Thread: Fabricated 4WD Diffs based on the Ford 9"

Originally Posted by CJT

John, thought you might be interested in this extract from the QLD gov infrastructure site.

"4.2.11 Off-Road and Goods Vehicle Wheel Track
The wheel track of off-road four wheel drive vehicles and goods vehicles (MC, NA, NB ADR
category) must not be increased by more than 50mm beyond the maximum specified by the
vehicle manufacturer for the particular model.
If a solid axle from another manufacturer is used, the wheel track may be increased by 50mm
beyond the maximum specified by the vehicle manufacturer for that particular axle, provided all
other requirements such as clearances and the tyres do not protruding outside of the vehicle
bodywork."

Unfortunately that extract "4.2.11" is from the National Code of Practice, Section LS.

Although QLD has adopted the NCOP, as far as I can tell they have provisions to be read in conjunction with the NCOP. These have specifically excluded the last part concerning a solid axle from another manufacturer.

So I'm afraid I'm back where I was, and the track can only be increased by 50mm from that specified by the vehicle manufacturer (i.e. Land Rover, not the manufacturer of the axle.

John,

I went back and had a look and noticed the same thing.

The clause that I quoted was out of VSB14, whereas the NCOP for QLD appears to have removed that clause.

Having said all of that, the engineer I have been talking to was happy to approve, engineer, mod plate for the axle substitution and +50mm offset and +50mm tyre size over that of the substituted axle.

Originally Posted by Slunnie

I suspect for the studs you'll be constrained by the D60 side of things.

Up there Buds Customs is who I'd contact.

After a little bit of research last night it looks like somewhere along the lines Jeep could have possibly run a 5 x 4.5 stud pattern and it would seem that this may be able to work with D60 stuff and 35 spline axles, however not as a full floater.

I will see about contacting Buds in a few weeks time as i would be interested in getting the housings done by them.

I know for the one of the Hilux SAS swaps they did, the axle tubes was something like 12mm thick

Dana 44 came in 5 x 4.5

Dana 60 comes as small as 5 x 5.5

So your doing all this just to run a 33????

Originally Posted by def-90

So your doing all this just to run a 33????

That is exactly what I have been thinking......maybe for 38's..........

Originally Posted by def-90

So your doing all this just to run a 33????

Stardard rover diffs are barely capable with stardard 29" tyres . Nothing wrong with over engineering , And yes i do belive in a fuse

With 32" I must of wasted my time and money