Rear of car Rumbles at Low rpm's

[accident]

When my center support bearing and guibo got changed, the CSB rubber holding the bearing was completely shredded, haha. i wish i'd taken pictures. the bearing came out of the rubber before we could get it off the shaft using the bearing press. good times.

[x68monkeyx]

You are correct sir. Csb it is! Now, my mechanic will tell me if i need a new driveshaft or not. I really hope i dont but if i do i dont have the money to get it fixed sad to say :(

[SpecM]

no i didnt take the heat shield off. I checked it at the transmission and the diff like you said and it didnt give at all

yea, take off the center heat shield and see what it looks/feels like up there

[x68monkeyx]

no i didnt take the heat shield off. I checked it at the transmission and the diff like you said and it didnt give at all

[SpecM]

well i put my car on the lift today and checked it out, the driveshaft dosent budge and the exhaust is sound. So im gonna take it to my mechanic and ask him what he thinks.

-did you take off the heat shealds and check the driveshaft in the center?
-sometimes a CSB can be bad and not show much play at the tranny or diff

[z31maniac]

If the csb is good, I'd think the pinion bearing in the diff.

[x68monkeyx]

well i put my car on the lift today and checked it out, the driveshaft dosent budge and the exhaust is sound. So im gonna take it to my mechanic and ask him what he thinks.

[HST]

I'd just change your CSB and Guibo. If the noise is still there then look into the driveshaft. U-joints go bad far less than CSBs and Guibos.

[Adrian_Visser]

umm i dunno proly 3 hours shop labour. it took me five hours to do it but i had to pound off the old bearing from the ds. i think a refurb driveshaft should be about $500. i dunno whats the shop rate where ur goin to get it done?

[x68monkeyx]

how much am i looking at to have that fixed?

[Adrian_Visser]

+1 on the csb. symptoms are vibration/thumping/rumbling at lower rpms under heavy load right? i just did mine a week ago the shitty thing is it didn't completely fix the problem it just tightened up the vibration a lot but its still there. apparently (from reading other posts on here) the csb usually fails because the driveshaft u-joints are binding or seized so theres a good chance u should just get a whole rebuilt driveshaft to save yourself the trouble of doin it twice.

[Nicademus]

My exhaust was rusted through and hanging on mine plus there was a hole in my cat. It made similar sounds. Fixed both and now its a whole new car.

[x68monkeyx]

wheel bearings were replaced not very long ago and the exhaust dosent seem loud at all

[drift]

Does it sound like wheel bearing? Or if your exhaust is somewhat loud, then it seems the noise covers that rumble over 2.5k rpm ?

[x68monkeyx]

no the rumble stays the same, but goes away after i get past 2-2.5 rpm. but im giong to check the shaft right now, thanks for the info