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Noise Tranny Area #436244
December 18, 2014 07:03 pm UTC
December 18, 2014 07:03 pm UTC
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Etobicoke
Deep Mann Offline OP
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Hey Guys,

So the car is 97 GST. It was running really good and randomly started to run really rough at idle. When the clutch is depressed the engine shakes (almost like misfire) and when you press the clutch in it starts to run smooth.

In either case when you rev the motor it sounds really loud almost like spun balance shaft bearing. I pulled the tranny and everything looks good.

What you guys think ?


1998 Tsi Awd 10.6@134

Re: Noise Tranny Area [Re: Deep Mann] #436245
December 18, 2014 07:25 pm UTC
December 18, 2014 07:25 pm UTC
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Guelph, Ontario
Jeremy Gilbert Offline
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Originally Posted by Deep Mann
When the clutch is depressed the engine shakes (almost like misfire) and when you press the clutch in it starts to run smooth.


This is contradictory.. can you clarify? It runs rough if you don't touch it, then runs smoothly with the clutch pushed in?

I don't want to pull out the "C" word.. but sounds like you'll have to pull the oil pan off at the least and take a look. Might want to check endplay.


1995 TSi AWD
11.7@119 1.8 60' - Curse of the Bad Driver
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Re: Noise Tranny Area [Re: Deep Mann] #436246
December 18, 2014 07:34 pm UTC
December 18, 2014 07:34 pm UTC
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Ottawa, ON
Mike Eng Offline
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http://www.roadraceengineering.com/clutchandflywheeltech.htm

Check the "2g pedal pump up" section.

Last paragraph.

Jeremy might be right.


'99 GSX GT35R
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Re: Noise Tranny Area [Re: Deep Mann] #436250
December 18, 2014 09:04 pm UTC
December 18, 2014 09:04 pm UTC
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Etobicoke
Deep Mann Offline OP
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No end play. Yeah when you leave it running the engine shakes and when you press the clutch in it starts to run smooth.


1998 Tsi Awd 10.6@134

Re: Noise Tranny Area [Re: Deep Mann] #436252
December 18, 2014 09:29 pm UTC
December 18, 2014 09:29 pm UTC
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Guelph, Ontario
Jeremy Gilbert Offline
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Okay then yeah that's not likely crankwalk.

Sounds like something internal in the tranny.. maybe an input shaft bearing? I'd have to leave the speculation to people who know the insides a bit better, but my money is on you having to open her up.


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11.7@119 1.8 60' - Curse of the Bad Driver
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Re: Noise Tranny Area [Re: Jeremy Gilbert] #436253
December 18, 2014 09:53 pm UTC
December 18, 2014 09:53 pm UTC
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Ajax, ON
Reza Mirza Offline
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Originally Posted by Jeremy Gilbert
Okay then yeah that's not likely crankwalk.

Sounds like something internal in the tranny.. maybe an input shaft bearing?


That's what my guess would be.


1G DSM: 1000+ AWHP, 9.2@162.83 MPH
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Re: Noise Tranny Area [Re: Deep Mann] #436254
December 18, 2014 10:23 pm UTC
December 18, 2014 10:23 pm UTC
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Canada
Terry S Offline
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I just so happen to have a 2g FWD trans waiting for a new owner. Deep text me if you are interested.


Re: Noise Tranny Area [Re: Deep Mann] #436255
December 18, 2014 10:41 pm UTC
December 18, 2014 10:41 pm UTC
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Etobicoke
Deep Mann Offline OP
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So when it was pulled some bolts were missing, and there was a slight space very small between tranny and engine. What you guys think ?


1998 Tsi Awd 10.6@134

Re: Noise Tranny Area [Re: Deep Mann] #436257
December 18, 2014 11:20 pm UTC
December 18, 2014 11:20 pm UTC
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Guelph, Ontario
Jeremy Gilbert Offline
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I'm guessing that's probably what killed the input shaft bearing (forcing it to be on an angle).


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11.7@119 1.8 60' - Curse of the Bad Driver
PHP: 0
Re: Noise Tranny Area [Re: Deep Mann] #436258
December 18, 2014 11:21 pm UTC
December 18, 2014 11:21 pm UTC
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Concord, Ontario
Andre Mourinho Offline
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Any space beetween engine and transmission is bad. I mean, the correct space is good (the starter plate spaces the transmission from the engine the correct amount).

If your transmission is not aligned perfectly (both dowel pins) and everything torqued properly, you could have the issue you're describing... I hate to admit it, but it happened to me ONCE, and never again.

Good luck Deep


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