LB

Here are some pictures of the ZR1 Diff (right) compared to the Z06 (left)

It looks to be quite a bit stronger









If you wanted to use this diff, it would require you simply bolt up a c6 rear subframe in your c5. Direct bolt on baby. I LOVE CHEVROLET

Brandon619

I think you need a C6 cradle to run that rearend. Looks strong.

LB

Yea, I mentioned that above.

If you look at that last picture, you will see even the inside of the casting is larger.

uniquec5

Im reading you mind!!

95vettski

Your going to give the rear end a good work out aren't you

Let's hope it holds your power!

LB

Leaving the line with 5-6 PSI shouldn't be a stretch.

JustinStrife

There's gotta be a way to drop the entire ZR-1 drivetrain into my C5 coupe...

LB

The Trans and Diff will fit in the C5 with the use of a C6 rear sub frame. Not sure about the torque tube ...

Smoove

...yeah, thats the setup I'll have when I grow up. ZR1 trans+diff+cradle and lower A arms.

98vettedave

Do you have any idea of what the cost would be for the parts and installation of a C6 subframe?I would like to do this if the price isn't too crazy.

Dave concrete

Is it alot of work to retro this? Looks like it could be as great mod.I wonder if a RPM tran/diff would be easiar and stronger and cheaper maybe.

LB

I hear that you might need the lower A-Arms in order to bolt up the C6 sub frame. I hope RPM can confirm this.

I know a sub frame will cost you a couple hundred, and the ZR1 diff is about 4K. I have a local friend who wanted to sell me the complete Z06 T60 drive line for 5K ...

RPM actually sells these parts built and modified. They will put custom 300m output shafts in the diff, along with their clutch pack and springs. I am not sure what they do with the trans it self, but I am sure it would be one solid drive line. You won't have to retro fit anything on the car, just replace the current rear sub frame with the C6 parts. We may also have to use the C6 lower controll arms, but I will have to find out more from the fellaz at RPM.

MarkT 2002

Why not just go with a Quaife or an OS Giken True Loc for about half the price?

LB

That won't improve the strength of the case it self. The carbon clutch packs and upgraded springs seem to hold up fine. The common weak links seem to be the output shafts and case. If the case allows flex, the pinion will move which will in turn snap the trans output shaft and blow the diff apart.

Jaxian

Well they said the rear ends on the ZR1 where going to be a lot stronger than any previous rear end, trans too. If you think about it, it makes sense. The car is 300lbs heavier than a C5Z with 50% more torque and bigger rear tires. If they didn't beef up that rear end a ton they would have been spitting pieces of them all over the road.

This isn't Nissan, (cough GTR trans), GM had to get this thing through durability testing, so you know it's a strong rear end. Same goes for the whole ZR1 drivetrain, when you can get the GM pieces later on for cheap you could skip half the aftermarket 'will it work?' slaptogether items and just put in the ZR1 drivetrain front to back minus the motor. I mean it does make stock what most average F/I cars on here make, in a heavier car. Factory reliability, parts backing, availability, etc. that would be sweet.

LB

There is only so much any differential could take before it spits parts. The A4 parts live so much longer because it loads up the driveline before leaving the line. The M6 guys must free wheel the drive line, and shock the system in order to short the car. With the proper drive line and suspension, we can take these FI whips to the track and still hit the boys up for coffies and show off the slips that same night.

highpockets

You need a bigger OP shaft for the six speed as well as trans extension housing. C6 cradle,rear lower control arms and rear spring as well as some custom mounts for the diff. Exh needs some modifying in order to clear the case,should make a pretty stout setup. I did a conventional C6Z diff as it was significantly cheaper and more avail than the ZR1 at the time. I suppose if I break the case,I may have to try the ZR1 next ! Here is a stock C5Z next to the C6,big improvement !

LB

OHH Right, I forgot about the transmission output shaft size. That was the main reason to upgrade ! the small 28 spline shaft the T56 uses is nothing compared to the new 32 spline T60 Now the 32 spline T60 shaft can be installed into your T56 Trans which RPM has in stock. This might save you a buck or two ...

highpockets

If you look on the floor in front of the diffs,you will see the respective output shafts.An interesting side note,the newer,larger output shaft was almost half the price (new vs new) as a C5Z output shaft ! So I saved some money by doing the conversion(yeah right !) That was a big reason for me too,as well as the way the diff mounts,I think it will be much sturdier(it feels better driving it,very noticable)

SCannon

I did the C6 Z06 Conversion in my C5 last year. Parts required are...

Transmission Tail Housing
Transmission Main Shaft
Both Lower Control Arms
C6 Crossmember
C6 Rear Spring
For 6-Speed, Custom Offset Mounts
Minor Exhaust Modification

I recieved my parts from RPM, they installed my new Mainshaft, and built my C6Z06 Differential. Definately stronger and better than the C5 design.