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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 10-23-2007, 01:41 PM   #1
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Viggen Transmission Rebuild/Update with Quaife LSD

So I bought a new 99 Blue Viggen but I have the old transmission that I’m rebuilding. I bought a quaife LSD for my 9-3SS when they had the sale.

I have the engine and Transmission out from the wreaked Viggen, and currently the transmission is getting redone. The Quafie LSD is right here and I was wondering if anybody has ever done a rebuild with LSD on the Viggen tranny. I have the WIS and EPC and some experience rebuilding a 9k transmission with my dad so with all of that I’m not to worried about the install or rebuild.

I want to make this transmission last though, what are some upgrades that I can do to the internals besides just replacing all the worn parts to make this thing stronger then it is.
know cryo treated or shot peening, but I was thinking more of changing out gears or various parts that are known to break. Maybe Nick can chime in with some good ideas or what he did to his tranny to withstand an increase of HP. I’m not going for anything serious, the engine is fully rebuilt JE pistons and aero rods so I figure I will just max out the engine. Over 400whp it should not be that hard to accomplish with everything that I already have.

So if anybody has any ideas or input that would be awesome I want to start the teardown tonight.

Last edited by snow4_1man; 10-23-2007 at 02:03 PM.
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Old 10-23-2007, 01:47 PM   #2
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know cryo treated
I believe this will help with the durability of your lower gears, esp if you want to do any launching, and it's not that expensive to do either...
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Old 10-23-2007, 01:48 PM   #3
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I believe this will help with the durability of your lower gears, esp if you want to do any launching, and it's not that expensive to do either...
I have been interested in doing this to the verts tranny.
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Old 10-23-2007, 01:50 PM   #4
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I have been interested in doing this to the verts tranny.
Have any of the c900 guys tried this? it seems like a no brainer to me...
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Old 10-23-2007, 01:54 PM   #5
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not sure about the viggen, but the weakpoints in the c900 transmission are the pinions, diff cover, and reverse fork. I think the gears are generally good for whatever power is put to them.

the cryotreating sounds like a good idea though, do the tolerances stay the same after the gears are treated?
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Old 10-23-2007, 02:04 PM   #6
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not sure about the viggen, but the weakpoints in the c900 transmission are the pinions, diff cover, and reverse fork. I think the gears are generally good for whatever power is put to them.

the cryotreating sounds like a good idea though, do the tolerances stay the same after the gears are treated?
If i had a c900, I'd probably cryo treat every part of the tranny, people talk about breaking casings, shearing gears etc...
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Old 10-23-2007, 02:16 PM   #7
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I believe Gary Moore (GM) did something special to his C900 box besides the oil cooler, hopefully he sees this.
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Old 10-23-2007, 02:21 PM   #8
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Ok lets lean away from the c900 as this is for a Viggen. We all know the weak points of that tranny and what to do ect.
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Old 10-23-2007, 02:21 PM   #9
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Quote:
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I believe Gary Moore (GM) did something special to his C900 box besides the oil cooler, hopefully he sees this.
his was built by Scan West.
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Old 10-23-2007, 02:24 PM   #10
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There is a factory update kit that is supposed to improve some things. I would go ahead and throw that in while you are there. I plan to do that when my time comes. Nick has info somewhere on his site, or just give him a call to get the part number.
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Old 10-23-2007, 02:25 PM   #11
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Originally Posted by Jameson View Post
There is a factory update kit that is supposed to improve some things. I would go ahead and throw that in while you are there. I plan to do that when my time comes. Nick has info somewhere on his site, or just give him a call to get the part number.
Was this just for viggen trannys of for 9-3 trannys? I have a 9-3 tranny in my ng900.
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Old 10-23-2007, 02:28 PM   #12
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Use the new 03- crush sleeve. Set the preload just a bit tighter. It takes quite a few special tools. I guess you could fake it till you get to the setup part.

On my new box I am going to try a couple tricks. Also plan on installing oil fittings for a cooler but before that I will install a temp probe so I can see how bad it gets. It got pretty hot to the point of shifting odd on the track day. Hopefully we get the engine/trans room and new offices finished soon.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 10-23-2007, 02:28 PM   #13
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I wonder if a 6spd can mate up to the 235?
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Old 10-23-2007, 02:31 PM   #14
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Nick was speaking of some newer style crush sleeve used on the 03s and up.

Also he has these pdfs.
http://www.genuinesaab.com/psi/files...ans-update.htm
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Old 10-23-2007, 02:31 PM   #15
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When I did the clutch on my 9-5 Aero, I did a Quaife LSD as well as the factory manual transmission update kit. And 2nd gear got replaced because of some wear and chipping.

x2 on both the factory update kit and the LSD.
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Old 10-23-2007, 02:41 PM   #16
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The different crush sleeves. I have an interesting old style one that is split across the bulge from fatigue.

Bigger pics here : http://genuinesaab.com/gallery/VigTrans
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 10-23-2007, 03:18 PM   #17
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I wonder if a 6spd can mate up to the 235?
Yep it can... there was a guy at the Saab Fest in Trollhättan that put a 9-3SS 6 speed onto his 2002 9-3. He said it was a lot of work, but it all worked out ok. Sorry I don't have much more info about it.... but I will try and dig up some more pics.

Damn sweet car too.

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Old 10-23-2007, 03:19 PM   #18
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Awesome just the type of information that i was looking for. I'm going to order the update kit tonight. Does that kit include the 03 crush sleeve?
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Old 10-23-2007, 03:56 PM   #19
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Yep it can... there was a guy at the Saab Fest in Trollhättan that put a 9-3SS 6 speed onto his 2002 9-3. He said it was a lot of work, but it all worked out ok. Sorry I don't have much more info about it.... but I will try and dig up some more pics.

Damn sweet car too.



seriously please try and find that info!
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Old 10-23-2007, 04:06 PM   #20
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There is a factory update kit that is supposed to improve some things. I would go ahead and throw that in while you are there. I plan to do that when my time comes. Nick has info somewhere on his site, or just give him a call to get the part number.
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Awesome just the type of information that i was looking for. I'm going to order the update kit tonight. Does that kit include the 03 crush sleeve?
the update is a must, it should have the newer sleeve. ( unless it has been sitting a while.) The part numbers are the same IIRC.

INteresting since I had to have seond gear and synchro replcaed too, maybe its a weak spot??
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