Also, how to decipher between which ones have LSD and what else I need to know about the VIN #'s?

 

https://www.928gt.com/t-928codes.aspx

LSD - 220

 

Gives all information for transmissions from 1985-1989. Just missing OBs and GTs.

http://members.rennlist.com/pirtle/s4atrans.htm

 

Great link above but what about models newer than 89 regarding info on trans?

Also, what is OB's? I realize what GT's are... sorry for my lack of knowledge.

Thanks,
Bryan

 

OBs are the model years pre-85 so '78 to 84. The GT class started in '89 to '91 and then GTS from '92 to '95.

 

Try this one for which car has which transaxle:
http://928gt.com/t-928trans.aspx

 

There is a set of three tech spec books within the WSM & other document CD that you can buy.

It has the breakdown by year of the code sequence that is stamped on the underside of transmissions.

That is the indicator to use. To confirm, there are a couple garage tests as well as pulling cover off to see what is inside. Latest series, post 89, have a different kind of locking setup.

The tech spec books are also useful for breaking down the meaning of the chassis and engine numbers.



Other online resources can be used to search a VIN for factory options.

 

OB stand for "Old Body" or Old Bugger" or Old B(something else)."

Generally means the very early cars with the CIS "K-jet" mechanical injection, although that is somewhat debatable.

Up to 85 is often called "SOB" - "Sort of Old Bugger"

And the CD-ROM set Landseer refers to is the "Moorehouse CD."
Roger has it for $75. Best investment you can make for one of these cars. All the shop manuals, tech bulletins, full parts catalog and a lot more.

I just got mine, and have spent several hours skimming through it. Tons and tons and tons of info.

 

The one you want is the 4 speed 2.54 with LSD that starts out in 1st gear not 2nd.

 

What car did that one come in?

 

Thought that was available on 85/86 RoWs.

 

The 89 auto is the keeper. I recall its 2.52. Yes, it starts in second, but deep footing the throttle gives you instant downshift to first if cables are set right. I put one into an 84 USA car and its nasty.

 

+1

 

+1 2.54 gearing I believe

 

Thanks for all the help!! I got what I needed.

I am guessing PSD is some form of LSD for the newer trans.