I did mine again last night and it is soo much smoother.

mrruffle · Feb 18, 2012

if you need another centre diff i might have a spare kicking around

Matt Baxter · Feb 18, 2012

Cheers for the help guys! I drained the transfer box earlier and also removed the cover but there was no real amount of damage to be seen

Well other than 1 chip

Really can't see that being the problem, maybe I have used magic oil as it is fine at the mo

GreenHornet · Feb 19, 2012

Perhaps the oil was old and hence too thin now. Good fresh oil is obviously a better lubricant.

Matt Baxter · Feb 19, 2012

GreenHornet said:
Perhaps the oil was old and hence too thin now. Good fresh oil is obviously a better lubricant.

think I spoke too soon lol its still there, oh well never mind Iwill wait till something drops off

GreenHornet · Feb 19, 2012

Matt Baxter said:
think I spoke too soon lol its still there, oh well never mind Iwill wait till something drops off

Shouldn't be too long the way you tackle the lanes lol. Did you have fun today

Matt Baxter · Feb 20, 2012

Lol yep won't be long till it ****s its self lol, yeah mate was pretty good thinking of trying Salisbury plain this weekend if you are interested?

Noise while in diff lock

Matt Baxter

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jamesmartin

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Matt Baxter

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jamesmartin

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GreenHornet

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mrruffle

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Matt Baxter

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GreenHornet

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Matt Baxter

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GreenHornet

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Matt Baxter

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