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clunking transmission
https://forums.tipec.net/viewtopic.php?f=25&t=2359
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Author:  Drjonnycatbiscuit [ Mon Dec 15, 2008 8:52 pm ]
Post subject:  clunking transmission

Not having had one of these guys before, I've noticed a bit of what I can only describe as "slack" in my transmission.

When coming off the throttle in gear there is a noticeable "clunk" as the wheel speed overtakes the transmission speed, and vice versa when accelerating again.
Happens in every gear, so not the gearbox I don't think.

Is this normal?? :roll:

Author:  tr7v8 [ Mon Dec 15, 2008 9:37 pm ]
Post subject:  Re: clunking transmission

There is quite a lot of play in the 944 trans, if you take the boot carpet out & drive with the seats down it'll sound like the gearbox is about to fall out!

However there is a failure mode in the clutch whereby the hub breaks up & creates a clonk noise.

First shot is to check the gearbox oil. They must NOT be run with a low level it will knacker the box, preferably change the oil for fresh stuff & preferably Swepco from Berlyn as it'll imrove the shift & cut the racket. Whist under there check all the driveshaft bolts with a torque wrench as they can come loose. If any are loose, either locktite them & replace & tighten, or better replace with new 'uns.

Author:  Richy_S [ Mon Dec 15, 2008 10:43 pm ]
Post subject:  Re: clunking transmission

I would check the driveshaft UJ's first.

Rich

Author:  Li Moo Bai [ Tue Dec 16, 2008 8:43 am ]
Post subject:  Re: clunking transmission

I suspect the clutch is failing in time -honoured fashion.

Author:  MisterGT [ Tue Dec 16, 2008 9:54 am ]
Post subject:  Re: clunking transmission

Sounds like the clutch to me as well as mine was doing something similar until the clutch was replaced.

Author:  Drjonnycatbiscuit [ Tue Dec 16, 2008 1:54 pm ]
Post subject:  Re: clunking transmission

Thanks for the suggestions folks - I'll try the obvious ones first (the UJs, and bolts) - how much is a clutch likely to cost me?

John

Author:  MisterGT [ Tue Dec 16, 2008 3:08 pm ]
Post subject:  Re: clunking transmission

Drjonnycatbiscuit wrote:
Thanks for the suggestions folks - I'll try the obvious ones first (the UJs, and bolts) - how much is a clutch likely to cost me?

John


You dont want to know :(

Author:  Drjonnycatbiscuit [ Tue Dec 16, 2008 10:39 pm ]
Post subject:  Re: clunking transmission

MisterGT wrote:
Drjonnycatbiscuit wrote:
Thanks for the suggestions folks - I'll try the obvious ones first (the UJs, and bolts) - how much is a clutch likely to cost me?

John


You dont want to know :(


uh...yeah...I do... :bounce:

Someone tell me please. Either just supplied or supplied and fitted; and estimates will be fine!

Author:  MisterGT [ Wed Dec 17, 2008 12:22 am ]
Post subject:  Re: clunking transmission

Well as you asked (hope your sat down)

I believe the Sachs kit is around £400, but then you may be looking at £300- £400 for fitting.
Kit can be had from the usual sources (Berlyn, GSF etc)
Mine was replaced at the same time as I had a 48k service plus new belts and a lot of other bits (see viewtopic.php?f=25&t=2249) so I cant give a clear price as to labour costs but John Mitchell quotes £795 plus vat fitted.

Author:  Drjonnycatbiscuit [ Wed Dec 17, 2008 8:32 am ]
Post subject:  Re: clunking transmission

:pale: :pale: :pale:

Anyone want to buy a 1984 Porsche 944? Lovely condition... (lol)

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