Looking for info on case options for a base coupe. I have broken TWO cases now with 1.5-1.6 60's with bias plies. Riding the clutch, not just dumping it.

I need a stronger case, but I'd like to stick with 4.11 gears. I know the base gears are smaller, but what is involved in fitting them into a Z06 case? I know the Z case is physically larger, but does it offer more strength?

I may just have to go with a Z06 diff in 3.42 ratio and add more power.

 

ZO6 case is stronger but no 4:10 gears made for ZO6 case

 

I know they don't make gears for the Z. Which is why I'm interested in getting base gears into the stronger Z case. If it is stronger.

 

Hey bro! Very sorry to hear about the breakage. I read somewhere where it was explained that the z06 case not only is bigger and better but your gears can be installed. I would definitely follow that route if possible. But my question now would be why yours keep breaking? Almost sounds like excessive twisting or the other way around like lack of play and the case is what gives up. I thought only the 05s had the fragile differential. Hope you can get it figured out.

 

Unless it's a 2005 model, it's usually wheel hop that causes case breakage.
Contact RPM and ask about fitting your 4.10's into a Z06 case.

 

Use your base carrier with the Z06 case.

 

There was no wheel hop. And I've read on here a few places that base gears and carrier don't go straight into the Z case. Trying to find out what is involved in swapping it or if it is for sure a straight swap.

I do my own diff building, so won't be sending it off. They are on the list to call, but just trying to gather as much info as I can to make an informed decision.

 

I am very curious. Are you using 2006 up base diffs? Exactly where are the cases breaking at? Could the diff be breaking something inside first and then taking out the case? Are you using C6 Z06 upgraded left and right output shafts and spiders along with carbon clutches?

 

First case was an 09. Cracked around the pinion. 09+ diffs came with Z06 clutches, pinion carrier/bearings, and output shafts/gears. Confirmed all of this with a couple shops and by part numbers.

This case is an 06 case. No damage to any of the working parts on either. Just broke the case internally.

RPM told me this is common when I talked to them. By the nature of the design, the ring gear tries to force the pinion rearward stressing the case in that area. 1.5x 60 times provide the necessary force.

 

Does a ECS diff brace help because it attached via the side cover?

Not a statement, a question.

Thanks!

 

*supposedly* that brace was designed to remove the twisting forces on the C5/05 C6 case. With the dual mounting point of the 06+ the advantage is gone. I looked into them pretty heavily and talked to a few places. No one seemed to have any trust in them anymore. The area where my cases are breaking is internally in the back.

People break with them, people break without them. Hard to say for sure.

 

 

RPM Transmissions now has 4:10 gears for the ZO6 differential per advertisement on this forum. That rear end may go into your car with some transmission parts changes. Contact them.

 

Thanks! I bought an ECS one because I looked at the drivetrain and the front to back is mounted at 4 points, so I looked at the ECS as a means of taking stress out of the trans/diff joint. No clue if it does any good or not.

Here is what ECS says. It is much different than DTE. If I remember correctly, the DTE only has two struts vs 4 for the ECS.

Why would you want or need a ECS Trans / Rear Brace?

Ever launch your Corvette hard, and it feels like the wheels are hopping? That wheel hop is actually the Drive line of your Corvette Shaking. In the C5 and C6 Corvette the transmission essentially “floats” in the driveline. It is not mounted to the chassis whatsoever. The Engine is mounted to the front cradle via the engine mounts and the rear end to the rear chassis. Both Factory mounts are rubber, and allow a certain amount of movement – especially under hard launches. This movement is felt, and usually explained as wheel hop and it can do some serious damage to your car!

So what does a ECS Trans Brace Do?

The ECS Trans / Rear Brace gives added rigidity to the entire driveline by tying the trans and rear together as a complete, more rigid unit. The ECS Trans Brace is made from top quality materials. Front and rear mounts are fabricated from laser coated, zinc coated steel with stainless steel hardware and aluminum tension rods to ensure a long lasting, rust free finish. The tension rods are turned from billet aluminum with high quality stainless steel heim joints with stainless steel hardware. The aluminum rod design provides increased strength, with heat expansion principles that match that of the aluminum transmission and differential.

 

They use base gears "modified" to fit into the Z case. I'm trying to define the "modified" part.

I already have a 30 spline output shaft. I upgraded that with the last diff.

 

So, does a C5 3 rib with DTE bracing hold up any better then an 06 diff as far as the case goes? It has been said that with the extra lower rear mount on the C5 adds strength to the case but it's the diff to trans area that give way and the DTE brace was designed to help prevent that by tying them together better?????????????