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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 01-08-2008, 04:02 PM   #1
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Question Clutch Advice

Its time for a new clutch, I'm getting the reverse "clunk", weird hums when driving, and had a few qusetions;

Here's what I got

1999 9-3 HOT
K&N cone filter
GS Sport Exhaust
22mm Rear Sway bar (not really relevant here)

1. Should I get the Viggen clutch kit or a spec clutch and a viggen PP?
(I would like to get a stage 3 ECU upgrade in the future)

2. Is there anything else I should replace while "I'm" in there???

Oh I was thinking of getting a GS fly wheel if funds permit.

Thanks for your input.



Damn I almost forgot, how manys hrs of labor am I looking at???
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Old 01-08-2008, 04:17 PM   #2
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Well Viggen clutc, viggen p/p, and the flywheel are an awsome stage 3 combo as thats what I have.

I however can tell you that if you have the reverse "clunk" and humming when in reverese moving that you probably want to start setting aside for another trans. I had the same problem and I'm at the point that I have either a.) push my car back or roll back to get into reverese now or b.) Pulling the shifter into Reverse as I'm pulling to a stop until the gears line up. It's a major pain in the ass.



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Old 01-08-2008, 04:31 PM   #3
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Get any clutch that's black.

Always bet on black.
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Old 01-08-2008, 04:37 PM   #4
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I agree with Nahum. Don't go for the spec unless you plan on going stage 4+.

I've got the viggen pp/spec stg 3 in my 900 and its quite grabby.
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Old 01-08-2008, 05:19 PM   #5
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Do a Rear main seal while you have the flywheel off. If you replace it, great. If you dont, make sure to get it turned at a machine shop so it is nice and smooth

Also make sure you replace the slave cylinder as well. If I can think of anything else you should also do while there, i will post again.
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Old 01-08-2008, 06:06 PM   #6
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Thanks for all the advise, guys. I only get the "clunk" ocassionally when I put the car in reverse, I read somewhere that's a sign of a worn clutch, no strange noises when driving in reverse though. I sure hope I can get a viggen clutch in black, that would be great!! Rear main seal huh... I'll check into that.
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Old 01-08-2008, 06:11 PM   #7
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Its like 15 bucks and the seal is right there with the flywheel off. Might help you to avoid having to drop the trans in the future if it decides to start leaking.
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Old 01-08-2008, 07:47 PM   #8
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so...

I have just started getting a little "clunk" sometimes when putting in reverse, and I have just noticed that hum you may be refering too. Is it when you put the pedal down at 50mph and you here a new, semi-high pitched hum (not the turbo)

oh and 3rd gear syncros are, well, bad. Little bit oh clunk if i slam her.

New clutch and / or trans in my future?
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Old 01-08-2008, 07:50 PM   #9
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The hum is the syncrhos you hear normally as you put the car into the next gear while moving as they try and match the input and output shafts to each others. If your hearing a whine while moving its gear whine.



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Old 01-08-2008, 08:00 PM   #10
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gear whine is bad? like nearing death bad?
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Old 01-08-2008, 08:01 PM   #11
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Not neccesarily. Just a mechanical noise. May help if you do a fluid change.



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Old 01-09-2008, 01:28 PM   #12
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ok, I was a little worried as I never had the sound before, it popped up about a month ago.

any how to's on a trany fluid change/flush? I did a quick search and came up empty.
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Old 01-09-2008, 02:09 PM   #13
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Quote:
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Thanks for all the advise, guys. I only get the "clunk" ocassionally when I put the car in reverse, I read somewhere that's a sign of a worn clutch, no strange noises when driving in reverse though. I sure hope I can get a viggen clutch in black, that would be great!! Rear main seal huh... I'll check into that.
If you want to confirm how bad you're clutch is or if its bad at all, put the car in third gear while the car is stopped, put the E-brake on and give it a little gas and let the clutch out. If it kills the car immediately, the clutch is fine, if it slips a little and then kills the engine, the clutch is starting to go out and if it does not kill the car at all, the clutch is slipping pretty good...

John
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Old 01-17-2008, 01:26 PM   #14
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Spec cluch's are junk... (well mayb just the stage 2 is, stage 3+ is holding out so far)
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Old 01-17-2008, 01:42 PM   #15
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There are quite a few people out there who have had no troubles with spec clutches, so that might be a *bit* of an over-generalization.

Mine has been holding up to the abuse I dish at it just fine

That's like saying saab CV joints are junk just because I've had one fail in the past...
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Old 01-17-2008, 01:47 PM   #16
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There are quite a few people out there who have had no troubles with spec clutches, so that might be a *bit* of an over-generalization.

Mine has been holding up to the abuse I dish at it just fine

That's like saying saab CV joints are junk just because I've had one fail in the past...
this is my 2nd clutch and i know of another menber who did the same thing with a stage 3 tune.
ok, they may not be junk but after 5000 miles... you shouldnt spin the hub out of 3 of them, 2 in my car and another members car.
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Old 01-17-2008, 01:48 PM   #17
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Mine did the same thing as jonny's about 6 months before him. I would go viggen clutch unless you plan on going all out. Mike Saunders has the vig clutch and what 350ish HP.
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Old 01-17-2008, 01:53 PM   #18
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Hmmm. I hove I don't have the same results!

The VW/Audi community uses them pretty widely, and there are quite a few saab folks using Spec disks with viggen PPs, you two are the first I have heard of having this happen! Not to sound rude, but for my sake I would hope this is a fluke

Sorry to assume that it was an over-generalization. Did Spec stand by their product for you?

I don't do a lot of clutch dumps (read, I'm not a fan of burning up tires of blowing transmissions for the sake of a smoke show) so I would hope that I don't end up in the same boat.
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Old 01-17-2008, 01:56 PM   #19
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spec sent me another for 150 shipped same as jonny, not bad, but they claimed to both of us that they had never heard of it happening. That may be legit to one of us, but impossible for both.

I think that there was a bad batch and i wouldnt be the least bit surpised if a few more went out the same way. I may be wrong in associating the "spec hum" to the hub blowing out, but for about 5 miles before my hub blew out that hum got noticably louder. Then my car stopped moving. my .02
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Old 01-17-2008, 01:58 PM   #20
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I have seen a member clutch where the springs popped out too.
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