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9 Bolt Borg Warner
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Tue Feb 01, 2011 9:11 pm    Post subject: Reply with quote

This guy took the prop valve out from under his hood to sell it with the axle? Isn't he nice. Razz

Mike sold me his brakes as well, yes. When he says "not PBR" he means that it has the older cast-iron calipers on it.
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Tue Feb 01, 2011 9:16 pm    Post subject: Reply with quote

So you're gettin exactly what I'm getting for $150 cheaper?! WTF?!
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Tue Feb 01, 2011 9:18 pm    Post subject: Reply with quote

Like I said, offer the guy $250 for the 3.27.

*Edit: Might take a look at this one. Have to see how bad the gears look.

http://seattle.craigslist.org/kit/pts/2189064945.html
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nonsensekid20
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Joined: 30 Sep 2010
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1991 Chevrolet Camaro RS

PostPosted: Tue Feb 01, 2011 9:23 pm    Post subject: Reply with quote

Pitting? does that mean the gears are wearing out?
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Alphius
Peanut


Joined: 05 Sep 2006
Posts: 2429
Location: Grand Mound

1984 Chevrolet Camaro Z/28

PostPosted: Tue Feb 01, 2011 9:32 pm    Post subject: Reply with quote

It means there are small pits on the surface of the gears. I was thinking of calling that guy up as well, but haven't gotten around to it yet.
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84 Camaro Z28 - LS1/T56
85 Silverado - Low and Slow
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Wed Feb 02, 2011 8:32 am    Post subject: Reply with quote

What's better for street? 3.27 or 3.40?
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blue89
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Joined: 23 May 2006
Posts: 3482
Location: Bellingham/Eugene

1986 Chevrolet Camaro RS

PostPosted: Wed Feb 02, 2011 8:48 am    Post subject: Reply with quote

I would go with the 3.40. Either would work though.
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Wed Feb 02, 2011 10:30 am    Post subject: Reply with quote

Which one will roast the tires better? Laughing
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Twilightoptics
Hardcore (12sec Club)


Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Wed Feb 02, 2011 10:40 am    Post subject: Reply with quote

No 3.40 for a 9bolt. Thought it was 3.27 or 3.70 in 3series....
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Wed Feb 02, 2011 10:49 am    Post subject: Reply with quote

The one on craigslist said it was 3.40
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Schultzy89GTA
M.R.A. (11sec Club)


Joined: 08 Jan 2004
Posts: 4415
Location: Gresham, OR

1989 Pontiac GTA

PostPosted: Wed Feb 02, 2011 12:13 pm    Post subject: Reply with quote

Likely it is a 3.45. Factory ratio's for 3 series carriers in the 9 bolt were 3.27, 3.45 and 3.70.

3.45 was common in 5 speed LB9 cars. My '88 had one. Auto LB9 and L98 cars typically had the 3.27.

-Schultzy
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Twilightoptics
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Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Wed Feb 02, 2011 1:41 pm    Post subject: Reply with quote

Never heard of the 3.45 ratio!

Smile

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nonsensekid20
Member


Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Wed Feb 02, 2011 3:49 pm    Post subject: Reply with quote

Well my car ended up with the stupid open diff. Mad

Soon to be 9 bolt posi. lol
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redlava
Member


Joined: 02 Feb 2007
Posts: 448
Location: Bremerton

1986 Chevrolet Camaro Z/28

PostPosted: Wed Feb 02, 2011 4:59 pm    Post subject: Reply with quote

That is my 3.70, 9 bolt that is for sale on craigslist. I took a picture of the pitting when I first picked it up and posted it in this thread.

http://cascadecrew.org/phpBB2/viewtopic.php?t=7756&highlight=
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aaron_sK
Member


Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Wed Feb 02, 2011 7:01 pm    Post subject: Reply with quote

Twilightoptics wrote:
Never heard of the 3.45 ratio!

Smile


BW actually made quite a few ratios for those axles:

http://www.9bolt.com/gearsets.html

Mostly you see 3.70 and 3.27 though.
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