Question about the 5-speed
Thread Starter
Nordschleife Master
Joined: Aug 2002
Posts: 9,010
Likes: 2
From: South Texas
Question about the 5-speed
What type of a transmittion does a 1983 928 5-speeed have?
The mannor mine shifts seems to indicate the older conventional type.
I have trouble beliveing that Porsche mate such a backward transmittion with such an advanced engine.
The basic question is in the 1983, Porsceh 928's transmittion the type where the gears side, or the type that uses dog toothed syncros?
Thanks
The mannor mine shifts seems to indicate the older conventional type.
I have trouble beliveing that Porsche mate such a backward transmittion with such an advanced engine.
The basic question is in the 1983, Porsceh 928's transmittion the type where the gears side, or the type that uses dog toothed syncros?
Thanks
Pro
Joined: Aug 2002
Posts: 501
Likes: 0
From: Hotlanta
I believe, and I could very well be wrong, that te 5-speed uses dogtoothed synchros. This just from memory of reading the service section of the shop manuals on the 5-speed. it discused dogteeth and what-not.
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Joined: Jun 2001
Posts: 6,469
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From: Ball Ground, GA
A 1983 model should have either a G 28.05 or G 28.08 transmission.
These units have the earlier Porsche-designed multi-cone sychronizers. Yes, they are dog-tooth synchros.
The synchros were changed in 1985 to the Borg Warner-design synchros that are more effective and longer-lasting.
You can not retrofit the later synchros into the earlier transmissions.
Some owners have reported better shifting by changing the transmission oil to RedLine or Sweptco. A search of the Archives should give you all the info that you need on this subject.
These units have the earlier Porsche-designed multi-cone sychronizers. Yes, they are dog-tooth synchros.
The synchros were changed in 1985 to the Borg Warner-design synchros that are more effective and longer-lasting.
You can not retrofit the later synchros into the earlier transmissions.
Some owners have reported better shifting by changing the transmission oil to RedLine or Sweptco. A search of the Archives should give you all the info that you need on this subject.
