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JSS Offline
#1 Posted : Tuesday, October 5, 2010 7:53:23 PM(UTC)
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Hi, can anyone advise what the standard diff ratio would be for Ht Monaro, 308, Trimatic, 10 bolt diff?
Regards JS
HK1837 Offline
#2 Posted : Tuesday, October 5, 2010 10:39:46 PM(UTC)
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Monaro or GTS? (I can't remember if it makes a difference). 10-bolts were either 3.08 or 3.36. My guess without looking at the bible is 3.08, but 3.36 should have been optional as the performance ratio anyway. I'll check tonight unless someone else confirms it or corrects me.

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JSS Offline
#3 Posted : Tuesday, October 5, 2010 10:41:55 PM(UTC)
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Thanks for that. It is a GTS.
Regards JS
HK1837 Offline
#4 Posted : Wednesday, October 6, 2010 6:02:31 AM(UTC)
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3.36:1 is standard, 3.08:1 is optional economy axle in GTS. If it was a Monaro the only axle available behind 308 auto was a 2.78:1 banjo, so there was no need to clarify if GTS or not (my mistake).

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70htprem Offline
#5 Posted : Saturday, October 23, 2010 6:08:12 AM(UTC)
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[quote]Originally posted by HK1837
3.36:1 is standard, 3.08:1 is optional economy axle in GTS. If it was a Monaro the only axle available behind 308 auto was a 2.78:1 banjo, so there was no need to clarify if GTS or not (my mistake).

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Standard ratio for an optional 308 trimatic with the rare 10 bolt in a HT is 3.08;1. There is no literature to support such a vehicle just like a 307 saginaw HK premier station wagon with a 3.55;1 10 bolt. It was'nt possible to get but modern motor tested such a car in 68. Sorry but this is a tricky department and I'm sure will be met with criticism. Even the Monaro story/facts does'nt support a vehicle like this. Does'nt mean it did'nt happen, as anything could be optioned =)
HK1837 Offline
#6 Posted : Saturday, October 23, 2010 8:55:59 PM(UTC)
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Not in GTS according to the bible. Standard is 3.36 with 308 auto. 10-bolt is standard also in all HT GTS with 5litre engine or bigger. In other HT eg Monaro, Premier etc 2.78:1 banjo was standard behind 307/308 auto with no optional ratios.

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70htprem Offline
#7 Posted : Sunday, October 24, 2010 5:46:25 AM(UTC)
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[quote]Originally posted by HK1837
Not in GTS according to the bible. Standard is 3.36 with 308 auto. 10-bolt is standard also in all HT GTS with 5litre engine or bigger. In other HT eg Monaro, Premier etc 2.78:1 banjo was standard behind 3-7/308 auto with no optional ratios.

And I stand corrected. Thanks hk1837
Warren Turnbull Offline
#8 Posted : Monday, October 25, 2010 8:02:43 AM(UTC)
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There is no literature to support such a vehicle just like a 307 saginaw HK premier station wagon with a 3.55;1 10 bolt. It was'nt possible to get but modern motor tested such a car in 68.

The car in question was built after the Monaro release, and that is when these options became available.

The only thing is this car had to have either a 3.36 or 3.08 rear axle ratio, as Holden did not allow air conditioning with a 3.55 rear axle as the engine speed was too high during highway cruising for the compressor.

All 307 manuals, no matter what vehicle, used a 10 bolt. Have seen Kingswood and Premier sedans and wagons with 10 bolts. In HT the 308 was the same, all manuals, sedan, wagon, ute, van and coupe have 10 bolt. The autos are as listed. Interestingly the HK and HT 307 auto with banjo are LSD and the HT/G 308 trimatic and powerglide with banjo are not.

This is all well documented. The one thing that I have seen that should not have been allowed is the radius rods on some cars that were not GTS.

Monaro story only documents Monaros but yes the Premier wagon was avaiable to the public in the combination that Motor purchased. They even specify that in their initial story.

Warren

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acegts Offline
#9 Posted : Monday, October 25, 2010 9:42:13 PM(UTC)
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quote:
Originally posted by Warren Turnbull
[i]Interestingly the HK and HT 307 auto with banjo are LSD and the HT/G 308 trimatic and powerglide with banjo are not.
Would the LSD have had something to do with the fine spline axles? like the SLR 5000 Toranas (LSD fine spline banjo)

FNQ HQ GTS/4
FNQ HQ GTS/4
HK1837 Offline
#10 Posted : Monday, October 25, 2010 9:52:50 PM(UTC)
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No. Fine spline didn't appear until 1973 XU-1.

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70htprem Offline
#11 Posted : Tuesday, October 26, 2010 1:20:53 AM(UTC)
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[quote]Originally posted by Warren Turnbull
There is no literature to support such a vehicle just like a 307 saginaw HK premier station wagon with a 3.55;1 10 bolt. It was'nt possible to get but modern motor tested such a car in 68.


All 307 manuals, no matter what vehicle, used a 10 bolt. Have seen Kingswood and Premier sedans and wagons with 10 bolts. In HT the 308 was the same, all manuals, sedan, wagon, ute, van and coupe have 10 bolt.

This is all well documented. The one thing that I have seen that should not have been allowed is the radius rods on some cars that were not GTS.

Thanks Warren,
I have also seen a HG 186 3 spd man. kingswood with radius rods.
As well as an Ermine white, Goya red, HK GTS 307 car with saginaw tunnel and no 10 bolt "hump". This car body was a very early car (S1)
And I think it was a Sydney car?
For the installment of a 10 bolt in wagons did they have the "hump" and tank installed?
HK1837 Offline
#12 Posted : Tuesday, October 26, 2010 2:54:27 AM(UTC)
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Early Pagewood HK GTS with 307 and banjo is quite common, but i've never seen a manual with banjo. Was the driveline in the car? It may have been an early production mistake where an auto car was fitted with a Saginaw hump.
AFAIK if the car had a Salisbury it got a hump and tank to suit. Warren may have more knowledge on this.

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Warren Turnbull Offline
#13 Posted : Tuesday, October 26, 2010 3:56:04 AM(UTC)
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To the best of my knowledge the 307 manual never had a banjo diff. It may have blown a diff and someone fitted a banjo. 10 bolts have aways been a little difficult to get your hands on, especially if you were just a "normal' person not into cars.

The salisbury hump is part of the rear floor pressing. There are two rear floors for a wagon/sedan/coupe/van/ute. standard and salisbury, so it would be fitted with a "bathurst" rear floor.

If you read the modern motor article they talk about the hole in the floor for the floor shift, but do not menion the rear floor at all, as it is part of the floor, whereas the console shift part is specially welded in.

Warren

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70htprem Offline
#14 Posted : Tuesday, October 26, 2010 4:05:26 AM(UTC)
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[quote]Originally posted by HK1837
Early Pagewood HK GTS with 307 and banjo is quite common, but i've never seen a manual with banjo. Was the driveline in the car? It may have been an early production mistake where an auto car was fitted with a Saginaw hump.
AFAIK if the car had a Salisbury it got a hump and tank to suit. Warren may have more knowledge on this.

Yeah, it could well have been what you point out as there was no driveline in the car. Definetely a 307 car with the speedo cable hole in the firewall and 80737 build designation.
Another interesting point was it was fitted with the "scissor" style booster, but crudely hammered inner guard below booster? Also had pressings in the 'A' pillars, and the bottom inner corners of the rusted out doors were flat???
Why I asked about the wagon is there is a cross brace that catches the floor when the backseat is down, and is right above the leading edge of the tank where the "hump" should be located. Kinda like the omission of the rear door armrests majority of the time in the wagons.
I thought they might have omitted the hump as well due to certain constraints for the wagons. I hope that JSS has had his question answered earlier as we probably are venturing away from the subject a little for which I must apologise. :)
Warren Turnbull Offline
#15 Posted : Tuesday, November 9, 2010 8:41:53 PM(UTC)
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It would seem that the 3.55 ratio was available with air con. (but not on 307 with manual and 3.55 rear axle)

As there was no driveline, and it has the saginaw hump and no salisbury hump, the 80737 would be a 6 cylinder GTS with optional heavy duty 4 speed.

Warren

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Edited by user Wednesday, November 10, 2010 4:09:13 AM(UTC)  | Reason: Not specified

castellan Offline
#16 Posted : Tuesday, November 9, 2010 9:55:21 PM(UTC)
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quote:
Originally posted by HK1837
Not in GTS according to the bible. Standard is 3.36 with 308 auto. 10-bolt is standard also in all HT GTS with 5litre engine or bigger. In other HT eg Monaro, Premier etc 2.78:1 banjo was standard behind 307/308 auto with no optional ratios.

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HG monaro 308 auto with 3.08 10 bolt salisbury yes they did come with originally factory fitted.
HK1837 Offline
#17 Posted : Wednesday, November 10, 2010 12:35:38 PM(UTC)
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quote:
Originally posted by Warren Turnbull
It would seem that the 3.55 ratio was available with air con. (but not on 307 with manual and 3.55 rear axle)

As there was no driveline, and it has the saginaw hump and no salisbury hump, the 80737 would be a 6 cylinder GTS with optional heavy duty 4 speed.

Warren

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I was just reading back through the posts and the car in query was quoted as a very early HK GTS in Ermine white. This is another anomoly as this wasn't an officially available GTS colour in early HK, so i'm wondering if it possibly has a chequered past? There was another early white HK GTS that was the subject of a major dispute a while back but it was an auto.

If it is a genuine thing then I agree with Warren on the 6cyl Saginaw thing.

Castellan, are you talking Monaro GTS? Monaro should only be banjo with 307 and 308 auto, but Monaro GTS will be Salisbury.

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castellan Offline
#18 Posted : Friday, November 12, 2010 4:18:55 AM(UTC)
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It were a Gen trimatic 308 auto 3.08 10 bolt salisbury in a HG MONARO GTS. back in 1982.

It seams weird that a std monaro with a 308 would only get a banjo and hears me thinking if i ever catch that mongrel who put a banjo behind the SLR 5000 Toranas.
HK1837 Offline
#19 Posted : Friday, November 12, 2010 5:29:45 PM(UTC)
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Yes that will be a 10-bolt, but it was Monaro I was talking about.

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Chevmad Offline
#20 Posted : Tuesday, March 1, 2011 9:17:19 AM(UTC)
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Please excuse the uneducated but how do I determine the ratio in my Salisbury without taking off the cover...is it stamped on the collar at the yoke like on later cars ? Being 307 P/G my thoughts would be on 3.08 as this is the ratio most common in Camaro's in the US next to 2.78. Would have thought 3.36 or 3.55 would be reserved mostly for 4 speed cars ??
Do i own a Mustang....you have to be joking ???
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