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azzd

New Member

• Nov 8, 2010

• #1

hi all my back diff is whining on my p38 can anyone tell me what spline it is i aws going to strip it down today and have a look but its been ****ing it down all day my mate has got a range rover classic will that diff fit thanks look forward to any helpfull replys.

 

jorjio_k

Active Member

• Nov 8, 2010

• #2

did u check/top up,or even replace ur diff oil b4 moving to something else?

 

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azzd

New Member

• Nov 8, 2010

• #3

hi mate yes changed diff oil its noisier wen going slower ?

 

jorjio_k

Active Member

• Nov 9, 2010

• #4

how did u pin point that it is ur rear diff?what do u hear?i am asking coz maybe it can be something else then the diff.does it fluctuate with speed?if yes at wht speed?

 

goonarmy

Beer tester

LZIR Despatch Agent

• Nov 9, 2010

• #5

i thought i had a wining diff but it turned out to be a cv joint

 

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azzd

New Member

• Nov 9, 2010

• #6

the only change in sound is it really sounds coggy when travelling slow say about 5mph and whistles when travelling at from 40 to 70mph sounds a bit like you got cheap off road tyres on if that helps

 

Datatek

Well-Known Member

• Nov 10, 2010

• #7

Check that the VCU hasn't seized.

 

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azzd

New Member

• Nov 10, 2010

• #8

what is a vcu????

 

Datatek

Well-Known Member

• Nov 10, 2010

• #9

azzd said:

what is a vcu????

Click to expand...

The Viscous Coupling Unit, it acts as a centre diff lock. If it's seized it can cause some of the problems you describe although it's usually the front diff that suffers.
To check it, jack one front wheel off the ground, it should be possible to turn it with a great deal of effort. If it cannot be turned at all the VCU has seized

 

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azzd

New Member

• Nov 10, 2010

• #10

ill try that mate then get back to ya thanks for the help

 

norseman

Well-Known Member

• Nov 10, 2010

• #11

azzd said:

hi all my back diff is whining on my p38, my mate has got a range rover classic will that diff fit thanks

Click to expand...

To the best of my knowledge the diffs are not interchangeable.

 

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azzd

New Member

• Nov 10, 2010

• #12

checkt the vcu and i carnt turn the wheel at all ? is it a big fix and how much:

 

goonarmy

Beer tester

LZIR Despatch Agent

• Nov 10, 2010

• #13

azzd said:

checkt the vcu and i carnt turn the wheel at all ? is it a big fix and how much:

Click to expand...

before saying cant move it put a wheel brace on the jacked wheel and lean on it.Theres a video on here somewhere, its hard work gettinbg it moving

 

goonarmy

Beer tester

LZIR Despatch Agent

• Nov 10, 2010

• #14

here my thread is wiv the vid http://www.landyzone.co.uk/lz/f10/arrgghhh-cant-find-viscous-coupling-thread-55631.html

 

Datatek

Well-Known Member

• Nov 10, 2010

• #15

goonarmy said:

before saying cant move it put a wheel brace on the jacked wheel and lean on it.Theres a video on here somewhere, its hard work gettinbg it moving

Click to expand...

I can turn mine by gripping the tyre and heaving, it's hard but it does turn If the VCU has seized, fix that first. I check mine at every service.

 

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azzd

New Member

• Nov 10, 2010

• #16

hi mate wots it like to fix is it a big job and wer is it thanx