Need expert to decipher these numbers, please

[Zendalar]

Today I was thinking stuff, under my car. Was thinking what to remember and what to do when I remove the engine from the car on next Saturday. Well, I decided to write down the serials..

What I found were these, could somebody tell me what they mean. My car is a -72 2.4T so I thought if these were right parts...

Near the oil sump were these numbers 901.101.101.4R

Heads had this number 911.104.306.0R


And also if you could tell me the year and if there is anything special with this 915 box: 915 301 101 0R. The gearbox had this hand stamped number and I don't know what that is for: ?5/02 732141


Drive axles were made by LÖBRO and they had 05-75 on them


Thanks in advance.

PS: I looked at the exhaust valves from below and they all seemed to be in awful condition, deposits, pits, oil and such....

[Early_S_Man]

Zen,

The '??5/02' is a damaged stamping of 915/02, a 'Type Number' consistent with a '72 model.

The first three digits of your serial number are consistent with a 1972 six-cylinder application, 915/02 five-speed transaxle ... but there should be four digits in the sequence number, for a total of seven digits in the serial number. As your finding indicates, the numbers stamped on that bottom rib, although the ONLY ID numbers on the transaxle ... can be damaged or obliterated by contact with curbs, rocks, and other objects driven over!

Ring & pinion is 7:31 -- 4.429:1
1st gear -- 11:35 3.182:1
2nd gear -- 18:33 1.833:1
3rd gear -- 23:29 1.261:1
4th gear -- 26:25 0.962:1
5th gear -- 29:22 0.759:1

[Zendalar]

Thanks Warren, knew I could count on you

Too bad that there were no surprises there, I was hoping like limited slip, different heads etc etc

[Early_S_Man]

Zen,

The early 915's did not have a stamped code to indicate the presence of a ZF limited-slip differemtial ... I believe there was a paint spot mark to indicate the ZF-equipped units.

And, those cylinder heads are carbureted 'T' heads for a 2.4 application.

[Roland Kunz]

Hello

Warren said all,.......


Most numbers are casting numbers witch are not the final item#

The Löbro 05-75 indicates the build date yet most Porsche parts have the build date somwhere.

Grüsse