Snowwolfe

Am shocked you might of wrecked a set of gears with street tires. Normally nothing breaks until you are running some type of slick or experiencing axle hop.

div7racer

I have had direct contact with 4 C7 corvette owners plus myself that have had spider gear breakage.All of us have a "*****" automatic.One owner who is presently upgrading to a 1500 HP set-up has had me modify his undamaged differential (his is a manual trans)with 4 spider gears (as I did in a used replacement) instead of just the 2 as it is produced.I believe there is a company that will soon have a heavy duty differential (ring gear carrier section only) for the non-elsd units.I have even spoken with the manufacture of the differentials for GM,and they say they are not allowed to supply any parts to anyone, except GM. As long as the side gears are still good the spider gears and cross shafts can be replaced with C6 parts.If anyone has some good side gears from a C7 I am interested in obtaining them for future repairs for those who need them.
Ed

TXshaggy

Previous posts about wheel hop on launch...draw your own conclusions.

smajicek

I saw this happen on the Ron Fellows school track when the instructor was demonstrating launch control. GM covered this cause it was a stock Z51. I have 610 RWHP with ***** automatic cause I live in California and need to keep the wife happy and no problems to date. Knock on wood.

Walt White Coupe

smajicek,

I saw, I saw, I saw...Write it a hundred times.

Liter of cola

Yup i get wheel hop with everything stock, how is this my fault. Gm says its a normal condition.

Foosh

One of the nice side benefits of the DSC Sport MSRC controller is that as soon as the system sees WOT, it softens the rear dampers, squats, sticks and goes without wheel hop.

While GM condones "track use," I don't think that includes drifting and donuts. You may have stressed the spyder gears earlier, and your last launch was the final straw.

Liter of cola

Whats the cost of going to a 4 spider gear setup and whats the cost?

My car wheel hops bad with launch control and there was no hop when i did the doughnuts, i get wheel hop when i hook not when purposley over powering the tires they just spin at that point. Before this day the most abuse The car saw was launch control and some back roads.

Im at 5k miles btw

Foosh

I'm not talking about OEM launch control. I'm talking about a replacement aftermarket controller which transforms the way an MSRC-equipped car performs, including hard launches. A big cause of wheel hop is a rear suspension which isn't effectively transferring weight to the rear wheels.

Liter of cola

Ooh.... well i wish i had that. I was gonna change the tires and then the bushings. But maybe that controller you speak of is an easier fix.

So installing the v2 controller on a stock suspension and runflat tires will cure wheel hop?

Foosh

While i can't guarantee it will totally eliminate wheel hop, I haven't seen it since I installed mine, but driver technique is always a factor. As I said, when the DSC controller sees WOT without lateral G forces, it immediately softens the rear MSRC shocks and transfers weight to the rear tires, which makes great launches much more effortless. When cornering, it stiffens things up on the appropriate side.

It's a much more predictive than reactive system like the OEM MSRC controller. I don't think the tires were your problem.

Liter of cola

The only way driver technique comes into play is if u try to launch on your own w/o launch control, in that case you have to slip the clutch to do it right, but i still get wheel hop at the top of 1st. I could have easily had the same failure down the road if i never tried to have a little fun last saturday, the wheel hop is what needs to go.

What needs to come out to change the diff on these cars? I might as well get the delrin bushings if the whole rear end needs to come out so i can put them in along with the new diff.

Z06 1of38

I had a friend who blew a tranny once.


I don't talk to him anymore.....

Walt White Coupe

One thing you are going to learn the hard way and the expensive way is that once you experience wheel hop, you have to "immediately" let off the gas. Blaming the tires or GM is just pissing in the wind. You should be blaming yourself for not knowing better.

ny32182

Well... I'm certainly no expert, and I know that a whole lot of people have many, many hard standing start launches without broken rear ends, but this is why I've always been more of a rolling start guy for my street fun. Rolling in from mid 1st or 2nd, I see as having much better chance of hooking up/not putting it in the grass or wall, and much less chance of blowing up the tranny/diff/halfshafts/whatever.

Maybe if you didn't have a tune you still have some chance of getting a warranty coverage? I wish you the best of luck.

thill444

100% agree with you. Launching high horsepower RWD cars is not childs play and puts a lot of stress on a lot of components. I much prefer letting the car rollout first and with an NA engine it is instant response and sometimes faster that spinning tires and trying to hook up.

JoesC5

Are the C7's spider gears weaker than the old C6's? If so, you would think GM would resolve the problem by a redesign.

When the C6's first came out, people were blowing the CV joints. GM changed the design of the CV joints for the C6's and they were weaker than the old C5's. C5 axles in the C6 solved the problem.

I believe GM finally fixed the design.

As for wheel hop, the C6's also had it, but when they introduced the ZR1, they had different diameter axles(left to right) to cure the wheel hop, and they also put the larger axles into the Z06.

GM is pretty proficient about redesigning parts to reduce manufacturing costs, and ending up with weaker parts than the ones they replaced, meaning they have to go back and redesign the parts again to fix the problem they created.

jaden61

djnice

Kind of crazy they broke just spinning them. That isn't as much load as a prepped track and hooking them up on a good launch. You can spin them just as hard with a stock motor. Hopefully the dealer sees it this way too.

0DSC Sport

If the rear caster angle is not set the hop may be worse. you can tune it with the DSC. Have you set the rear caster