2004-2007 Cadillac CTS-V General Discussion Discussion, rear end noise in Cadillac CTS-V Series Forum - 2004 - 2007; Hi, I just purchased an 07V and it does have a light howl in the rear end. Usually nothing bad, ...
Hi, I just purchased an 07V and it does have a light howl in the rear end. Usually nothing bad, but I did a moderate launch today and it really started howling (almost screeching) at some speed. So I stopped and put it in reverse for a second to set the lash back (i don't know, the only thing I could think of). And the screeching went away.
Is this rearend totally fubared or can I can just rebuild it with new bearings? Do the cases warp on these? Will an 09 pumpkin fit in? Any help/advice is appreciated.
This is the most asked question here, most well known and documented issue with the car you just bought. You'll need to do some searching here. Your warranty or lack thereof should have been explained to you prior to purchase, if it wasn't that points to "none". Virtually all stock diffs whine, if it's howling badly it is damaged in some way- like mine. You can probably drive on it forever that way if you aren't launching the car and it's a newer 25xxxxx series. There are three solutions currently, GFORCE 9" kit for $5500, Creative Steel 8.8" kit for $4250 I believe, and a new stock diff for around $1600 that may or may not be noisy out of the box. Welcome, take comfort in the fact that you are not alone and that there are extensive discussions on this topic.
If the first dealer you go to says no, move on to another. Some dealers will deny you right out of the box. Others want the work. I took mine in for a fluid change, and they replaced the whole carrier.
mine had no trouble replacing it when i explained the noise. just tell them what it is doing, and they will know what is wrong... make sure they know you know it is a problem.
It is worthwhile to note that if it only happens when you are actually on the gas pedal (even slightly) that is a good indicator it is the rear, and not another drive line. My first diff would start whining around 42 mph, you could just lightly touch the gas pedal to make it whine then let off and nice and quite...