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Discussion Starter #1
I'm looking at 2 V's this weekend. 04 & 06. Is the 2006 rear diff any better than the 2004 ? I know the LS2 is nicer than the LS6, but I'm more concerned about the rear diff, as I will tracking the car, rather hard. Auto-x, Road course, maybe a drag strip or 2.

The 06 is $10K more expensive, but less mileage.
 

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2005 CTS-V
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8,363 Posts
The original differential in a 2006 V is a better dramatically better unit than the original differential in a 2004 V. Many 2004 Vs however, no longer have their original differential and a 2004 V could have the latest differential (released in early 2008 as a replacement part), which is still better than a 2006 original unit.

The 2006 V also has other improvements. I love my LS6, but if I were buying a used V I would look first and the 2006s and 2007s.
 

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2005 CTS-V Black
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172 Posts
not worth $10k more IMO. thatll buy you a 8.8 or 9 conversion with spare change for wheels/tires. keep looking.
 

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2004 CTS-V, 423 RWHP / 380 RWTQ
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578 Posts
Save the 10k and go with the 04, spend the $10k on aftermarket goodies, you'd be a lot better off with an 8.8 that a factory 2006 diff, you could actually track and drag it with an 8.8, not with a factory diff though.
 

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2006 CTS-V
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The LS2 has a larger displacement which comes in handy under modifications, makes more torque across the powerband stock, revs to the same RPM as the LS6, and generally puts down more usable power on the dyno.

However, I'll have to agree... for 10k more, you can get an 8.8 setup and be solid in comparison to the '06, then you can save the remainder for a cam setup and assist that tiny feeble infantile 5.7 liter into making real world power.

[edit]
I'm sorry gentlemen, figured I'd start this one up.
 

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The LS2 has a larger displacement which comes in handy under modifications, makes more torque across the powerband stock, revs to the same RPM as the LS6, and generally puts down more usable power on the dyno.

However, I'll have to agree... for 10k more, you can get an 8.8 setup and be solid in comparison to the '06, then you can save the remainder for a cam setup and assist that tiny feeble infantile 5.7 liter into making real world power.

[edit]
I'm sorry gentlemen, figured I'd start this one up.
Getting to the same spot does not mean one has the same journey. Silence!
 

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2006 Raven CTS-V
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1,245 Posts
How much mileage difference is there? If they are kind of close, get the cheaper one and spend the extra $10k on mods. If the '06 has a lot less miles (half?), I'd go for the '06.
 

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Discussion Starter #15
The guy with the 06 won't let me drive it. So obviously I won't buy it. He expects me to hand over money, and be happy after LOOKING at the car. Dealing with morons is just beyond impossible.
 

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2004 CTS-V Raven, StainlessWorks header back exhaust
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The guy with the 06 won't let me drive it. So obviously I won't buy it. He expects me to hand over money, and be happy after LOOKING at the car. Dealing with morons is just beyond impossible.
Lol how is someone expected to buy a car without a test drive? I mean OK if you insurance doesn't cover a potential buyer then make a deal like if you have cash in hand you can test drive it and if you don't like it I'll give your cash back and you can leave or something. I had a 17 year old come to test drive my last car and with almost 400whp at the front tires I wouldn't let him just come drive it. Being that he was a noon at driving I was certain he would put my car into a wall
 

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2010 Thunder Gray 6MT
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Not sure how an 06 is worth 10k more than the 04. My 06 can't be worth more than 17k (98k miles)...doubt you can buy the 04 with the same milage for 7k. I would look for a good deal on the 06 myself. Never had a rear diff problem for what its worth.
 

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Platinum 06 CTS-V, kooks, magnaflow
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639 Posts
get an 06. Be prepared to travel. Got my 06 half way across the country. Got the plane ticket for $200 and drove it back for $200 in gas. Was an awesome trip and well worth the travel. Got it for less than what I could find locally in my big city, it's a rare enough car if you see the deal you need you want elsewhere travel out with cash or a bank check and scoop it up.
 

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'06 DTS performance; CowboyCadillac='12 SVT Raptor; 2014 XTS-Vsport
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634 Posts
:coffee:There are four different part numbers for the differential of a V1.
1st --- 10361308 in '04
2nd--- 10368780 in '04 & '05
3rd--- 15793756 installed in '06 & '07.
4th--- 25873498 was released in 2008 for a slight improvement over 15793756

None of these rears are suitable for repetitive Drag Racing due to the Design, ie., aluminum case, support structure.

:yup: G-force axles are advisable or equivalent.

:yup: Find out what the diff part # is on the '04 :suspense: '06
 
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