Hey everyone, I’ve got an 05 c6 with a manual transmission. I just wanted to hear others experiences with the differential. I know the 05 has a weaker differential in comparison to the 06+ but I just want to see if anyone else has had theirs grenade on them. My car had an intake, long tube headers, a full exhaust system and a tune. Estimated around 450hp. I’d like to drive the car without fear and I’m afraid of doing any first gear pulls in it because of the differential. I just want to see how much power other people are putting on theirs and what causes the different to fail.
Thanks!

 

any diff could fail under the perfect conditions and more so the 05. what I understand is that isn't so much hp but grip that will make those diffs break. easy fix is to find a c5 diff (potentially a 3.42 or z diff) and it is a direct fit and the addition of a back diff mount and that serves to mostly solve that problem. ensure that the case is a 3rib case first of all and I believe that even the 31.5 diffs can accept bigger gear rings (someone correct me I'm speaking outta turn on that)

 

My tires aren’t anything special, I’m about to get new ones, most likely michilin Z rated tires. Would the grip from new tires be enough to blow the diff? I’m not doing any clutch dumps but I would like to give it some go in each gear

 

Like are you planning to run every red light a quarter mile at a time?! 😂
at 450 it should be fine but at the same time if you keep it up then it will fail
invest in a c5 diff, it will work on an 05 look out the for the rear diff mount makers and easy swap if you’re that concerned. As long as you’re not living a light to light life you’ll be fine

 

lol definitely don’t plan on driving it light to light like that. But if another car would want to race off the line I’d want to be able to give it juice without worries. And maybe some donuts here and there lol

 

Never going to happen, since you get into wheel spin, the tires start to wheel hop, and one of the tires is going to come back down to get enough of a bite, to not only crack the diff case, but could break the trans output shaft as well, as the rake gear tries to climb up and out of the ring gears from all that added torque to diff



The big one with the later diffs, is GM installed more internal ribs in the case, to make the case itself stronger to begin with..

So not saying that with enough grip and strip prep, your not going to over torque the diff case to blow it up with enough launch G's and no tire spin, or that you can not spin the tires without wheel hope and not be safe (do it all the time to get the back end loose to change lines on the way into apex's when I need to pass someone just before the corner),
But get into wheel hop with even a built diff for the one of the tires to come down hard to over torque bite, kiss the diff good by.

Also note, when you get the back end loose on acceleration, quick way to end up with rear snap hooking on even light tire bite, to crash you out as well.

Hence between suspension and sway bars to keep car level in corner, and diff having LS clutch packs to keep both tires spinning at the same rate, when one of the tires get a bite, its going to cause the back end to really swing out. With the C6, most of the time the back end is going to snap hook out to the right, while on the C7, back end will snap hook out ot the left instead. So know the limitation of what grip you can get with the tires as you are rolling into the throttle, instead of just using the gas pedal like an on/off switch to loose rear end traction wildly instead.


Simply put, the vet is not your dad's pinto station wagon, but a High horsepower sport car that even the base cars will do close to 200mph, that will try to kill you every chance it gets. you skating is past its limit abilities, or your lack of driving talent in a High hp sports instead.

And no, nothing balanced like a 911 or other refined sports cars between HP and handling abilities,
but instead in the C6 up vets, and its gobs more HP that is handling abilities, and why it trying to kill you every chance it gets/any driving mistake you make instead.

 

Hello!

New to the forum. I’ve got a 2005 c6 manual (3.42 gear ratio). Getting ready to put a C5 diff on and when we got it up on the lift, noticed that the one on it, was not the original. Called the previous owner, and he verified that when he bought it, the diff had just been replaced. That was about 3 years ago. My question is, is there a way to know what year car this came off of? SURELY, anyone that went to the trouble to replace the rear end would not replace it with another weak one off an 05’. But, people do crazy stuff! I’d like to confirm that what’s currently on it is a 06’+ or maybe even one from a C5. Where are the ID numbers located on the differential itself? I’ve read so much about this that it’s all running together! Is there a way to know what year car this came off of, and if so, where is it stamped?