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Aussie 3spd/4spd date codes and serial numbers.

Started by _HQ SS_ , Aug 22 2009 04:12 PM

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25 replies to this topic

#1 _HQ SS_

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Posted 22 August 2009 - 04:12 PM

Hi all.
I am putting together a data base on serial numbers and date codes from aussie 3 spd and 4 spd gearbox's.
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

Posted Image

The date code which should look like this

Posted Image

and here

The serial number which should like this.

Posted Image

Cheers Paul.

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#2 Collo

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Posted 22 August 2009 - 07:10 PM

Dunno the point of this, but I got some boxes in the shed I can look at...

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#3 _HQ SS_

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Posted 23 August 2009 - 11:54 AM

slr_v8
I have had a few people try to ID when there box's were made and the date codes are not always readable.
But the serial numbers seem to be sequential the same as engine numbers so if a date code cannot be read
a list of serial numbers with known date codes can help date that box.

Any details that you can supply will help give a more accurate date verse serial number database for the
people that want this information.

A sideline to it is that it gives a idea to manual aussie gearbox's production numbers.
For a rough example so far it shows a very rough production figure of around 2800-3000 units per month for late 1977 early 1978 as compared to back in the early 70's of around a 10000 per month figure.
So from that it looks like auto box's get fitted a lot more in later years than manual box's.

Thanks Paul.

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#4 wot179

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Posted 23 August 2009 - 12:41 PM

I have 3 3speeds here.They all have noteable differences in the way the numbers are cast.

The first box has a smooth case.No ribs.

. 1(this digit appears about an inch above and to the center of"HOLDEN"

. HOLDEN
. D201

Serial number is T262149

The second has a regular ribbed case.

. 10H3
. HOLDEN

serial number is T519923

The third is a ribbed case

. B170
. 7433725
. 4 (this digit appears to the left of the numbers above and the "HOLDEN" below
. HOLDEN

Serial number is T133460

Thats the best I could do.They are in a dark corner of the shed and the camera wasnt happy trying to photograph closeups with a flash.

Ive tried to display the markings as they appear on the boxes.(it didnt work so I've added descriptions)

Hope this assists in you in your quest.Cheers,Craig.

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#5 Collo

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Posted 23 August 2009 - 01:14 PM

I've got 1 v8 and 3 6 cyl 4 speeds I think. Have to move some stuff to get to them.

I'm sure some people on here would have a few boxes layin round...

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#6 _HQ SS_

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Posted 23 August 2009 - 03:02 PM

Thanks Craig.
Some of these numbers can be a bugger to see even with good lighting.
D201 is a 20th of April 1971 cast housing. (Early date code style)
10H3 is a 10th of August 1973 cast housing. (Late date code style)

The B170 Serial number T133460 one is a bit strange, as all the other date coded and serial numbered ones I have
from around there are the early smooth case box's not ribbed case's.
Maybe they were using both mold's at that time.
I assume the 1 4 etc are cast time reference numbers as the highest I have found so far is 12.
slr_v8 I will appreciate the numbers but don't bust you back to get them.
Cheers Paul.

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#7 Collo

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Posted 23 August 2009 - 05:17 PM

Hey mate, I just had a look, I got 2 v8 and 2 6 cyl 4 speeds. Cast dates were a pain in the ass to read, mostly worn off...

V8- 23K3 T550039
- 91E2? T949415

6- B222? T352113 Yellow case on this one for some reason.
- 17G5? T707079

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#8 _HQ SS_

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Posted 23 August 2009 - 06:02 PM

Thanks slr_v8.
By the date codes.

6cyl - B222 T352113 is a 22nd of February 1972 cast housing.

V8 - 23K3 T550039 is a 23rd of October 1973 cast housing.

6cyl - 17G5? T707079 is a 17th of July 1975 cast housing.

V8 - 91E2? T949415 is a may 1982 cast housing. (This is the newest casting number I have come across so far for a aussie box)

The serial numbers seem to match up correctly to those date's too.
Cheers Paul.

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#9 Collo

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Posted 23 August 2009 - 06:12 PM

No worries mate.

I'm curious as to one thing though, how far out should the gearbox cast date be from the build date of the car?

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#10 _HQ SS_

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Posted 23 August 2009 - 07:11 PM

I have not really looked in to that side of things with this because most of these box,s are not in there original cars
but I would expect it to be a month or so before the cars build date.
The same as most other parts.
But on saying that I have found parts that are from a couple of months to a couple of weeks before the finish
date on the car (depending on what the parts are).

Thanks again for the details guys.
I posted on 4 sites about this and have a few more details to add to my database now, so I will do some calculations and try
and work out a couple of monthly average's of productions and post them when I have finished them.
Cheers Paul.

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#11 Collo

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Posted 23 August 2009 - 07:20 PM

Cheers mate. None of mine match my car, not suprised though.

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#12 _BATHURST-32D_

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Posted 26 August 2009 - 06:33 AM

mate, today once i hit the shed i will take the time to mark down all the 4speed boxes i have and get the numbers up for you,,, i am chasing a mid 71 box or case g or h casting for my 71 bathurst, i will pay top dollar for it or even swap parts, i will be watching this thread.

cheers gong

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#13 _HQ SS_

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Posted 26 August 2009 - 10:58 PM

HI Gong any details you want to send my way will be very much appreciated.
If I come across any G or H casings in my quest for data I will bare you in mind.
I have a F 21 1 casing but it is a V8 3 spd box and that is the closest I have on my records so far to what you are looking for.
Is the casing you are looking for a smooth casing or a ribbed casing.
Cheers Paul.

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#14 jamecs

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Posted 18 May 2010 - 12:00 PM

12L8 cast date - 12 November 78

T775037 serial

6 cyl, 4 spd

not the original box then..

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#15 _HQ SS_

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Posted 19 May 2010 - 09:39 PM

Hi James.
Thanks for the details
From the couple of details I have from around it.
T775037 comes in between T773576 6th of the 8th 1976 and T786770 24th of the 2nd 1977.
So would it be possible that the last number on the date code is a 6 not a 8? so 12th 11th 1976.

Either way 76 or 78 if it is now in a LC it is not the original case for the car.
I would expect a LC to have a serial number from around T 34xxxx (very very late LC) and below depending on the vehicles actual date of construction.
The gearbox internals could be from any time frame if the box as been apart or the originals from the case if it has never been apart.
Cheers Paul.

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#16 jamecs

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Posted 19 May 2010 - 10:04 PM

Could be possible, the cast date was very faint, but i'm pretty sure it was an 8.. If you've got details that say otherwise then i'd be more inclined to go with you though!

Cheers

Edited by jamecs, 19 May 2010 - 10:04 PM.

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#17 lx308

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Posted 21 April 2012 - 05:37 PM

Hi Paul,
Heres what's in my Feb 73 XU1. To me, by the look of the date code, it should be a smooth case, not ribbed??

Serial number is T297664, date code H21.

Posted Image

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#18 _HQ SS_

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Posted 22 April 2012 - 10:25 PM

Thanks for the details.
From what I can work out the ribbed case's and the smooth cases were out at the same time for a while
but ribbed were more prominant from around the mid 1971 on time frame.
I do not have a huge amount of details from this time frame and to begin with I did not note the case style. (so that does not help)
But on saying that the T297664 number and the date code do look to be from around the same time frame (August 1971) so do match as such.
The cluster part number is what I have listed as M20 LJ XU-1.
The input is a slinger type but from what I can work out the C35 is a date code or batch code.
Does it have any other numbers on it at all.
As to tooth count on the third gears I do not have a Xu1 3rd to count so all I can tell you is this
3rd GEAR
M20
2813 491
21 teeth

M21
2813 492
22 teeth

Cheers Paul.

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#19 lx308

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Posted 22 April 2012 - 10:51 PM

Nah, only has a 2 or Z on the R/H side behind the selector opening. The input shaft has a part number & holden on it, but thats about all.
Has a 21 tooth 3rd gear.

Thanks Paul.

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#20 arrimar

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Posted 31 January 2014 - 07:52 PM

HQSS, thanks for your research on fast lane etc
I found it interesting.

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#21 slr5640

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Posted 02 February 2014 - 12:38 PM

Yep

I wanna say thanks as well as I have been able to sort out the production code on my 4 speed ......was reading the "1" as a seven .its an 81 box not a 77 !

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#22 gavwell

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Posted 07 April 2015 - 10:35 PM

Find this is an interesting to see where my boxes fit in with this. Couple of questions.

I have found that the Holden and date stamp may be the correct way up or upside down along with the date code and embossed No. any idea of Why.

Some Box have a 6 and some have an 8 and some don't have either of these any idea of what that stands for.

8H8 T838471

2D8 T846173

11L5 T725032

3M5 T728195

20E1? T934108

K112 T424663

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#23 Bigfella237

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Posted 07 April 2015 - 11:44 PM

Quick question, do you reckon this serial number sequence was only used with Aussie 3 & 4 speeds?

Has anyone looked at the date codes and serial numbers from say a Trimatic to see if they fit into the mix?

It wouldn't surprise me if GM used the same numbering sequence on all their "T"ransmissions? Other things like engine numbers ran sequentially across six and eight cylinder engines of various sizes, just with a different prefix.