924Board.org

ronafios · Joined: 14 Jun 2011 Posts: 26 Location: Canberra, Australia

Hi, first post!

I have recently started working on my red 1984 924 NA - having lots of fun and very thankful for 924board.org!

I have a (long) list of things to bring the car up to speed, except one undiagnosed sound. It's the same sound as in this clip

http://www.youtube.com/watch?v=thNx8ilpQLw

Essentially, it whines like in the clip when under acceleration, goes away when coasting.

Does anyone recognise the sound, and could perhaps help with diagnosis?

Ross.
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Follow the restoration of my Porsche 924 http://restore924.blogspot.com

joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

My current mobile connection will not allow me to hear the sound clip, however I can say that transaxle noise is common in our cars and can vary widely between individual cars. Setting gear lash is a critical art and is not easily addressed by the home mechanic. I have seen some very loud transmissions last a very long time.
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87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

leadfoot · Posted: Sun Jun 19, 2011 6:30 pm Post subject:

ok , a few questions first
what gearbox do you have?
how much oil is in the trans?
what type of oil do you have in it?
how old is the oil, when was it last changed?

so far as the whine, these gearboxes are fairly well engineered, as it's not under load the noise will dissipate but most issues are with syncros before anything else.
Lastly do you have the insulating rubber mat and carpet in the back hatch? The trans noise is 200% louder without it
Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

ronafios · Joined: 14 Jun 2011 Posts: 26 Location: Canberra, Australia

Thanks for the replies:

I've only had this car 2 weeks, most of which it's been on stands working on other issues. I'm not sure what oil is in there, I suppose a good start would be to dump it and freshen it up.

What oil are people recommending?

The rear sound deadening and hatch carpet are still in place.

It's a 1984 NA with a 5 speed manual. I'm not sure how to identify which exact transmission it has?
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Follow the restoration of my Porsche 924 http://restore924.blogspot.com

leadfoot · Posted: Mon Jun 20, 2011 10:05 am Post subject:

SAE 80 or GL4 specs
FYI you need a male hex key 17mm for the transaxle fillers and loosen both before you attempt draining,
stu
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...