Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Differential?

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Old 07-06-2010, 09:28 PM
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Default Differential?

What year differential is this?
Please look at the picture.
Attached Thumbnails Differential?-img_5209.jpeg  
Old 07-06-2010, 09:56 PM
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Not sure by the number, but we can easily tell with a picture of the top of the case.
Old 07-06-2010, 10:14 PM
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I'm pretty sure that's the part number for a ~2005 differential.
Old 07-07-2010, 03:54 PM
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Sorry about the HiJack, but I just bought an '05 V w/ 1,380 miles.

I'm assuming it still has the stock differential, but are there any markings on it (and where are they?) that would tell me?


Thanks.
Old 07-07-2010, 05:12 PM
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Originally Posted by mhhamrhead
Sorry about the HiJack, but I just bought an '05 V w/ 1,380 miles.

I'm assuming it still has the stock differential, but are there any markings on it (and where are they?) that would tell me?


Thanks.
The sticker is on the top of the diff.
I found this picture on ebay so you can see the sticker.
Attached Thumbnails Differential?-440-01416-01.jpg  
Old 07-07-2010, 08:46 PM
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There are four different part numbers for a V1.
1st --- 10361308
2nd--- 10368780
3rd--- 15793756 installed in '06 & '07.
4th--- 25873498 was released in 2008 for a slight improvement over 15793756 which was installed in the '06 &'07.
Most '04 & '05 have the 2nd part number. Both the 1st and the 2nd are considered inferior to the 3rd and especially the 4th.

Last edited by Stepside; 10-05-2011 at 08:57 PM. Reason: more info/ corrected part number for 2nd
Old 07-07-2010, 08:50 PM
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yeah you can tell by the fins that it is 06/07.
Old 07-08-2010, 04:36 PM
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Originally Posted by Stepside
There are four different part numbers for a V1.
1st --- 10361308
2nd--- 12378261
3rd--- 15793756 installed in '06 & '07.
4th--- 25873498 was released in 2008 for a slight improvement over 15793756 which was installed in the '06 &'07.
Most '04 & '05 have the 2nd part number. Both the 1st and the 2nd are considered inferior to the 3rd and especially the 4th.
Good Info - Thanks! I fear I most likely have either #1 or #2.


Even though I have no intentions of racing, burnouts, or generally beating on the car (well, maybe the occasional burnout), am I still on borrowed time with #1 or #2?

Are the diffs really that weak, or is it the wheelhop that eventually destroys them?

Vipers suffer from serious wheelhop and I've seen it destroy halfshafts/diffs/transmissions/motor mounts on those cars, so I avoid it on my Viper(Aftermarket Polyurethane engine mounts seem to have reduced much of the wheelhop) and have yet to break any driveline parts. I'm hoping to have the same experience with this car.

Could somebody please tell me where to go find parts for this car that will reduce/eliminate hop? (link for those Creative Steel mounts?) Thanks.
Old 07-08-2010, 05:13 PM
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Originally Posted by mhhamrhead
Good Info - Thanks! I fear I most likely have either #1 or #2.


Even though I have no intentions of racing, burnouts, or generally beating on the car (well, maybe the occasional burnout), am I still on borrowed time with #1 or #2?

Are the diffs really that weak, or is it the wheelhop that eventually destroys them?

Vipers suffer from serious wheelhop and I've seen it destroy halfshafts/diffs/transmissions/motor mounts on those cars, so I avoid it on my Viper(Aftermarket Polyurethane engine mounts seem to have reduced much of the wheelhop) and have yet to break any driveline parts. I'm hoping to have the same experience with this car.

Could somebody please tell me where to go find parts for this car that will reduce/eliminate hop? (link for those Creative Steel mounts?) Thanks.
Even if you eliminate wheel hop, the gen 1 diffs are still weak.

I broke mine on a 1st to 2nd shift and had no wheelhop.

A good set of axles will eliminate hop and help protect the diff . But no guarantees .
Old 07-09-2010, 12:33 PM
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the pinion brace and pinion bushings have a lot to do with the survival of the 2004 diff.
Old 07-09-2010, 09:06 PM
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Thanks for the help guys and for posting this stone! Ill get a pic of the top of the diff when i get a chance. I thought the numbers on the tag would tell which one it was...
Old 07-11-2010, 08:33 PM
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Originally Posted by JJSimon904
yeah you can tell by the fins that it is 06/07.
Here the picture.
I think it is an 05.
Attached Thumbnails Differential?-img_2156.jpeg  
Old 07-12-2010, 01:08 AM
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yup 04/05...the first one
Old 07-12-2010, 10:16 AM
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That sucks! What is it worth to sell it?

I don't think I'd ever actually replace the one in my car with another 04/05 diff even if it did go out. I'd want the upgraded one.
Old 07-12-2010, 10:30 AM
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Well the regular CTS/SRX diffs are going for $100-$300 on ebay. Yours has stronger gears and LSD so its worth a bit more.
Old 07-12-2010, 10:36 AM
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Originally Posted by JJSimon904
Well the regular CTS/SRX diffs are going for $100-$300 on ebay. Yours has stronger gears and LSD so its worth a bit more.
Ok so maybe $500ish then? Do all the V diffs come with 3.73 gears?
Old 07-12-2010, 12:54 PM
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Originally Posted by NeverSatisfied02
Ok so maybe $500ish then? Do all the V diffs come with 3.73 gears?
3.73 is stock for an V.
Old 07-12-2010, 02:31 PM
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Ok. Thx for the info guys!
Old 07-12-2010, 02:35 PM
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Originally Posted by NeverSatisfied02
That sucks! What is it worth to sell it?

I don't think I'd ever actually replace the one in my car with another 04/05 diff even if it did go out. I'd want the upgraded one.
ive seen them go for around 300 the lowest, maybe 500-600 the highest .

I replaced my Gen 1 diff with another gen 1.
It poped around christamss time and I was just strapped for cash. Couldnt dish out the 1,600. But I do plan on upgrading one day.
Old 07-12-2010, 02:42 PM
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Yeah... Im considering now if it would be smart of me to keep it in the box in the garage where it has been for the past few months incase i break my stock 04 diff that is currently in my car. I wont have the $1600 to upgrade anytime soon with being a student and having my bills to pay. I don't rag on my car for that very reason. lol Mostly just cruise it around to avoid costing myself money.

The extra $500 would be nice though. Maybe ill throw it on craigs and see what luck i have...

The diff came with the car when i bought it. Previous owner bought it knowing the car still had the stock rear in it incase it ever broke but it never did. Still going strong...


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