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HQ_SS_Andy Offline
#1 Posted : Tuesday, 16 April 2024 12:39:26 PM(UTC)
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Hi all.
I'm in the market for an HQ V8 sedan driveshaft. 253 with M20 and Salisbury diff.
The book states code 'D' for this, which equates to:
Length=56.47/56.53 inches
Diameter=2.75 inches

But it doesn't specify how the measurement is taken. Would the length be measured from centre to centre between the uni-joint couplings ?

Tks&Rgds,
Andrew.
Dr Terry Offline
#2 Posted : Tuesday, 16 April 2024 2:20:31 PM(UTC)
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Originally Posted by: HQ_SS_Andy Go to Quoted Post
But it doesn't specify how the measurement is taken. Would the length be measured from centre to centre between the uni-joint couplings ?


Yes, that's correct. Centre to centre of the uni joint cups.

Dr Terry
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HQ_SS_Andy on 28/04/2024(UTC)
HK1837 Offline
#3 Posted : Tuesday, 16 April 2024 3:59:33 PM(UTC)
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That is a relatively easy shaft to find. Any HQ to HZ coupe or Holden sedan with 253/4.2 manual or auto, or 308/5.0L manual or HQ coupe or Holden sedan with 308 auto will have one. They will be white originally. Part number 2814339, 56.22" to 56.28" CL to CL of uni joints, 0.065" thick steel tube.
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HQ_SS_Andy on 28/04/2024(UTC)
HQ_SS_Andy Offline
#4 Posted : Tuesday, 16 April 2024 11:47:26 PM(UTC)
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Thanks Dr Terry and HK1837. That helps.
You would think it would be easy to find. But I've been on the lookout for a while and the only ones that seem to pop up are for the longer wheelbase. I see these all the time for some reason.

HK1837, the length you specify is slightly different to what is listed in the manual (see my first post). This is a bit odd.
Also, were the different tailshaft variants different colours ? So if I see an original looking white one for example, there's a good chance it'll be the V8 short wheelbase variant ?

Rgds.
HK1837 Offline
#5 Posted : Wednesday, 17 April 2024 8:29:56 AM(UTC)
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Yes, the most common is probably the standard wheelbase HQ (wagon, ute, van and statesman). The short (sedan/coupe) and long (cab-chassis) are not quite as common although you'll find that the 6cyl tailshaft from a Holden sedan is very common, the V8 one less so. But still a common tailshaft compared to others.

That length is straight from the HQ Engineering Technical Specifications for HQ, there is no tailshaft listed with the length you quoted.
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Dr Terry Offline
#6 Posted : Wednesday, 17 April 2024 10:26:37 AM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
That length is straight from the HQ Engineering Technical Specifications for HQ, there is no tailshaft listed with the length you quoted.


I've got those same specs listed (Length=56.47/56.53 inches). From memory they were straight from the HQ factory workshop manual.

Dr Terry
If at first you don't succeed, just call it Version 1.0
Sandaro Offline
#7 Posted : Wednesday, 17 April 2024 11:27:48 AM(UTC)
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A Quarter inch discrepancy will not make a difference in the fitment. So if you find one at either if those lengths it will be fine.

The yoke length into the gearbox allows a fair degree of leeway.
HK1837 Offline
#8 Posted : Wednesday, 17 April 2024 12:23:55 PM(UTC)
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Originally Posted by: Dr Terry Go to Quoted Post
Originally Posted by: HK1837 Go to Quoted Post
That length is straight from the HQ Engineering Technical Specifications for HQ, there is no tailshaft listed with the length you quoted.


I've got those same specs listed (Length=56.47/56.53 inches). From memory they were straight from the HQ factory workshop manual.

Dr Terry


I think you'll find it's wrong. I'll attached the relevant pages from HQ and HJ Engineering Tech Specs. In HJ they state 56.3" (143cm), which appears to be an error generated by back conversion from 143cm. One thing this shows that I never realised, cab-chassis V8 tailshafts are actually larger diameter than the 6cyl ones.

Hmm, for some reason I can no longer upload images to my Albums. Doesn't work on Chrome or Edge anymore. It goes to some sort of CloudFlare verification to check if I'm human, and auto confirms. Then doesn't put the image into the album.

Edited by user Wednesday, 17 April 2024 3:42:37 PM(UTC)  | Reason: Not specified

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WagonDan Offline
#9 Posted : Wednesday, 17 April 2024 2:49:49 PM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
Hmm, for some reason I can no longer upload images to my Albums. Doesn't work on Chrome or Edge anymore. It goes to some sort of CloudFlare verification to check if I'm human, and auto confirms. Then doesn't put the image into the album.




I've had this exact problem for about 2 weeks now. I thought it was on my end but obviously not....
HK1837 Offline
#10 Posted : Wednesday, 17 April 2024 3:42:06 PM(UTC)
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I emailed the Admins to see what's going on.
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HQ_SS_Andy Offline
#11 Posted : Wednesday, 17 April 2024 4:44:48 PM(UTC)
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Thanks all for responding.
I currently have a VN 304 with Turbo 700 transmission in my HQ sedan.
I will be replacing this with an original 253 and M20 4 speed.
I would like to have the tailshaft ready to go when I do the swap.

HQ workshop manual specifies 1435mm tailshaft length.
Engineering specs list it as 1428mm.
The one in the car measures 1415mm centre to centre.

So, the one in the car is 20mm shorter than the manual suggests and 13mm shorter than Engineering specs.
Since there is quite a bit of wiggle room with the slip yoke insertion, I would like opinions on whether my existing tailshaft might be usable with the 253/M20. A quick google suggests the Turbo 700 has a 27 spline output shaft, so perhaps even the slip yoke won't need to be changed.

All opinions welcome BigGrin
Rgds.
HK1837 Offline
#12 Posted : Wednesday, 17 April 2024 5:16:15 PM(UTC)
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When you fit a 4L60/4L60E the standard shafts are definitely too long. I think the measurements on the GM trans that we got here are:

TH350: 28 1/4"
4L60/4L60E (same as TH700R4): 29"

So about 3/4" difference. I think the 308 with TH350 shaft is interchangeable with the 4.2 Trimatic/manual shaft but there is a tiny difference but it doesn't matter.

The TH400 box is supposed to be 31 15/16" long and its shaft for a HJ-HZ 308/5.0L sedan is quoted as 55.6" which is about 18mm shorter than the Trimatic one. So that may be the shaft you actually have in the car now. What size cup uni is on it? TH400 use a 1.125" cup uni on the front yoke aka 1-tonner yoke.
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HQ_SS_Andy Offline
#13 Posted : Wednesday, 17 April 2024 9:22:46 PM(UTC)
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Thanks HK.
Front uni cup is 1". Diameter is 2.75".
It may be the original shaft cut down slightly....or a new one that's been made up.
With the shaft only being 13-20mm shorter than what it should be, it may still work OK.
If I don't find an original one soon, I'll trial fit this one and see how much of the yoke slides into the gearbox.

Rgds.
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