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Upgrade rear end on C5?

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Old Oct 15, 2008 | 10:13 PM
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Default Upgrade rear end on C5?

I have a 1998 I am dropping in a LS2 stroker with all forged internals with medium Lunati Cam L92 heads and L78 intake, 42 lb injectors, with long tube headers. With this power I have a stock rear end assembly with 2.73 Auto. I was wondering what I need to upgrade my rear end?
I was thinking 3.73 gears with 3000 stall convertor, do I need to do anything to my transmission, any information will help thanks
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Old Oct 15, 2008 | 10:14 PM
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Also do I need to upgrade my axle shafts?
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Old Oct 15, 2008 | 10:36 PM
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Originally Posted by 1998StrokerVette
Also do I need to upgrade my axle shafts?
Nope, but I'd upgrade the output shafts in the differential.
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Old Oct 15, 2008 | 10:39 PM
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so the stock tranny andc 2.73 differntial will hold that power with just upgrading my output shafts?
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Old Oct 15, 2008 | 10:48 PM
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Originally Posted by 1998StrokerVette
so the stock tranny andc 2.73 differntial will hold that power with just upgrading my output shafts?
Doubtful. If you are going to crank up the HP/TQ, then you have to put it to the ground. If you want to drag race, or just simply be able to hammer it when you want without worrying, then a driveline upgrade is necessary. Lot of guys happy with their RPM auto's, and a RPM or DTE differential is a safe bet as well. I would deep six the 2.73 gear, unless you are going for a land speed record
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Old Oct 15, 2008 | 11:23 PM
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A DTE differential brace is a good idea.

Peter
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Old Oct 15, 2008 | 11:47 PM
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How much can my stock tranny take, can I just upgrade the diff to a DTE 3.73 and add a 2800 stall, or do I need to go deeper than that?
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Old Oct 16, 2008 | 01:57 AM
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Originally Posted by 1998StrokerVette
How much can my stock tranny take, can I just upgrade the diff to a DTE 3.73 and add a 2800 stall, or do I need to go deeper than that?
Why not give RPM transmissions a call? The can answer all your questions concerning your driveline, and tell you exactly what you need based on your horsepower, and how you intend to drive the car.
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Old Oct 16, 2008 | 08:54 AM
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Originally Posted by 1998StrokerVette
I have a 1998 I am dropping in a LS2 stroker with all forged internals with medium Lunati Cam L92 heads and L78 intake, 42 lb injectors, with long tube headers. With this power I have a stock rear end assembly with 2.73 Auto. I was wondering what I need to upgrade my rear end?
I was thinking 3.73 gears with 3000 stall convertor, do I need to do anything to my transmission, any information will help thanks
^^I would contact Rodney at RPM and talk with him. Tell him what your plans are and I am sure he will give you great advice.
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Old Oct 16, 2008 | 10:13 AM
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Originally Posted by 1998StrokerVette
How much can my stock tranny take, can I just upgrade the diff to a DTE 3.73 and add a 2800 stall, or do I need to go deeper than that?
my 3/4 clutches went out @ 80k miles with only intake and exhaust
I had G at ACE Transmissions (LS1Tech Vender) build mine. LOVE IT!
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Old Oct 16, 2008 | 10:32 AM
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You should definitely consider a DTE brace. I'm running an RPM Diff w/3:73's and a 3600 stall ans DTE brace. I would call RPM as stated above. If you do a search, you will notice most of the high HP cars here run an RPM tranny. They build a sick differential as well
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Old Oct 16, 2008 | 07:50 PM
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Originally Posted by 1998StrokerVette
I have a 1998 I am dropping in a LS2 stroker with all forged internals with medium Lunati Cam L92 heads and L78 intake, 42 lb injectors, with long tube headers. With this power I have a stock rear end assembly with 2.73 Auto. I was wondering what I need to upgrade my rear end?
I was thinking 3.73 gears with 3000 stall convertor, do I need to do anything to my transmission, any information will help thanks
(Paraphrasing): A chain is only as strong as it's weakest link.

Plan accordingly.
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