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2005 Differential Upgrade

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Old May 15, 2021 | 09:57 PM
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Default 2005 Differential Upgrade

I am looking to upgrade my 05 rear to a 2006 with 3.73 or 3.90 ratio.
I am in NJ and wondering if anyone knows of a shop, or has done themselves. I will also be adding the LG Trans and diff coolers.
Lastly, I have been shopping for the rear and adapter. Looked at RPM, Zip, West Coast, and wondering if anyone has any suggestions regarding ordering the new diff.
Thanks!
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Old May 16, 2021 | 12:16 AM
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You can’t possibly do better than RPM Transmissions. There’s them then everyone else. Give them a call.


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Old May 16, 2021 | 09:41 AM
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Thanks, that is what I have been thinking.
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Old May 16, 2021 | 10:36 AM
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Look up Jared Allen on Facebook he can build whatever you need for much cheaper than rpm’s ridicules prices
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Old May 16, 2021 | 01:09 PM
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Originally Posted by 493lszosix
Look up Jared Allen on Facebook he can build whatever you need for much cheaper than rpm’s ridicules prices
RPM Transmissions built and installed my Z diff and rebuilt the manual trans for what I thought was a good price for what was done. That business is run like rehearsed symphony and cleaner than some kitchens I’ve been in.
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Old May 16, 2021 | 10:07 PM
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RPM! Did mine in 17 it's still tight as hell! Crying once is better than crying all the time
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Old May 17, 2021 | 03:02 PM
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RKT56 is in Frederick Maryland and has done lots of Corvette rears.
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Old May 18, 2021 | 11:10 AM
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Thanks everyone, I appreciate the input.

I just spoke with Rick at RKT for a while, and had a great conversation about this. He explained that my Z51 trans has a 2:97 ratio, and that a base trans has 2:61. He thought that moving to a base trans (rebuilt) and putting 3.73 gears in an upgraded 2006 rear would be a great set up. Thoughts?
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Old May 18, 2021 | 11:41 AM
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Originally Posted by jsbwac
Thanks everyone, I appreciate the input.

I just spoke with Rick at RKT for a while, and had a great conversation about this. He explained that my Z51 trans has a 2:97 ratio, and that a base trans has 2:61. He thought that moving to a base trans (rebuilt) and putting 3.73 gears in an upgraded 2006 rear would be a great set up. Thoughts?
he the man, will not go anywhere else.
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Old May 18, 2021 | 12:52 PM
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Originally Posted by jsbwac
I am looking to upgrade my 05 rear to a 2006 with 3.73 or 3.90 ratio.
I am in NJ and wondering if anyone knows of a shop, or has done themselves. I will also be adding the LG Trans and diff coolers.
Lastly, I have been shopping for the rear and adapter. Looked at RPM, Zip, West Coast, and wondering if anyone has any suggestions regarding ordering the new diff.
Thanks!
I must have missed it.....is this a A4 or M6 trans?
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Old May 18, 2021 | 01:13 PM
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Originally Posted by grpweld
I must have missed it.....is this a A4 or M6 trans?
op has z51 trans which has m12 gearing
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