: Test drove a V, concerns....?

10-04-07, 04:07 PM
I just got back from test driving a '04 CTS-V wtih 55,700 miles on it. I've had a claim history run on it & the rear diff has been replaced 3 times, most recently in Jan. of this year. I understand wheel hop is a HUGE problem with these cars, & coming from a pretty heavily modified C5 I know the problem well. I didn't do any hard launches during the test drive, but did notice something that concerned me. Say I was rolling along at 30mph, & slowly rolled into the throttle, taking it close to red line. The instant I let off the throttle I could hear (& feel) a noise from the rear. It was like something had jumped up from the road & hit the under belly of the car. It was not wheel hop, it was just one clunk. I was able to reproduce it every time.

Any ideas?


10-04-07, 05:31 PM
Bad diff support bushing or the rear cradle bolts aren't tight.

10-04-07, 05:36 PM
Could be the bushings inside the trailing arms are banging or the bolts holding the arms aren't torqued.

The BMR trailing arm replacement doesn't have the rubber, but they need (well mine did) shims to fit correctly and to be able to tighten and torque.

Same goes for the toe rods.

The BMR's are a vast improvement over stock.

10-04-07, 07:47 PM
cvp33's V. :D

10-04-07, 07:59 PM
my question is how much are they asking for the car? with those miles you are better buying the car and doing some type of Doug rear. do you plan on modding it?

10-05-07, 08:49 AM
cvp33's V. :D

So the owner is a member of the forum?

Thanks for the replies guys.

10-05-07, 10:22 AM
no he was just messing with you. I think CVP's car only had under 40k on it. But there were 3 diffs done on it.

10-05-07, 11:19 AM
no he was just messing with you. ...:yeah:

Weak attempt at an inside joke. :sneaky:

10-05-07, 11:28 AM
sorry I gave away your punch line :banghead: