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

best rear end fix for gen 1 v's???

Old 06-25-2012, 11:30 AM
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9" is best solution.


Who in their right mind buys a V if they are going to beat on it?
Old 06-25-2012, 11:51 AM
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CS has the 8.8 kit on sale for right about 4k seems like a decent deal if you don't know much about it rebuilding a 8.8, like myself, and want a solid bolt in solution.
Old 06-25-2012, 12:26 PM
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A brand new differential (2nd version) from the dealership runs about $2k. If my 2004 goes out on me, that will be my approach. True this fix won't be the strength of the $5k solutions but I don't beat on my car, drag it or gun it in 1st any so I'm not uber concerned about it.


http://www.tonkinonlineparts.com/p/g.../25873498.html

Last edited by etcts-v; 06-25-2012 at 02:27 PM.
Old 06-25-2012, 02:26 PM
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What is the difference between my diff and the latest diffs?
Old 06-25-2012, 02:34 PM
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Correction, I meant the 4th generation:

1st - 10361308
2nd- 10368780
3rd- 15793756 installed in '06 & '07.
4th- 25873498 released in 2008

Both the 1st and the 2nd are considered inferior to the 3rd and 4th, I couldn't tell you specifics on why.
Old 06-25-2012, 04:19 PM
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That girdle looks a lot like the T/A girdle I have.
Old 06-25-2012, 10:17 PM
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Originally Posted by 9t8z28
That girdle looks a lot like the T/A girdle I have.
Yes, I've seen that one. They are similar in principle. I have this programmed on the CNC plasma cutter so I could easily tweak the design & make some more in the future.
Old 06-25-2012, 11:48 PM
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That was my concern. If the stock one goes south I don't want to spend time and money to put on the latest P.O.S. only to have it go out too in a few months. Although the 8.8 is a little pricey I think if I hang on to the car I am going to go that route.
Old 06-26-2012, 12:11 AM
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There is no cheap reliable rear and I doubt there will ever be. Honestly even with an 8.8 or 9" i wouldnt have high hopes that even that would take the abuse of serious HP if anyone besides very few ever went north of 600rwhp.
Old 06-26-2012, 10:30 AM
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I know that 4th gens are known to whine but how many of those whines have really turned to blown?
Old 06-26-2012, 11:39 AM
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Originally Posted by TheLostDriver
I know that 4th gens are known to whine but how many of those whines have really turned to blown?
Read the third sticky from the top.

I would venture to guess a lot of diffs have blown and it's unfortunate how easy it is to blow one up. That's why I tell everyone that the V is a touring car, don't buy one if you want to drag race or beat on it.
Old 06-26-2012, 10:21 PM
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IMO complete V2 rear subframe. prices should start dropping soon.
Old 06-27-2012, 09:40 AM
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Originally Posted by yooperLS6
IMO complete V2 rear subframe. prices should start dropping soon.
Woah, it bolts in?!
Old 06-27-2012, 12:24 PM
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^this
Old 06-27-2012, 03:24 PM
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I love reading all these rear end threads... Granted, its not the best or strongest design, but its not as weak as people think IMO.. I've owned my v for 2.5 yrs. now. I've replaced the motor, tranny, and just did the drive shaft for the center coupler. The rear is still goin! I've been to the drag strip, and done SEVERAL 1-2, 3-4 power shifts, and plenty of rolling 1st gear burnouts. I don't have major power either, just bolt ons.

I bought my car because i wanted a fast n fun ride with 4 doors. I drive it like i stole it everyday!!!! Lol

its an 06 wit 93000 btw.
Old 06-27-2012, 03:34 PM
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Originally Posted by D Block
I love reading all these rear end threads... Granted, its not the best or strongest design, but its not as weak as people think IMO.. I've owned my v for 2.5 yrs. now.
Do you know if you have revision 3 or 4 diff?

Around 60% of the V1's made could have weaker differentials than yours, assuming yours wasn't replaced before you bought the car. I also think some small revisions were done to help combat wheel hop on the '06-07 cars. Those of us with '04-05's can get into wheel hop pretty easy and that's what kills the diffs quickly.
Old 06-27-2012, 03:42 PM
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Originally Posted by 1BADCTS
Yes, I've seen that one. They are similar in principle. I have this programmed on the CNC plasma cutter so I could easily tweak the design & make some more in the future.
Any interest in making me one?
Old 06-27-2012, 03:52 PM
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Originally Posted by 9t8z28
Any interest in making me one?
I wonder if these guys could handle it?
http://www.emachineshop.com/
Old 06-27-2012, 06:43 PM
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Originally Posted by 9t8z28
Any interest in making me one?
Of course!

Let me get it on my car to validate exhaust clearance... or I'm working with another local guy who may bring his car by and we'll put one on his. I'll let you know!



Back to the topic of the thread, for an 'all out' drag setup I would do a 9" or the CS 8.8. I have several CS products on my car and they meet all of my expectations!

For a budget build, buy a 4th gen diff cheap ($300) from an SRX or several other cars (just be sure to match the 3.73 gear ratio), swap out your posi carrier (5 minute job) and never look back. You can do reinforcment like the CS bushings, poly diff block, or a girdle and you're probably OK for a good long while!

-Mark
Old 06-27-2012, 07:21 PM
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Originally Posted by 1BADCTS
Of course!

For a budget build, buy a 4th gen diff cheap ($300) from an SRX or several other cars (just be sure to match the 3.73 gear ratio), swap out your posi carrier (5 minute job) and never look back. You can do reinforcment like the CS bushings, poly diff block, or a girdle and you're probably OK for a good long while!

-Mark
I like this option!

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