88 custom

Ive been hearing a knock or a loud thumping when i drive i changed both sway bar links that seemed to be ripped to shreds and still i hear noise i have a 1968 delta 88 custom plz can someone help? (Its not the engine).

Erinyes

You didn't forget to let your friends out of the trunk the last time you all went to the drive-in, did you?

88 custom

Lol very funny!

Erinyes

I couldn't resist :-)

Seriously, though, more info would be useful. When does it make noise? Constantly? Only when turning? Does it vary, and if so, does it vary with engine rpm or road speed? More data!

88 custom

it doesnt make noise when sitting steal mainly when picking up speed over 15 mph driving straight then it starts to thump i can fill it trew the floor board

Erinyes

Check your u-joints, pronto.

88 custom

ok thanks man! i hope it isnt bad.

88 custom

couid it be the tranny? cause it drives good except for the noise.

yzzerdd

Honestly, I'd say it is more than likely not the tranny, but definitely the U-joints. I'd replace the U-joints and such, and see how things go. Inspect the driveshaft for damage as well. When you put the car in gear, does it clunk?

--Ryan

70 cutlass s

More detail when does it do it. Turning, giving it gas, or braking it could be several things.

88 custom

It starts to make noise when i press on the gas the faster i go the louder it get i can fill it on the floor board..

Lady72nRob71

Is it coming from the front or back?
Withthe car parked, grab ahold of the top of each front tire and push and pull it vigorously. If anything seems loose, you are getting close to the problems, either ball joints, wheel bearings or bushings.
There should be a reason your end links were torn to shreds - they usually do not wear that way.

citcapp

Check your universal joints at each end of you drive line could be that one or the other is going out. Lots of people forget to grease them. Not a pretty site if the front breaks and you do a drive line stand

yzzerdd

Ha, maybe you should check to see if someone attached a big 'ol zip tie to your driveshaft. Its a common prank around here to loop a big zip tie around a driveshaft (FWD or RWD) and then when they drive, the slack of the zip tie thumps on the bottom of their car. Then they think they have this big issue, when it's really only a zip tie.

But seriously, I'd bet on the U-joints. But, to make an even more accurate assesment, we'd need to know exactly where the noise is coming from.

--Ryan

oldcutlass

Try looking at your body bushings????

88 custom

thanks guys i found the noise it was the rear rt tire the bearings are bad.