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

V2 to V1 Rear Subframe Swap

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Old 02-06-2017, 02:27 AM
  #121  
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Someone has pics with side by side comparison from the inlet flanges or measures them?

I have here actual a V1 lying for measurement and can help with lathe or cnc milling for a adapter or a create a new flange...

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Ronald
Old 02-06-2017, 12:58 PM
  #122  
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Originally Posted by voodoochikin04
Can the pinion flange from a V1 diff go onto a v2 diff?
I have a spare V1 diff but need to get some sockets so I can pull both of them off. This would be a good solutiin, as there are plenty of bad v1 diff out there, If not already scrapped.

The hole pattern for the actual fasteners is off about half a hole. I measured
V1 is 100mm with (3.375")~86mm pcd
V2 is 108mm with (3.700")~94mm pcd
Old 02-06-2017, 04:05 PM
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Originally Posted by hefftone
I have a spare V1 diff but need to get some sockets so I can pull both of them off. This would be a good solutiin, as there are plenty of bad v1 diff out there, If not already scrapped.

The hole pattern for the actual fasteners is off about half a hole. I measured
V1 is 100mm with (3.375")~86mm pcd
V2 is 108mm with (3.700")~94mm pcd
As another way of looking at it, how about putting the front of a v1 driveshaft onto a v2 driveshaft...
Old 02-06-2017, 04:45 PM
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Originally Posted by ls1247
As another way of looking at it, how about putting the front of a v1 driveshaft onto a v2 driveshaft...
Yeah you could but ($,shipping,another rare V2 part,potential downtime)..I think it'd be much more optimal to find a Porsche 930 style CV to use. But the center splines are different, so that's another change, but probably not insurmountable.
Old 02-07-2017, 06:18 AM
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That's not possible with out cutting, welding and balancing. The designs are so different. The V2 uses a ujoint in the center, with splined end of rear shaft going rear to front... The V1 is no yolk, splines on front half going into rear... Just not gonna happen.
Old 04-01-2018, 03:35 PM
  #126  
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Hi all, Does anyone have any updates on this swap? OP have any updates?
Old 04-01-2018, 09:11 PM
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Originally Posted by voodoochikin04
That's not possible with out cutting, welding and balancing. The designs are so different. The V2 uses a ujoint in the center, with splined end of rear shaft going rear to front... The V1 is no yolk, splines on front half going into rear... Just not gonna happen.
the only other option would be a custom made driveshaft...what’s the difference in custom making one from scratch or making a hybrid shaft out of the V1/V2 pieces...

why bother? The v2 has a beefier bearing mount assembly and iirc, it had the same bolt pattern as the v1 part. And my experience with a one piece in this application hasn’t been perfect so a hybrid shaft makes sense to me...it can be built but you’d know more about how hard that would be than I would

something like this would make this a bolt in swap.

i was going to do this but when I bought my bone stock, well maintained 06, it drove to good to mess with...there’s a lot of pics on a thread I started about a v2 6060 swap.
Old 05-03-2018, 09:36 PM
  #128  
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A few more v2 assed V1s rolling. Several more in the works.
Old 05-04-2018, 01:05 AM
  #129  
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This is what the first gen V forum became??? Sack up kids
Old 05-06-2018, 10:54 AM
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Any more details/links on this swap? Especially the driveshaft solutions people came up with...
Old 05-27-2018, 03:04 PM
  #131  
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Originally Posted by jmilz28
Any more details/links on this swap? Especially the driveshaft solutions people came up with...
Most people have used an aftermarket driveshaft.
1 person designed a flange adapter to bolt the Stock Driveshaft to the V2 flange A company is supposed to be producing them.....still waiting.
1 person swapped the V1 flange into the v2 diff and sent it. Seems it would be at the limit, but I have not heard of the CVs dieing.
Old 05-28-2018, 01:28 PM
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Originally Posted by hefftone
1 person designed a flange adapter to bolt the Stock Driveshaft to the V2 flange A company is supposed to be producing them.....
So what I'm taking away from this is that the V2 pinion flange sits further back in the car than the V1 flange and all you really need to make this swap work is a driveshaft spacer/adapter to make up the difference?
Old 05-29-2018, 02:14 PM
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I know I'd love to have a V2 shaft with adapter rather than the V1 shaft as a base, if I had a choice. I doubt either has a capacity issue, just one is easier to service and find replacements for than the other.
Old 05-31-2018, 05:37 AM
  #134  
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Originally Posted by ls1247
So what I'm taking away from this is that the V2 pinion flange sits further back in the car than the V1 flange and all you really need to make this swap work is a driveshaft spacer/adapter to make up the difference?
yes, but it's actually a pretty thin adapter, only about 1/2" thick. it's a bit more complicated than it sounds, clearances, tapped holes, counter bored holes. The one guy running the swapped V1 flange only has around 500 miles on his, so tough to say how that would work in the long term.

Originally Posted by jmilz28
I know I'd love to have a V2 shaft with adapter rather than the V1 shaft as a base, if I had a choice. I doubt either has a capacity issue, just one is easier to service and find replacements for than the other.
The V1 shaft is rather serviceable now. With the voodoo bearing, and now knowing BMW D/S CVs are practically identical.... Why go through the bother.
Old 05-31-2018, 07:05 AM
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Swapping the CVs requires a rebalance, if I understand correctly. It's damn near impossible to find anyone to balance our shafts without rebuilding the whole thing...even then results are iffy. The V2 shafts are doable by most any driveshaft shop because they have the U-joints instead of the 6 hole CVs.
Old 06-04-2018, 09:06 PM
  #136  
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Originally Posted by jmilz28
Swapping the CVs requires a rebalance, if I understand correctly. It's damn near impossible to find anyone to balance our shafts without rebuilding the whole thing...even then results are iffy. The V2 shafts are doable by most any driveshaft shop because they have the U-joints instead of the 6 hole CVs.
V2s definitely have a CV joint bolting to the pinion flange.
BMWs do too, and they have dozens of replacements available.
Old 06-05-2018, 08:32 AM
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Yeah, the BMW 7-series E65 uses the same rear cv-joint we have, but in the middle a u-joint, way better solution here, then ours with double cv-joints...

Greetz
Ron
Old 10-01-2018, 01:28 PM
  #138  
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anybody know who used the stock driveshaft and used the V1 pinion flange? How is it doing with more miles? Ready to pull trigger and do this swap.
Old 10-02-2018, 08:13 PM
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Originally Posted by Cmycaddyfly
anybody know who used the stock driveshaft and used the V1 pinion flange? How is it doing with more miles? Ready to pull trigger and do this swap.

My understanding is the car is down (for some other reason) and has only done around 400-500 miles for street tuning....but has withstood some pulls (LSA supercharged as well).
Old 12-29-2018, 01:37 PM
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Originally Posted by hefftone
My understanding is the car is down (for some other reason) and has only done around 400-500 miles for street tuning....but has withstood some pulls (LSA supercharged as well).
Bumping this up. The driveshaft seems like the only real “if” here. Who’s come up with an easy solution?


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