[928uk] Anorak trivia - SE gearbox writing

[Paul R Smith]

re: and perhaps also some early GTS have 55 boxes. You'd be pretty 
pissed off if you bought a GTS with uprated and cooled-oil gearbox and 
found that it had a GT box. Smiffy
On 07/12/2023 22:22, jonathanrackowe--- via 928uk wrote:
> The 3rd and 4th digits are a pair representing the gearbox version. These numbers run from 03 to 13 and then 55 and 57 for the last variations. They do not necessarily coincide with model or model year boundaries - that as we know is common with many Porsche part changes.
>
> So 55 is not specifically GT. Club Sport, SE and perhaps also some early GTS have 55 boxes.
>
> Info here:https://www.stuttcars.com/porsche-928-transmission-codes-all-years/
>
> Best regards,
> Jonathan
>
> 928 GT 1991 Amethyst Metallic
>    
>
>
>
>
>
>
> -----Original Message-----
> From: 928uk<928uk-bounces at lists.928.org.uk>  On Behalf Of Simon Crowe via 928uk
> Sent: 07 December 2023 21:39
> To: Paul Lacey<t595 at btinternet.com>
> Cc: 928 List<928uk at lists.928.org.uk>
> Subject: Re: [928uk] Anorak trivia - SE gearbox writing
>
> Hi Paul ,
>
>   I’ve just noticed mine is 57 which is assume is for the GTS.
>
> I believe 55 is GT.
>
> Cheers,
> Simon.
>
>
>> On 7 Dec 2023, at 21:09, Simon Crowe<simon.crowe at e-crowe.com>  wrote:
>>
>> 
>> I used this when I decoded my own GTS box.
>>
>> The 55 relates to the 928 model being a GT, but oddly your SE and my GTS both have this 55, so the interpretation may not be entirely accurate.
>>
>> 1st = Gearbox type, G = manual gearbox
>> 2nd & 3rd = Car model, 28 = 928
>> 4th & 5th = More precise type, 55 = GT
>> 6th = Blank
>> 7th = Differential type
>> 1 = open diff (M219)
>> 2 = ZF 40% LSD (M220)
>> 3 = PSD (M221)
>> 8 = Model year, same as 10th digit in VIN, eg L = 1990
>>
>> ABCDE = Serial number within year and gearbox type
>> first normal box in '90 and '91 was 00501
>> 00001...00100 was reserved for testing
>> 00301...00400 was reserved for special boxes
>>
>> Cheers ,
>> Simon.
>>
>>>> On 7 Dec 2023, at 20:45, phil rick via 928uk<928uk at lists.928.org.uk>  wrote:
>>>>
>>> hi Paul
>>> i would post it on the " 928 club-sport : updates " thread on rennlist,
>>> Samuel should know.
>>> cheers
>>> Phil
>>>
>>> On Thu, Dec 7, 2023 at 8:27 PM Paul Lacey via 928uk<928uk at lists.928.org.uk>
>>> wrote:
>>>
>>>> Hi,
>>>> This is probably only of much interest to SE owners and genuine 928 Anoraks
>>>> :-)
>>>> Whilst cleaning the underside of my No.2 SE I've come across hand written
>>>> text on the rear of the gearbox differential cover.
>>>> Previously I (and others) have found hand written "Clubsport" on the engine
>>>> sump but this is only visible if engine or cross member are removed.
>>>> The writing on the gearbox is much more interesting but the reason for this
>>>> post is for opinions / translation of the third line of writing - since I
>>>> have zero German (except some swear words).
>>>> So here is a photo:
>>>>
>>>>
>>>> https://drive.google.com/file/d/1KIhZuDlzDXgbdMyKIYnaog_uQqAtWKhi/view?usp=s
>>>> haring
>>>>
>>>> And this is what I know / see:
>>>> Where there's a question mark is indicating what I'm unsure of....
>>>> In brackets is info I've added
>>>> And especially the third line - could it be the builders name ? Any
>>>> theories
>>>> ?
>>>>
>>>> G 28.12     (Mod.88 Manual ROW)
>>>> Spd ? 40%  (LSD fixed 40%)
>>>> J-Progxxxx  ?
>>>> Club-Sport
>>>>
>>>> Then there's the stamping on gearbox rear flange: G28 55 2J 10509
>>>> Meaning:
>>>> G28 = gearbox type
>>>> 5 = five speed
>>>> 5 = unknown why there's a second 5 ?
>>>> 2 = ZF LSD M220
>>>> J = year 1988
>>>> 10509 = 9th gearbox produced (1st serial number starts 10501)
>>>>
>>>> Note: I immediately checked rear cover of my other SE's gearbox and I think
>>>> there was something there but it's been obliterated by light corrosion.
>>>>
>>>> Best regards,
>>>> Paul Lacey
>>>>
>>>>