AirBusPilot

I was told last night by someone who should know that the 09 Z06's are now using the ZR1 axles. Anyone hear this?

2002rich

ZR1's are using the Z06 2009 axles
Left side 40mm and the right 33mm. It is not for strengh but rather to reduce wheel hop. (all about harmonics)

0Anthony @ LGMotorsports

They should have a different spline count as well. I have not confirmed that yet, but I think it is more than just the diameter of the shaft.

AirBusPilot

That's what I heard, harmonics elimination to stop wheel hop. Thanks! (new 09 Z06 guy).

BubbaDuss

also, rumor has it with the different cradle, it moves the axles to diff point further back ever so slightly to make the 09's and newer less willing to lose the rear end.

still does though.

JoesC5

it's been a while since I checked my axles on my 09 Z06, but I believe they both were 33mm. Car built in June 08.

AirBusPilot

Just did a unscientific measurement with my hand reaching under the car and grabbing the axles, they both feel the same diameter.

'06 Quicksilver Z06

That is GREAT news if it's true.

I had the axles in my '06 replaced to '08 axles for more strength.

If the '09 Z06s got the '09 ZR1 axles, that's even better.

The axles may have a tag on them. Have you noticed one?

2002rich

Yes starting in 2009 the cradle is slighly different; however I was told that it was for a different reason. The ZR1 diff is larger and the routing of the lines need to clear, dunno. One thing for sure, the ZR1 diff is larger and that in itself probably was the reason for the change.
Since it is a production car, the 2009 cradle is a common part in both the 09 Z06 and the ZR1.

0Louis @ LG Motorsports

Spline count is different, diameters are the same. Side to side is the same. Camaros have the new biased halfshafts, but the corvettes do not.

2002rich

Louis I am not doubting you just trying to make sure I understand your post.
1) Are you saying that the left side CV halfshaft is not 40mm and the right side CV halfshaft isn't 33mm starting in 2009 Z06 and up?
2) So you are saying that the spline count is different. Is that left and right?

My interest in all of this is....................
I thought I did all my homework on this subject when I decided to pull the trigger on getting a ZR1 Trans, ZR1 Diff, 09 cradle, Pfadt C5 to C6 mounts and utlilizing my C5 CV halfshafts and of course modifying my exhaust. Yep it's going in a C5 Z06 Don't need to change my lower control arms because I have coilovers. I also thought that even though the left side CV halfshaft was 40mm, it was not a straight 40mm but rather a transition which is why the bearing ID is larger but you could still use your existing CV halfshafts because the splinning is the same on the diff side. Now I'm

0Louis @ LG Motorsports

The halfshafts on 2 09 Z06s here are the same- They share the same LARGER spline count hub as the ZR1. I will not be able to confirm/crawl under a ZR1 until monday...

Having said that, the hubs on the 09 ZR1s and Zs are the same. I will confirm monday that the axles are the same as well, or not the same.

2002rich

Thanks

zo6landrocket

I am doing a ZR1 tranny and differetial on a 2008 ZO6. Do I now have to order the 2009 cradle too? RichieRichZO6 are you lisitening?

2002rich

I made a bold statement about the ZR1 diff being larger and so I went back to the thread on LS1 Tech and copied the pictures of a Z06 and ZR1
diff. After looking at the pictures again, the ZR1 may not be any larger but rather appears to be more stout. Here are the pictures.









Often I find many posts that are presumed to be fact and then learn otherwise, not that it's done intentionally, most likely the thread was never updated with more current information as it became known by the the OP.
BTW - I am not trying to take this thread OT but I do think it is relevent.

MTIRC6Z

ZR1 diff in a car with a pre 2009 cradle...can be done but a fairly significant notch wiil be required in the 08 and earlier cradle due to the fact that ZR1 diff has the cooling line exiting the diff at the back instead of the bottom...but still, there's really no need to get a new 09 cradle.

As for the ZR1 axles helping with wheel hop, this is NOT so according to JHerbert's experience, apparently the ZR1 has the same very cushy control arm bushings as the Z06 and it's these which are really contributing to the wheel hop.

Lastly, C5 axles will work perfectly with a ZR1 diff in a pre 09 Z06 with no cradle change (but with a notch)...this I know from personal experience.

Cheers, Paul.

Zip Corvettes

Ok lets get to the end of this.
The ZO6 and the ZR1 only share the RH axle. The ZO6 and Z51 in 09 recieved the larger spline bearing and axles ends. The ZR1 LH axle is larger then the RH and the ZO6 axles. Only the ZR1 gets larger axles in 09 and 10. The larger axles was for wheel hop, but not eliminating it. It was used to keep the frequency from traveling from one side of the car to the other. It will not eliminate it completely but it will keep the diff from being exploded by the frequency bouncing from side to side. On another note though, it all changes when you change tires or anything in the rear suspension. So if someone is thinking they will use the axle to help and they have anything other then the PS2ZP 335 on the rear, it probably is not going to do what you are intending it too.
Thanks
Justin