23 replies to this topic

[rexy]

So, apart from the special and now unobtainable a9x stubs are the stubs fitted from HQ to WB all the same or are there differences that make using a particular set an advantage?

[enderwigginau]

There are a bunch of different types Rex.
You are looking for a set of tonner ones as they are heat treated.

there is thread round here somewhere that gives the correct part number.

Grant..

[yel327]

From part numbers there are a few different types:

HQ-HJ drum brake 7432662 (these are the same as HK-HG);
HQ-HX disc brake 2820996 and 7 (with cast iron calipers) (these should also be the same s HT-HG);
HQ-HX Drum brake 1-tonner 9932966;
HQ-HX Disc brake 1-tonner 9932964 and 5 (with cast iron calipers) - same as L34.
HX-WB disc brake 9943693 and 4 (with cast/aluminium calipers);
HX-WB disc brake 1-tonner 9943695 and 6 (with cast/aluminium calipers).

From memory the calipers for cast/alloy PBR or Girlock from HX-WB are just machined a bit different in the caliper mount area.
1-tonners are heat treated for superior strength, when you clean them up they are all purple and blue around the inner bearing area.

A9X are nothing special as far as I know, they are just HX-WB 1-tonner examples to suit allo/cast PBR or Girlock calipers.

[yel327]

You are right, the tonner and normal are interchangeable. There would be no hassles using the standard ones on a road car (except tonner), I wouldn't bother chasing up tonner examples unless it was for a 1-tonner.

The HX part catalogue is quite clear though on different part numbers for early full cast stubs vs the later cast/alloy calipers. There must be a slightly different machining on them to suit the different calipers.

[76lxhatch]

All HQ - WB calipers fit all HQ - WB stub axles.

I think yel327 is correct above about the machining though, while the bolt pattern is identical some stubs may require extra machining to fit certain calipers?

[yel327]

Yes Chopper they should fit and that is my experience too, but they are not the same which was the question originally asked.

[yel327]

Something changed in HX with both tonner and normal to cause a change in part number for both. It is probably insignificant making them interchangeable, but there has to be a difference. I'll look next time i'm near a pair, but it'll most likely be in the caliper mounting area as this is the noted point in the HX parts catalogue.

[yel327]

HQ-mid HX tonner stubs will also be identical to mid HX-WB tonner (heat treated and thicker in ball joint area) except in the area that makes them a different part number (something to do with the caliper). It's the earlier ones you'll want for an L34, later ones for A9X.

[76lxhatch]

These are Torana stubs but they must have had the same thing with HQ-WB:


If you look past the dirt on the right stub axle, you'll see that it has different machining around the brake caliper mounting holes and won't fit some types of calipers (at least not without some more machining)

edit: actually I never noticed this until now but the one on the right may also sit the steering arm slightly differently too?

Edited by 76lxhatch, 18 November 2010 - 06:51 AM.

[yel327]

I'd say you are spot on. One will be for LH-LX with cast caliper, the other will be for the PBR allot/cast caliper as seen on some LX and UC. I'll bet when I look close at HQ-mid HX side by side with mid HX-WB i'll see the same thing.

[wot179]

Ok,heres a challenge for you numbers blokes.

Ive recently pulled the stubs and calipers out of a HZ tonner.

Cast aluminium calipers.

One stub has the number "GM43696" on the outside face,Im guessing this is correct HZ/A9X.It is also blue from heat treating.Dunno where the "99" went from the front of the part number,its not there.

There is also a letter "G" cast into it on the back face below the top ball joint.

The other stub,by comparison,has no numbers that match the above list,it also shows no "bluing" as a sign of heat treating.

My question is,what is it out of?

On the front face just below the top balljoint is the number "65". Nothing else on the front face.

On the back face it has "43 95" and about an inch under that is "GM" above the number "65"

No other marking are apparent.

My best guess is that it has been replaced by one from a HQ-X.

Can anyone positively confirm this?

Edited by wot179, 18 November 2010 - 04:24 PM.

[wot179]

Yeah,thats what I figured.

Onto the shelf they go for future reference.Ill jam them into something.

Cant list them on ebay as LX HOLDEN TORANA A9X STUB AXLES RARE !!!!BROCK BATHURST!!! if the numbers aint right........

[rexy]

Had a hunt around in the shed and lo and behold a pair of tonner axles were found:
32965 ( passenger side) and 32964 (drivers side). Also had a pair of HX calipers to steal the long slides from. Stubs still had good discs attatched.
So have inserted all into the front end of the hatch with the original steering arms and standard height springs.
If it stops raining I will see how things have turned out and discover if harrop arms are needed for my tastes.
R

[rexy]

Inner or outer edge?
10,000 K might last me 20 years for the "good" car!

[rexy]

Drove the car today. If anything it seems better than before handling wise. As measured I have gained 2cm of lowering from the change over. Perhaps this has helped behaviour a bit.
With the commodore rears it brakes very nicely.
Given the parts were free and it took 2.5 hours to do it seems well worth it so far.
Will let it settle in for a while and then maybe look at adding 1 inch lowered springs.
R