97 Z28 wierd sound after driving awhile
#1
97 Z28 wierd sound after driving awhile
Hi everyone,
Well the title says a lot here. I have a 97 Z28 with automatic trans, 127,XXX miles and when I first pull out of the garage it does not make this sound but after driving awhile, like say 20 minutes at least, when I make a turn left or right I can hear some sort of rubbing or scraping type of sound. Seems to come from the rear area. My mechanic and I can duplicate the sound in the parking lot but once it's up on the lift we can not find anything wrong or out of place. So, it's something that happens on the ground under the weight of the car and it's happening during a turn and after things are warmed up, which makes me wonder about things like rear brake pads or would my tires be swelling a little but I don't see any marks from rubbing anywhere? I don't know.
Anyone have any ideas of what to look for?
Thanks! You've all been so helpful in the past, I really appreciate it.
Jeff
Well the title says a lot here. I have a 97 Z28 with automatic trans, 127,XXX miles and when I first pull out of the garage it does not make this sound but after driving awhile, like say 20 minutes at least, when I make a turn left or right I can hear some sort of rubbing or scraping type of sound. Seems to come from the rear area. My mechanic and I can duplicate the sound in the parking lot but once it's up on the lift we can not find anything wrong or out of place. So, it's something that happens on the ground under the weight of the car and it's happening during a turn and after things are warmed up, which makes me wonder about things like rear brake pads or would my tires be swelling a little but I don't see any marks from rubbing anywhere? I don't know.
Anyone have any ideas of what to look for?
Thanks! You've all been so helpful in the past, I really appreciate it.
Jeff
#2
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,351
Sure sounds like an issue with your deferential. The deferential allows the rear wheels to turn at different speeds. The harder you turn the more the deferential has to work. Your Z28 has limited slip/Positive traction to prevent one tire from spinning under hard acceleration. As you can see one system allows the tire to slip and the other system tries to limits how much it slips, It is common for there to act up when hot and there is an additive you can add that may quit it down.
#5
Last edited by Y2K; 09-23-2018 at 11:13 AM.
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