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1 rib vs. 3 rib diff cases, year/model dependant...........

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Old Mar 14, 2009 | 08:11 PM
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Default 1 rib vs. 3 rib diff cases, year/model dependant...........

1. 2002 up, ALL C5 regardless of ratio have 3 rib diff case

2. 2001 Z06 ALL have 3 rib diff case

I am not 100% on this info, but believe it to be correct.

Feel free to post up experience backing or negating the above statement, thanks

Frequently asked question whenever dealing w/ diffs

SEE POST #3, I asked RPM a few weeks ago this question, forgot a detail

Last edited by SteveDoten; Mar 15, 2009 at 12:43 PM.
Old Mar 14, 2009 | 10:43 PM
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I have 2004 coupe and it came with the 3 rib diff housing.
Old Mar 15, 2009 | 12:09 AM
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Originally Posted by Steve Doten
1. 2002 up, ALL C5 regardless of ratio have 3 rib diff case

2. Some 2001 C5's have a 3 rib diff case or 1 rib diff case (including Z06's)

I am not 100% on this info, but believe it to be correct.

Feel free to post up experience backing or negating the above statement, thanks

Frequently asked question whenever dealing w/ diffs
Fixed
Old Mar 15, 2009 | 12:12 AM
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Anyone know if the 3-ribs or 1-rib is the only difference in them? Im guessing so....Meaning, is there anything different, that you can t see that is different between the two?
Is 1-rib with a DTE brace as strong/stronger than a 3-rib? I know alot of guys run a 3-rib w/out a brace and do it successfully.
Old Mar 15, 2009 | 08:20 AM
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I believe the case casting is the only difference - nothing internal that I know of. Your question is a tough one...since there will be a debate on whether the brace really does anything or not. Most just submit to..."it can't hurt" and "it is good insurance".

Too many variables and opinions to give a real answer!

Last edited by vsocks1; Mar 15, 2009 at 09:45 AM.
Old Mar 15, 2009 | 08:52 AM
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If you look at how the brace works, it has to help. The three rib should always be stronger irregardless since it is simply a stronger design. That said, if you race the car and are dropping the clutch with sticky tires, I think you are living on borrowed time with either case and no brace installed.
Old Mar 15, 2009 | 09:14 AM
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Originally Posted by vettenuts
If you look at how the brace works, it has to help. The three rib should always be stronger irregardless since it is simply a stronger design. That said, if you race the car and are dropping the clutch with sticky tires, I think you are living on borrowed time with either case and no brace installed.
I totally agree! I installed one, thinking "it can t hurt", and it looks like it "braces" together the parts that seem to come apart in the pics i ve seen of exploded diffs. The part i would like to know for sure is just how much the 2 "extra" ribs help. I ve read of alot of guys with multiple hard leaves(with sticky tires) and a 1 rib diff w/o brace. I agree with the "borrowed time" statement!
Old Jul 1, 2009 | 03:53 AM
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Originally Posted by Steve Doten
1. 2002 up, ALL C5 regardless of ratio have 3 rib diff case

2. 2001 Z06 ALL have 3 rib diff case

I am not 100% on this info, but believe it to be correct.

Feel free to post up experience backing or negating the above statement, thanks

Frequently asked question whenever dealing w/ diffs

SEE POST #3, I asked RPM a few weeks ago this question, forgot a detail
So the FRCs all have the single rib?

Can anyone post a picture of the difference between the 2?
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Old Jul 1, 2009 | 11:06 AM
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Originally Posted by intoc6s
I ve read of alot of guys with multiple hard leaves(with sticky tires) and a 1 rib diff w/o brace. I agree with the "borrowed time" statement!
I'm one of them. Probably 150+ 1.5x launches on slicks w/ 4.10s and 400+rwhp on a single rib and no failure. I'm doing better than all my 3 rib braced friends who broke their rears. If I'm on borrowed time I'm sure borrowig a lot of it.
Old Jul 1, 2009 | 11:39 AM
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Originally Posted by Spectre86
So the FRCs all have the single rib?

Can anyone post a picture of the difference between the 2?
Here is picture of the two cases side by side that was posted by lucky131969.
Old Jul 1, 2009 | 12:53 PM
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Originally Posted by AllVette
Here is picture of the two cases side by side that was posted by lucky131969.
pwned by work filter....
Old Jul 1, 2009 | 02:05 PM
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My 01 Z06 has a 3 rib case, i guess iam lucky.
Old Jul 1, 2009 | 04:36 PM
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My 99 came with the 1-Rib. I've since upgraded it to an RPM Transmissions Level 3 3.43 with 3 ribs. I also added the Phadt differential brace:


Old Jul 1, 2009 | 07:30 PM
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Originally Posted by sami85L98
My 01 Z06 has a 3 rib case, i guess iam lucky.
My 01 Z51 Vert also has the three rib case.
Old May 19, 2011 | 09:58 AM
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Digging up old thread...so according to this thread my 2002 coupe with 2.73's has a 3 rib?
Old May 19, 2011 | 11:39 AM
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Originally Posted by STL94LT1
My 01 Z51 Vert also has the three rib case.
http://forums.corvetteforum.com/foru...s-or-more.html

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