gearbox 8/65 question

[Frank Barrett]

'65 912 451326 has trans 221466 (902/1); delivered August '65 at factory in US spec.

Frank

[Jon B]

my chart for this trans

902/1 from 220001 to 221721 912 ending 1965 07 26
902/1 from 221722 to at least 232398 911 & 912 1966
902/1 from 234001 to 238942 912 1967 5 speed
902/1 from 130001 to 131571 911 1967 5 speed
902/1 from 3280001 to 3281317 911 1968 5 speed

So only in 1966 was this trans shared between the 911 & 912 from the same serial range, otherwise each model had it's own serial range.

Dave's chart is probably the best guideline for this transmission.
There seems to be no factory chart with '66 transmission serial numbers.

Jon B.

[davep]

'65 912 451326 has trans 221466 (902/1)

do you have the date code from this one Frank?
Oh, and the case casting # also please; trying to figure out the .02 to .0R in that serial range. A photo of them together would be helpful; they are near the diff side cover.

[Jon B]

Photo of a transmission casting date

902/1
222518
10/65
901.301.101.02

Number 10 indicates the week, not month, the housing was cast in 1965.



Jon B.
Vista, CA

[davep]

the progression of casting dates is a bit odd, but I often see these in reverse order; sort of first in last out inventory practice.
222024 20/65
222127 14/65
222518 10/65
222567 25/65
222868 31/65

[Jon B]

the progression of casting dates is a bit odd, but I often see these in reverse order; sort of first in last out inventory practice.

Probably not intended practice, it just occurred that way on occasion.

The dates were important for quality control, if casting flaws were discovered, but otherwise didn't matter to Porsche if housings were used out of date sequence.

Jim should pull down all his 901 housings and photograph them for you ;-)

Jon B.

[pss]

Great info. Thanks!

Do you also have the period chart for the 901/0 gearboxes for the 911 in 1965?