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Aussie 3spd/4spd date codes and serial numbers.
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Hi all. I am putting together a data base on serial numbers and date codes from aussie 3 spd and 4 spd gearboxs. If anyone has any old box's lying around that these details can be noted on and sent my way I will really appreciate it. If you do not know where to look they are here  The date code which should look like this  and here  The serial number which should like this.  Cheers Paul.
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hi paul, do you need to know what sort of car they came from? or just the date/serial number code on the box?
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Hi Dave.
Just the date and serial code is fine thanks.
Cheers Paul.
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I have one that is 13 K 7 13 Oct 77
serial T943981
Now this came in the boot when I bought my A9X and was told it is the original box however I am sceptical as it does not have the "497" shaft in it so is not M21 internals unless it has been swapped around .
If someone knows their numbers perhaps they could enlighten me.
Its a December 77 built Torana so would an Oct 77 gearbox be fit this build date?
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Good on ya Paul, Id be pleased to help, but not a manual gearbox in the house/shed.
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High voltage.
Your numbers seem to have thrown a spanner in the works, because with the few date codes I have from around the same time as your date code I would have expected it to have a serial number of around the 809xxx region.
The only other box I have with a serial number up near the number of yours is from around the mid 1981 time frame.
As to the correct date for your car.
I have not looked in to matching date codes on the boxs to production dates, but I would expect a month before the build date on your car to be about right going by other casting to build date details I have.
By the way serial numbers from around that time show a very rough production figure of around 2800-3000 units per month as compared to back in the early 70s of around a 10 000 per month figure.
Premier 350 thanks for the encouragement if you happen to see a old box lying around remember me and see if you can find the numbers on the box.
Thanks guys Paul.
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i have a few V8 4 speeds but there in cars so ill have to crawl under and have a captian cook and report back in a few days
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Hi Dave.
Thanks for the offer but if there a drama to get dont bust your gut,s to get them.
Just bare me in mind if you see any box,s lying around that are easy to access.
Cheers Paul.
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no worries mate, i have 2 autos on in the shed but all my manual boxes are in cars, i MUCH prefer driving manuals, dunno why, my wife hates it she recons there a pain in the arse
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13 K 7 wouldnt be 87 by any chance?
As I said I have no idea what this box came out of only what I was told which is not reliable!
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I am not 100% on the Commodores but if my information is correct the last aussie box would have been in a VK which ended sometime after the release of the VL so February 1986. To this point in time the highest number I have is a 1 E 2 1st of may 1982 with T949415 and by this point the monthly production rate was down to around 1700 units per month. So to clock over the 1 million Aussie box,s made by the end of the VK,s production rate would have had to have been over 1100 box,s per month. So even if this was the case and the numbers restarted at 000000 the numbers would still be very low by the end of the VK,s. So 13K7 would be 77. Since I posted above I have a few more serial numbers to compare too and the serial code T943981 would be from around the December 81 or January 82 range. So a date code of maybe 13M1 or 13A2 against your code of 13K7. Cheers Paul. Edited by user Monday, 24 August 2009 8:06:45 AM(UTC)
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Hi, just had a look at an old aussie 4 speed I got down in the shed. Date code is 1G5, (Im assuming thats July 1st,75), serial no. is T703313.
Matt.
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quote:
Originally posted by hq ss
I am not 100% on the Commodores but if my information is correct the last aussie box would have
been in a VK which ended sometime after the release of the VL so February 1986.
Would the VL V8s have had the last of the Aussie four speeders?
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Thanks for the details Mat and you are correct, with that date code and serial number it was cast on the 1st of July 1975.
Jim. I thought that it would be VL as well but the only thing I have here as reference for VL is a Holden
Heritage book and it says that VLs had the Trimatic only for the V8s no 4 spds.
If anyone knows anything to the contradict this please let me know.
Cheers Paul.
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Definately VK as the last of the Aussie 4 speed boxes.
The VL 6s all had Nissan boxes.
The VL V8 was auto only, except the 2 Group A models, and HDT optioned cars, which all got a T5/T5G box.
Cheers,
Mick
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Cheers,
Mick
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Paul
Ive got a dozen or so Aussie 4spds in the shed, plus a 3 speed or two and another 10 or so up at a mates place. So ill dig up the numbers when I get a change and feel like getting dirty. Ive also got a complete early HK Kingwood sedan with an original all synchro 3spd setup in it. Itll be a good one for you as itll be early-mid 1968 cast date. Only problem is getting the numbers off it as the car is complete.
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hey guys ive got 2 rebuilt m21s and wonder what they were out of.
# 1c4 T963729 has switch on linkage plate, whats it for?
# 9c4 T964856 no switch on linkage plate
whats better early or late m21s did gmh improve the design over the years. cheers Gary
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Switch is for ADR27A. Only allows full vacuum advance in 4th gear. Given the box cast date the sise plate is not original for the box. Those cast dates place them in HQ, but the cases could be from anything (M20, M21, M22) so possibly also LJ for the first one and LH for the second.
The better boxes are the post 1972 (or thereabouts) where the front seal changed from a scroll to a rubber seal. In Aussie 4spds there is no strength difference between M20, M21 or M22 either, except possibly reverse gear in an M21 which lists as a different part number.
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Thanks for the info Mick, so that confirms the VKs as the last aussie 4spd fitted cars.
HK1837 any details that you come across and send my way will be very much appreciated.
The HK one would be good to have a look at as to this point the earliest box I have is a 2nd of 1970 box with a T132749 number. So I am curious to see where the numbers started buy as I said to Dave before if it is a drama do not be to worried about getting it.
Chrome yella HK1837 as filled you in as far as the the better box side of things and what the switch is for but a slight correction to what he has said is that.
1C4 T963729 in this case is a 1st of March 1984 box as the serial number is from that era.
9C4 T964856 is a 9th of March 1984 box.
So going by that they both would have had the ADR 27A switch side covers fitted from factory.
Cheers Paul.
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i was bolting the gearmount on the first box #1c4 T963729 and noticed that 18 84 had been stamped into the back of the alloy ext housing. it was in a wb van been wrecked 10yrs ago. but it has m21 gears
the second m21 came out of a 5th month hq sandman van and had been rebuilt by diff trans in sydney. it appearrs they put the original bits back into a later housing. it has one groove, the first m21 has 2 they both have genuine gmh m21 clusters (cant remember #
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