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C5 Differential On C6 Adapter Bracket?

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Old Nov 1, 2019 | 10:19 PM
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Default C5 Differential On C6 Adapter Bracket?

Where can you find a good adapter bracket to mount a C5 differential on a C6?
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Old Nov 4, 2019 | 10:57 AM
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Do most of you just make your own bracket then? The only articles I can find on guys doing this are almost ten years old.
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Old Nov 5, 2019 | 08:04 AM
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Check with this vender

http://www.rpmtransmissions.com
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Old Nov 17, 2019 | 11:49 PM
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Originally Posted by jim2092
Check with this vender
Jim, thanks but I do not believe they sell them.

Last edited by lstoys; Nov 17, 2019 at 11:54 PM.
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Old Nov 17, 2019 | 11:53 PM
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I just saw a video uploaded October 2019 where these guys were installing a C5 dif on a C6 and said they had just bought the adapter plates that fit into the crossmember triangles, but they didn't say where - so somebody is making these. If anyone knows where to get a set please let me know, thanks.
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Old Nov 18, 2019 | 12:06 PM
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Originally Posted by jim2092
Check with this vender

http://www.rpmtransmissions.com
I've had good results with RPM.

http://www.rktperformance.com/?welcome-from-cf is the other vendor which can help.
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Old Nov 18, 2019 | 01:21 PM
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Originally Posted by 93Polo
I've had good results with RPM.

http://www.rktperformance.com/?welcome-from-cf is the other vendor which can help.
Thanks, I'll look at contacting these guys and see.
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Old Nov 18, 2019 | 01:22 PM
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When I look at older posts there seems to be a few different styles of brackets too.

One person complained of a lot of vibration using one of the adapter styles, not sure which one; if anyone has experience with these would be curious to know if you ran into vibration or issues.

Last edited by lstoys; Nov 18, 2019 at 01:25 PM.
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Old Nov 18, 2019 | 05:21 PM
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Okay, so for the record neither RPM or RKT sell the adapter, but it was worth a shot so thanks for the ideas.
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Old Nov 19, 2019 | 11:45 AM
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The adapter kits that I've seen pictures of basically fit plates into the triangles holes of the crossmember, you could probably just make yourself or cut templates and have them made; the rubber bushing in-between the crossmember and differential appears to be the only hard part?

Last edited by lstoys; Nov 20, 2019 at 04:49 PM.
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Old Nov 19, 2019 | 06:01 PM
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I assume you're trying to save money but replacing with a RPM built C6 Z diff is what I did years ago.
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Old Nov 19, 2019 | 10:42 PM
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I'm pretty sure those 2 outer holes on the top plate bolt right to the diff eliminating the factory C5 mount. That assembly bolted down with the bolt going through both plates with the bottom plate against the cradle certainly doesn't properly create a bushed mount.

The C5 mount might be too tall to fit in there. Otherwise, I'd wonder if you could use it somehow possibly with some plates filling in the holes.
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Old Nov 20, 2019 | 10:06 AM
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I wouldn't trust that mount to attach the diff. It is attaching to a point that wasn't designed to carry the load. Further the diffs tend to move around under load and aftermarket mounts try to limit the movement of the diff. The adapter in the video uses a single bolt on the subframe side.

I'd look for a C6 diff.

Last edited by 93Polo; Nov 20, 2019 at 10:07 AM.
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