Gforce axle testing conclusions

[maxspeed96ct]

pics look good, but im lost.

I read a thread that whisler elimintaed hop, but now it says in the original post that it didnt and he need a 05 axles on the drivers side?

Did you guys find a cure or are you still working on it?

[whisler151]

Originally Posted by maxspeed96ct

pics look good, but im lost.

I read a thread that whisler elimintaed hop, but now it says in the original post that it didnt and he need a 05 axles on the drivers side?

Did you guys find a cure or are you still working on it?

I did NOT cure hop on my 2007. The Gforce axle we installed on Dannboss' car DID cure 90% of the hop.

On the LS2 Vs, using the aftermarket axle was like replacing it with a stock one. It was pretty damn close to the same size. What we are thinking now, is that the LS2 Vs need a smaller axle on the driver side. In reality, it really doesnt matter which side, i'd prefer having the thicker one on the passenger because it is longer.

The next step now that we think we know what the problem is, is for Gforce to send me one of his new smaller diameter driver axles. If that doesn't work then eff it. I'll just go back to less grippy tires and my hop is gone. I was hoping I could have sticky tires and no wheel hop.

[GFORCE1320]

Originally Posted by whisler151

I did NOT cure hop on my 2007. The Gforce axle we installed on Dannboss' car DID cure 90% of the hop.

On the LS2 Vs, using the aftermarket axle was like replacing it with a stock one. It was pretty damn close to the same size. What we are thinking now, is that the LS2 Vs need a smaller axle on the driver side. In reality, it really doesnt matter which side, i'd prefer having the thicker one on the passenger because it is longer.

The next step now that we think we know what the problem is, is for Gforce to send me one of his new smaller diameter driver axles. If that doesn't work then eff it. I'll just go back to less grippy tires and my hop is gone. I was hoping I could have sticky tires and no wheel hop.

I'm sure your hop would be gone like dannboss's if you put an 04-05 axle in your drivers side to go with our big axle on the passenger side, then your setup would the same as his.
But the drivers axle I'm making will work even beter since it will be a bit smaller then the factory 04-05 axles, the difference between the 2 sides should work great.

Thanks
Chris

[maxspeed96ct]

Im no engineer but ive been around cars long enough, and im just not seeing how a smaller axle on the drivers side compared to the passanger side would cure wheel hop.

lenght? any one want to explane the theory?


I think having tighter U joints and bearings in the axle would help keep it tight ...


Either way keep testing bros...

[HeavyH20]

Torsional rigidity differential avoids the harmonic twist and recover between the right and left side to avoid wheel hop. Since the return rates are asynchronous, you get more of a chatter than wheel hop in low traction scenarios. The other way is the Corvette approach (up until Cadillac shared the drive shaft approach with Chevy)to have slight different valving controls on the right and left side on the shocks so that return and bounce are different. The 04 Z06 had this added and the older ones really bounced.

[kirchbed]

Originally Posted by HeavyH20

Torsional rigidity differential avoids the harmonic twist and recover between the right and left side to avoid wheel hop. Since the return rates are asynchronous, you get more of a chatter than wheel hop in low traction scenarios. The other way is the Corvette approach (up until Cadillac shared the drive shaft approach with Chevy)to have slight different valving controls on the right and left side on the shocks so that return and bounce are different. The 04 Z06 had this added and the older ones really bounced.

And there we have it, from Dr.Heavy.

[maxspeed96ct]

Originally Posted by HeavyH20

Torsional rigidity differential avoids the harmonic twist and recover between the right and left side to avoid wheel hop. Since the return rates are asynchronous, you get more of a chatter than wheel hop in low traction scenarios. The other way is the Corvette approach (up until Cadillac shared the drive shaft approach with Chevy)to have slight different valving controls on the right and left side on the shocks so that return and bounce are different. The 04 Z06 had this added and the older ones really bounced.

cool shit, since my Kars kit elimtated about 90% on my hop. It may be worth a shot to swap out my passanger axel with a 06-07 one...

Ill have to keep an eye out for one... anyone know what OEM go for new?

[SkullV]

Swapping an 06-07 to one side with an 05-06 on the other side WILL NOT WORK. It has been tried by members here and will not work.

[whisler151]

Originally Posted by SkullV

Swapping an 06-07 to one side with an 05-06 on the other side WILL NOT WORK. It has been tried by members here and will not work.

Who did it? Did you? I know swapping axles from 05 to 06 has been a topic, but i think they did the both, not just swapping one. Dannboss has the Gforce axle which is the same diameter as my 07 axle on his passenger side and his stock 05 on the driver side. No hop.

I've got the Gforce on the passenger side which is same diameter as stock 07 and still hop. I will be putting a 05 in the driver side.

[maxspeed96ct]

Originally Posted by SkullV

Swapping an 06-07 to one side with an 05-06 on the other side WILL NOT WORK. It has been tried by members here and will not work.

I dont think it has been done, ppl have swapped in both axles like whistler said...


But this thread is the first time I hear of swaping just the passanger side.


Whisteler also check your diff bushing, at 60k mine was falling apart. I just put in the UUC one in.

[SkullV]

Originally Posted by whisler151

Who did it? Did you?

Originally Posted by maxspeed96ct

I dont think it has been done, ppl have swapped in both axles like whistler said...

But this thread is the first time I hear of swaping just the passanger side.

I don't remember honestly, but I remember I asked the question when the Hendrix/DSS solution was first released. Here is one post from TTS about it:

http://www.cadillacforums.com/forums...42-post37.html

and there is info about it SOMEWHERE in these 3 giant threads about it (but I don't feel like reading through all of them):

http://www.cadillacforums.com/forums...er-needed.html (Hendrix-Engineering econo axle tester needed!)
http://www.cadillacforums.com/forums...ou-axle-2.html (Hendrix-Engineering getting to know you axle sale!)
http://www.cadillacforums.com/forums...tom-axles.html (Testing new fix for wheelhop: Custom Axles)

I will also say that I had 06-07 axles in my V until I got my Hendrix Econo-replacement which works perfectly well with my 06-07 passenger side axle. The only time I get hop is when rolling in 1st gear and flooring it in the rain, or on hard drag launches on a prepped drag strip.

Good luck to Whistler and Gforce with fixing the problem, but I personally think that either the driver side axle was the way to go, or Whistler's rear end has other problems (spent bushings, bad shocks, etc. etc. etc.).

[maxspeed96ct]

Originally Posted by SkullV

I don't remember honestly, but I remember I asked the question when the Hendrix/DSS solution was first released. Here is one post from TTS about it:

http://www.cadillacforums.com/forums...42-post37.html

and there is info about it SOMEWHERE in these 3 giant threads about it (but I don't feel like reading through all of them):

http://www.cadillacforums.com/forums...er-needed.html (Hendrix-Engineering econo axle tester needed!)
http://www.cadillacforums.com/forums...ou-axle-2.html (Hendrix-Engineering getting to know you axle sale!)
http://www.cadillacforums.com/forums...tom-axles.html (Testing new fix for wheelhop: Custom Axles)

I will also say that I had 06-07 axles in my V until I got my Hendrix Econo-replacement which works perfectly well with my 06-07 passenger side axle. The only time I get hop is when rolling in 1st gear and flooring it in the rain, or on hard drag launches on a prepped drag strip.

Good luck to Whistler and Gforce with fixing the problem, but I personally think that either the driver side axle was the way to go, or Whistler's rear end has other problems (spent bushings, bad shocks, etc. etc. etc.).

thanks for the links, i agree that whistler might have something else like a bad bushing or something.. I couldnt believe how cheap the stock diff bushing was till i took it out.

[SlvrVee]

Originally Posted by maxspeed96ct

Im no engineer but ive been around cars long enough, and im just not seeing how a smaller axle on the drivers side compared to the passanger side would cure wheel hop.

lenght? any one want to explane the theory?


I think having tighter U joints and bearings in the axle would help keep it tight ...


Either way keep testing bros...

Found this great video clip of a Cadillac engineer explaining the 09 suspension and how they elimented wheel hop. Take a look at this clip (1min 24 sec in) and you will understand the two different diameter shaft helps prevent wheel hop.

http://videos.streetfire.net/video/C...ion_165628.htm

[whisler151]

Originally Posted by maxspeed96ct

i agree that whistler might have something else like a bad bushing or something.

You think I have wheel hop because I have a bad bushing? My bushing is fine. I'm not in a huge hurry to take my driver side axle apart. Frankly, doing the swap is not the most fun thing to do. I will be getting rid of my tires and going back to the regular Dunlop Direzzas, as I didnt have wheel hop with them...they just spun. It made the car a lot more fun to drive. I'd rather spin than hop any day.

[dannboss]

Maybe it's an ls2 problem. Just saying.