28 replies to this topic

[yel327]

V8's use a bigger uni. From memory the V8 Salisbury tailshaft is shorter than the V8 banjo one, can't recall by how much. There are 2 x A9X shafts too, one for Aussie 4spd and one for the Borg Warner box.

[yel327]

You need at least V8 unis or if one breaks and causes a bad accident you might find your insurance company walks away.

[rexy]

Just get one made up to suit. My Hardie spicer shaft has lasted over 15 years without incident.

[yel327]

When GMH put 350ci engines into HQ Holdens they used a 1 1/8" cup uni (same uni as a cab-chassis). So if you are getting a tailshaft made as suggested by Rexy i'd at least use a 1-tonner front yoke and bigger uni (I'm assuming you are using a trimatic, TH350 or aussie box and banjo diff?). This way you'll hopefully smash the rear uni or the banjo or snap an axle rather than drop the front uni.

 

A9X isn't much of a comparison for strength either as they were not a high performance engine.

[rexy]

Run a tail shaft loop and the strongest uni joints you can fit. Doesn't cost very much.
What diff are you using?

[hainzy]

Something like this HQ sedan one do Byron? Or are you better off getting the One tonner shaft?

 

 

HQ V8 sedan

http://www.ebay.com....=item19faec1061

 

HQ One tonner

http://www.ebay.com....583957089&rt=nc

 

and/or these..

http://www.ebay.com....=item19faebc7cd

Edited by hainzy, 23 March 2015 - 05:03 PM.

[yel327]

Tonner one will shorten but either rneed an adapter uni for the rear or a 1" uni end for it

[hainzy]

Do you mean the tonner one will need shortening?

 

Cos Im going through this same issue at the moment. Wondering what is the best tailshaft. Whatever you get will probably need new unis anyway, so is a tonner tailshaft with an LX torana rear uni grafted on,  the best way to go?

Edited by hainzy, 23 March 2015 - 05:28 PM.

[yel327]

I would try to steal the yoke off the tonner diff....If thats possible? Did they ever run bango's in the tonners?

 

No, all Salisbury's with HQ GTS350 1 1/8" yokes on them.

[yel327]

Do you mean the tonner one will need shortening?

 

Cos Im going through this same issue at the moment. Wondering what is the best tailshaft. Whatever you get will probably need new unis anyway, so is a tonner tailshaft with an LX torana rear uni grafted on,  the best way to go?

 

Tonner shortened with any normal Holden or Torana or Statesman V8 (253/308) end grafted on would work. A HJ-HZ Statesman (or wagon or ute/van) (L31 M41) shortened with a tonner front yoke would work too - these shafts have the 1 1/8" yoke end uni on them (which will take a tonner yoke) and the other end have the normal 1" V8 uni on the diff end. Not sure where the shaft diameter change is wrt where the uni cup has to be for a Torana though. HJ-HZ sedan/coupe with L31 M41 would work too and would only require shortening 150mm or so.

 

I remember the LH SLR5000 I wrecked out a few years ago had a Chrysler tailshaft with it to suit a 308 and Muncie from memory, I think it was for a 9" though. Maybe a Centura shaft?

 

I just found the data:

 

LH 6cyl shaft - 50.25" (1276mm)

 

LH V8 shaft - 49.95" (1269mm).

 

6cyl and 253 are the same 2.5" diameter. 308 is 2.75" diameter.

 

All HK-HZ Holden shafts are longer so could be shortened to suit. The smallest of the HK-HZ Holden shafts is 2.75" diameter alhough the HJ-Z L31 M41 sedan  shaft is listed as 71mm. The shortest of these at 53.71" is the HK-HG 307/327/350 with Salisbury shafts and the shortest with a banjo is a HK-HT 6cyl M21 or M22 (Saginaw transmissions) at 54.93".

Edited by yel327, 23 March 2015 - 06:45 PM.

[yel327]

I didn't realise you had a Salisbury in it. I get why you asked for A9X specs now. I don't have the length of one of these handy but I can tell you a HQ-HZ 6cyl shaft is 1" longer than a V8 shaft - so 6cyl-trimatic-banjo is 1" longer than 308-trimatic-salisbury.

If you use the tonner shaft you can actually use both ends and either buy an adapter uni that has 1 1/8" cups on one axis for the tailshaft and 1" cups on the other for the diff. Or change the yoke on the salisbury to a tonner one.

[hainzy]

Thanks Byron.

Yet again you are a wealth of info!!

 

So if Im interpreting all that info correctly, Im hearing:

 

A one tonner shaft is better because it has a bigger uni at the gearbox end?

And pretty much all V8 drive shafts have the 1 inch uni at the diff end which is compatible with the torana V8 1 inch uni at the banjo end?

 

So I need to have those grafted together. At the correct length obviously...

 

Ill go shopping. Cheers.

[yel327]

Thanks Byron.

Yet again you are a wealth of info!!

 

So if Im interpreting all that info correctly, Im hearing:

 

A one tonner shaft is better because it has a bigger uni at the gearbox end?

And pretty much all V8 drive shafts have the 1 inch uni at the diff end which is compatible with the torana V8 1 inch uni at the banjo end?

 

So I need to have those grafted together. At the correct length obviously...

 

Ill go shopping. Cheers.

 

Tonners are 1 1/8" at both ends. Normal V8's are 1" at both ends. TH400 (except HQ 350) are 1 1/8" at yoke end and 1" at diff.
 

[hainzy]

Sweet.

So for the sake of 1/8th of an inch at the yoke though, you could save yourself some dough and just get one V8 shaft which can be cut and made compatible with both ends.... Seems simpler and cheaper. Ill see what I can find in wrecker land... Thanks Byron.

[yel327]

I suggested the bigger uni as a good idea for the 350ci Holden engine, as that is what GMH used on the 350ci engines in HQ. For a 308 just use what GMH used (1").

[yel327]

Sounds good. I'd investigate the adapter uni too (1" on one axis an 1 1/8" on the other) for the rear - these are used when you put a ute/van diff in a tonner. That way you just shorten the tailshaft. Talk to whoever shortens it and they'll tell you what is best. 

[76lxhatch]

Just make sure if you go with the bigger diameter shaft you still have enough room around it for a safety loop, can be very tight

[hanra]

So the old 3in diam tailshaft that I took out of my car which the sandblasters damaged beyond repair, would the uni ends be useful to someone? I was just going to cut it in half and stick it in the wheelie bin.

[hainzy]

I just found the data:

 

LH 6cyl shaft - 50.25" (1276mm)

 

LH V8 shaft - 49.95" (1269mm).

 

6cyl and 253 are the same 2.5" diameter. 308 is 2.75" diameter.

 

Hey Byron could you tell me exactly where these measurements are taken from? If its uni to uni, is it from say, the outside of the gearbox end uni, to the inside of the diff end uni? If that makes sense....

[yel327]

 That data was taken straight from the LH Service Manual. As far as i'm aware GMH always measured from uni to uni centreline.