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what transmission do i have?

i saved a file on my computer months ago with all the numbers and cant find it...but here is a pic,...can anyone give me any details

Old 12-11-2011, 12:19 PM
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gearhead
 
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1980 930 gearbox.
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Old 12-12-2011, 07:29 AM
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Originally Posted by Matt Monson View Post
1980 930 gearbox.
can you please let me know where you got that from

and is it LSD?
Old 12-12-2011, 10:35 AM
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gearhead
 
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It's what I do for a living. I know how to decode the serial number. The 930/34 was used on the turbos during the 911sc years.

There's no "12" between the type number (930/34) and the start of the serial number so it doesn't have an LSD.

All the serial numbers start with 77. The 3rd number is the year. The "0" indicates 1980. The rest of the number is just a sequential production number. You've got the 87th 930 gearbox from 1980.

Regards,

Matt Monson
Guard Transmission LLC
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Old 12-12-2011, 10:55 AM
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Hello Jim,

The tag under the hood in the front laugage compartment will tell you if your car originally came with a limited slip diff. the code for that is "220", listed in the 3 line, titled options.


Mark
Old 12-12-2011, 10:56 AM
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Easist way to tell if it has a lsd is turn one axle flange and if the other side flange turns the same way it has a limited slip differential.
Lock one flange in place and turn the other with an inexpensive bending bar type torque wrench and watch the torque reading it takes to turn it. That will tell you the condition of the clutch discs if you know it's a 40% ZF lsd carrier inside.

If the other axle flange turns the opposite way it's an open diff or one wheel wonder. If the car is all together you can also do that by jacking up the rear of the car and turn one wheel while the transaxle is in nuetral and if the other wheel turns the same way it's lsd, etc.

Not all hood stickers are still there especially if the cars color ot hood has been changed and even if 220 is in the option code list someone could have removed it by now.
Old 12-12-2011, 01:01 PM
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it is a grey market euro car, i thought they all had LSDs
Old 12-12-2011, 03:57 PM
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Originally Posted by jimtweet View Post
it is a grey market euro car, i thought they all had LSDs
No, unfortunately not
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930 Turbo '81 Too many modifications to list
Old 12-13-2011, 12:06 AM
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