And there she blows...........
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 30
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From: Mt. Pleasant Michigan
And there she blows...........
I'm talking about my rear diff here. It's an 05 w/ z51 package H/C CAI, full exhaust and 3.9 gears. I did my first burn out and launch after putting about 600 miles and roughly 10 heat cycles and now the gear is whinning like crazy. There are also silver flakes in the fluid. Pretty sure it's safe to say it's done. I obviously need to upgrade. I talked with a RPM and they told me if I upgrade the rear I'm going to need to upgrade the transmission as well. I'm sure with their rear end that is the case, but I don't really understand why that is. Can someone please explain that to me. If I can just upgrade the rear and have it hold around 550-600 hp and not have to spend some serious cash I'd be a happy camper. Right now I'm pushing 433rwhp and 384tq. The reason I'd like it to hold more is cause I'm anticipation future mods. Any advice on this will be great. Thanks
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 30
Likes: 0
From: Mt. Pleasant Michigan
Team Owner
Joined: Nov 2006
Posts: 21,136
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From: Long Island New York
Sorry, Im not smart enough.
Im sure someone here is though.
Le Mans Master
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
The 05 has the weakest rear of all the C6s.
You should look into the reason it broke. Most break do to wheel hop! You need to fix the cause before investing in new parts!
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From: Short Hills, NJ
Le Mans Master
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
Drifting
Joined: Sep 2008
Posts: 1,630
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From: Aiea Hi.
If I could only convince Spin to sell me his, and have another one built....
That way it wouldn't cost me 5k to upgrade/safeguard my diff.
Team Owner
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From: Short Hills, NJ
Cartek Performance Engineering (www.cartek.net) in NJ. 908-317-4496
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
I'm talking about my rear diff here. It's an 05 w/ z51 package H/C CAI, full exhaust and 3.9 gears. I did my first burn out and launch after putting about 600 miles and roughly 10 heat cycles and now the gear is whinning like crazy. There are also silver flakes in the fluid. Pretty sure it's safe to say it's done. I obviously need to upgrade. I talked with a RPM and they told me if I upgrade the rear I'm going to need to upgrade the transmission as well. I'm sure with their rear end that is the case, but I don't really understand why that is. Can someone please explain that to me. If I can just upgrade the rear and have it hold around 550-600 hp and not have to spend some serious cash I'd be a happy camper. Right now I'm pushing 433rwhp and 384tq. The reason I'd like it to hold more is cause I'm anticipation future mods. Any advice on this will be great. Thanks
I blew my 05 rear to smithereens recently after 301 hard drag strip launches. My choices were:
1. upgrade to 06+ rear, this means buying an expensive 06+ core ($2k+ for stock gears, then you need to spend $1300 for 3.90 gears and an upgrade) + a $300 or so 06+ rear trans/diff mount.
2. downgrade to a C5 rear. I picked up a built rear with new gears for $1300 no core. $300 for a Cartek adapter bracket, plus some shop time to weld in a plate to the C6 cradle to support the adapter bracket.
I chose to mount a C5 rear as the cores are so much cheaper if I break one again.
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 30
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From: Mt. Pleasant Michigan
I'm not sure who actually did the gear. All my mods were done by Livernois Motorsports. They don't do gears there in house, they send out, and I didn't think to ask to whom. :o Dumb, I know.... I did give DTE powertrains a call today and talk to a tech guy, recommended the stage 3 rear diff. He also said that I need to upgrade the tailshift, so you guys were right on with that. I Then talked to a lady who gave me price ideas and we were looking at around 4K because I have to buy a new housing. Both individuals at DTE were very helpful and friendly. The lady who gave me the initial quote said she was going to try and find a housing for cheaper and is going to call me back in an hour. I have to find out more specifics here but so far here is where I'm at
DTE- great rear diff for $4000
RPM- both rear end and trans upgrade for $5500
I need to figure out specifically what both of these deals entails, but have any of you had good or bad experiences with these companies?
I Then talked to a lady who gave me price ideas and we were looking at around 4K because I have to buy a new housing. Both individuals at DTE were very helpful and friendly. The lady who gave me the initial quote said she was going to try and find a housing for cheaper and is going to call me back in an hour. I have to find out more specifics here but so far here is where I'm atDTE- great rear diff for $4000
RPM- both rear end and trans upgrade for $5500
I need to figure out specifically what both of these deals entails, but have any of you had good or bad experiences with these companies?
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
I'm not sure who actually did the gear. All my mods were done by Livernois Motorsports. They don't do gears there in house, they send out, and I didn't think to ask to whom. :o Dumb, I know.... I did give DTE powertrains a call today and talk to a tech guy, recommended the stage 3 rear diff. He also said that I need to upgrade the tailshift, so you guys were right on with that. I Then talked to a lady who gave me price ideas and we were looking at around 4K because I have to buy a new housing. Both individuals at DTE were very helpful and friendly. The lady who gave me the initial quote said she was going to try and find a housing for cheaper and is going to call me back in an hour. I have to find out more specifics here but so far here is where I'm at
DTE- great rear diff for $4000
RPM- both rear end and trans upgrade for $5500
I need to figure out specifically what both of these deals entails, but have any of you had good or bad experiences with these companies?
I Then talked to a lady who gave me price ideas and we were looking at around 4K because I have to buy a new housing. Both individuals at DTE were very helpful and friendly. The lady who gave me the initial quote said she was going to try and find a housing for cheaper and is going to call me back in an hour. I have to find out more specifics here but so far here is where I'm atDTE- great rear diff for $4000
RPM- both rear end and trans upgrade for $5500
I need to figure out specifically what both of these deals entails, but have any of you had good or bad experiences with these companies?
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 30
Likes: 0
From: Mt. Pleasant Michigan
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Lots of people have good luck with the 05 rear ends, I had one survive 301 drag strip launches at 6k before it blew.
Other folks have had their stock rear break, normally from wheelhopping with run flats.
So whether or not to upgrade was a decision best made before you built your 05 rear as upgrading gears is the same price for 05's or 06's. But you are where you are and you have to make the decision to upgrade or not. I personally made the decision to downgrade to a C5 rear which is a much cheaper option as I posted. Remember, I didn't have a core rear so I was sunk. The 05 tranny bolts to the C5 rear and C5 rears are cheap, I gave $1300 for a freshly built one and there's a DTE stage 5 for sale for $1,500 call the number in my sig.
If you want an upgrade at least get your rear re-built so you can sell it for more than $500 or less which is all it's worth as a core charge. A good rear is worth some money, $1500 at least.
Last edited by Joe_G; May 1, 2009 at 01:48 PM.
Drifting
Joined: May 2008
Posts: 1,621
Likes: 2
From: Petal Ms
St. Jude Donor '08-'11
Like Joe_G said, you need to take it up with Livernois. There is no reason that you should be having to dish out money for a rear end again. THIS IS SOMETHING THAT SHOULD BE COVERED!~
Thread Starter
Intermediate
Joined: Aug 2008
Posts: 30
Likes: 0
From: Mt. Pleasant Michigan
They will give you what you bargained for - a 3.90 equipped rear end that works.
Lots of people have good luck with the 05 rear ends, I had one survive 301 drag strip launches at 6k before it blew.
Other folks have had their stock rear break, normally from wheelhopping with run flats.
So whether or not to upgrade was a decision best made before you built your 05 rear as upgrading gears is the same price for 05's or 06's. But you are where you are and you have to make the decision to upgrade or not. I personally made the decision to downgrade to a C5 rear which is a much cheaper option as I posted. Remember, I didn't have a core rear so I was sunk. The 05 tranny bolts to the C5 rear and C5 rears are cheap, I gave $1300 for a freshly built one and there's a DTE stage 5 for sale for $1,500 call the number in my sig.
If you want an upgrade at least get your rear re-built so you can sell it for more than $500 or less which is all it's worth as a core charge. A good rear is worth some money, $1500 at least.
Lots of people have good luck with the 05 rear ends, I had one survive 301 drag strip launches at 6k before it blew.
Other folks have had their stock rear break, normally from wheelhopping with run flats.
So whether or not to upgrade was a decision best made before you built your 05 rear as upgrading gears is the same price for 05's or 06's. But you are where you are and you have to make the decision to upgrade or not. I personally made the decision to downgrade to a C5 rear which is a much cheaper option as I posted. Remember, I didn't have a core rear so I was sunk. The 05 tranny bolts to the C5 rear and C5 rears are cheap, I gave $1300 for a freshly built one and there's a DTE stage 5 for sale for $1,500 call the number in my sig.
If you want an upgrade at least get your rear re-built so you can sell it for more than $500 or less which is all it's worth as a core charge. A good rear is worth some money, $1500 at least.