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legalities of wider diffs

General Tech Talk

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legalities of wider diffs

Post by hypo »

just wonder wots the legal stance is on putting wider diffs under a car...

i was under the impression that track width was only allowed 2 increase by 25mm ??

if wider diffs r fitted and the rig is engineered does it then make them legal or does the 25mm adr rule come into voiding the engineers cert just like the tyre argument on enginneers papers ????
:finger: HYPOFAB :finger:

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Post by hotrod4x4 »

in NSW

it goes by the factory specs on the diff u install

"possibly" for commercial vehicles only?? not too sure
but for 4wd's , def. goes by the fitted diff , not the vehicle specs
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Post by hypo »

ok cool so if i were 2 put 80 series diffs under a zook, as long as i got it engineered and had the wheels and tyres covered by guards or flares it should pass ??????
:finger: HYPOFAB :finger:

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Post by hotrod4x4 »

yep , just get the tyres covered and then engineer the swap
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Post by slosh »

I thought you'd be the last person to ask this question hypo, seeing as you've already done it once.
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MEX
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Post by MEX »

IF YOU ARE A QLD'ER REFER TO PAGE 20
http://www.transport.qld.gov.au/qt/driv ... _Jan05.pdf
:)
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Post by Nev62 »

MEX wrote:IF YOU ARE A QLD'ER REFER TO PAGE 20
http://www.transport.qld.gov.au/qt/driv ... _Jan05.pdf
:)
MEX


Gee, I did'nt realise you northen guys had so many regs. I thought there was just one that went something like this.....









NO.

:D
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Post by Shadow »

Nev62 wrote:
MEX wrote:IF YOU ARE A QLD'ER REFER TO PAGE 20
http://www.transport.qld.gov.au/qt/driv ... _Jan05.pdf
:)
MEX


Gee, I did'nt realise you northen guys had so many regs. I thought there was just one that went something like this.....









NO.

:D

if you read the 30 or so pages

that pretty much sums it up :P
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Post by Dee »

hit the nail on the head...

it shits me to tears.... damn qld...
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Post by Mick_n_Sal »

There appears to be a loophole -

They allow the replacement of diff housings etc.
They do NOT specifically state that the width of the assembly be the same as original housing.
They state that track width can only be increased by up to 50mm with beam axles on 4x4s

So, if one took wider axle assemblies, fitted them with wheels with up to 100% backspacing - the centre track requirements could still be fulfilled. ( none of this takes into account increased wheel bearing loads etc )

Just a thought .....
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