Another transmission ID to decipher-please help
 

Last weekend I was finally able to pick up my 3.3 Turbo motor for my project. I also picked up a 915 tranny. The id follows:

915/63 12 74 D 2565

Please help id ! It was represented as a 915 out of a 78 SC w/ factory LSD. Thanks boys.

Rich

looks like a 80/81 the only difference between the 78/79 is a modified 2nd gear ratio. LSD could of been added later though.

Tim in Sac

The 'D' code means it is an '83 production year trans, and the '12' means ZF limited slip was fitted at the factory ... to the USA version 5-speed.

1st - 11:35
2nd - 18:32
3rd = 23:29
4th - 26:26
5th - 28:23

R & P - 8:31

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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler

Warrn,

How will those ratios compare with the 3.3 turbo motor it's mating with? Thanks guys.

Rich

Rich,

Overall ratios
915/63 930/34

1 12.33 9.50
2 6.89 5.51
3 4.88 3.77
4 3.88 2.63
5 3.18

First is lower, 2nd & 3rd in the 915 'stradle the 930's second gear, 4th gear is only slightly lower than the 930's third gear, and 5th gear is lower than top gear in the 930 ... meaning that top speed will probably rpm-limited, not power limited!

All-in-all, a 'close-ratio' box for the 3.3, and plenty of fun to drive, in my opinion!
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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler

[This message has been edited by Early_S_Man (edited 10-06-2001).]