People who have a Hilux diff, I have a Hilux axle question!

[9000rpm]

I've seen RN20 and RN40? diffs and these don't seem to have a centre locator flange on the axle that sticks out long enough to locate the wheel proper hub centric style.

Most cars have them as shown here:


Has anyone had problems or broken studs because the wheel is only held on by the studs which take all the load?
I know KE10 axles are the same so maybe its just the older models.

[MWP]

I was wondering about the exact same thing when fitting some wheels to my new RN25 diff yesterday...

[9000rpm]

Does anyone use a Hilux diff?!

[joecoolmk2]

I reckon if they're fine on a loaded up hilux then they'll be fine for your car.

[Smokey228]

Ive got a hilux diff in my celica, all i know is its a RN2* series and its 1400mm long drum face to drum face...

It had a locator. I know cause it was 67mm in diameter from memory and i had to machine out the centre of my disks for it to sit properly.

EDIT: Actually now that i think about it, i dont think its long enough for a wheel to sit on there too...
I assume its not important cause there are 5 studs... But what if you've converted it to 4 stud???

Cheers,
Jase

[9000rpm]

Yeah they do have a 67mm locator but it doesnt poke out enough to hold a wheel.

Wheels should normally locate in this centre piece and take all the load of the car so the studs dont have to.

I take it most Corollas/Celicas/Coronas etc have a 60mm centre hub spigot thing to locate the wheel, do the ends of the Hilux axles have enough meat on them to be machined down to 60mm to fit ST141 rear discs and to match the front hub size?

[Smokey228]

I wouldnt say so, as they aren't a solid built up area, they have a built up area kinda like a cylinder with another built up line through it. (i think thats how they look)

If you were to machine 7mm off that cylinder wall, you'll be getting real close to breaking through... I think...

Cheers,
Jase

EDIT:
Like this one...

*pinched from infotechplus's How To: MA70 brake upgrade thread*

I also realise that this sits out enough for the wheel to hang off. I wonder if mine does this with the disk brake upgrade ive just done...

[DX20VT]

Does anyone use a Hilux diff?!

I run a hilux diff in the rear of my KE70.

Has AE86 Disc's on it and as said before the centre's need to be machined out to suit the dia. of the hilux axel.

On mine they stick out far enough to locate the wheels,
and so the should, as if there is enough to stick out the thickness of the drum, when you replace it with a disc, in theroy it should still stick out the same.

I run a welded centre though as the Hilux LSD's are not good enough.

[9000rpm]

Yeah if you machine of 3.5mm it looks like it will be too thin.

Thanks guys.

[Pure_In_Sanity]

My RN41 hilux has been fine for 25 years without having the wheels located on the spigot.
However... If you have to machine the centre hole in the disk, it would be good to go a little larger & fit a locator ring inbetween.

For example: If you're running ford wheels with a 70mm centre bore, you could machine the disk out to 70mm & run a 1.5mm thick ring that sticks out enough to centralise the wheel. Just like what is shown in the pic above.

(different wheels may require axle spigot to be machined down first)
Just my 2cents
Cheers
Phil

[stradlater]

I've no idea what my diff has, locator or no locator, but it's taken a f'ing pounding and is still fine.

[timbosaurus]

I take it most Corollas/Celicas/Coronas etc have a 60mm centre hub spigot thing to locate the wheel.

Don't be too concerned about that. No aftermarket wheels I have used or seen have the center hole sized to suit the car that they are on, and never have I broken wheel studs.

There are two reasons I can see for this.

1) The centre support would only help supporting the load of the car, it would do nothing to protect against the torque that is turning the wheel.

2) When the wheel studs are done up nice and tight, all the strength is actually in the friction between the wheel and the hub, not the shear strenght of the wheelstuds. If your wheelnuts become loose, then yes, the shear strentgh of the studs will come into play and trust me, you will break studs.

I see where you're coming from, but Timbo says you won't have issues.

Cheers,
Tim

[medwin46]

I beg to differ. The whole purpose of the centric hub on axles (and front hubs) and centre bore of wheels is to locate the wheel on something 'centric'. Yes timbosaurus is correct in saying the friction between the wheel mounting face and hub assists in the load bearing, but in this instance excessive force is acting on the studs, which will eventually lead to failure. I had rings 0.9mm thick machined up for my wheels on my ute, so precise they are now an interferance fit. I have seen the result of no locating rings being used, having the wheel mounted only on the studs, they work themselves loose in a matter of kilometres, which leads to more forces being placed on the studs and again, failure. My hilux diff in the 86 has enough centric hub to fit my rx7 rotor on and still have 10mm or so hub to locate on, thus allowing for floating spacers if required. The wheels my old man fitted to his hilux needed to be spaced out half an inch, so locating spacers were made up, which located on the hub itself and then had a locator on the spacer to locate the wheel, still illegal of course but not as illegal as not having a wheel properly fitted. Ie. Only located on studs. I really would go to the trouble of fixing the centre hub or having rings made to locate the wheels on, it'd only be a matter of time otherwise.

[medwin46]

Don't be too concerned about that. No aftermarket wheels I have used or seen have the center hole sized to suit the car that they are on, and never have I broken wheel studs.

There are two reasons I can see for this.

1) The centre support would only help supporting the load of the car, it would do nothing to protect against the torque that is turning the wheel.

Cheers,
Tim

ALL aftermarket wheels i have seen come with a fitment ring to suit the car specified when wheels are ordered if the centre bore of the wheel does not match that of the hub on the car. The hub centric mounting bears the weight of the car, the studs do take the torque loading of the car which is enough for 5x 12mm threads to take, adding the weight of the car onto these is just asking for trouble by exerting even more ever changing forces on them.

[MWP]

This is my RN25 diff with the MA70 brake conversion.

Any suggestions on what i can do with this??