Wheel Bearing, Half Shaft U-Joint or ???
04-27-2004, 09:46 AM
#1
Drifting
Thread Starter
Wheel Bearing, Half Shaft U-Joint or ???
Left rear of my '78 SA has a little shudder and metal on metal clunking noise upon take off after driving about ten miles. I pulled into the shop, put it on jack stands and removed the rear wheels. Started the car and put it in drive. The left rear traling arm has a bounce up and down at a certain spot. No squeal at all and the right side is smooth. If I raise the leaf spring on the left side it gets better but still has a slight bounce. The leaf spring definitely needs to be replaced as the rear is sagging, but what would cause the trailing arm to bounce when it hits a certain spot in rotation. I initially thought wheel bearings but I'm not convinced since there isn't any squeal or noise. Any input or ideas???
04-27-2004, 09:19 PM
#4
Melting Slicks
Re: Wheel Bearing, Half Shaft U-Joint or ??? (1SGRET)
First off, NEVER, EVER, EVER try to run the car in gear with the rear suspension "hanging" at full extension. It was not designed to run that way, and the u-joints will bind. That it likely the reason for most of the "bounce" you are seeing.
Next, have you checked the halfshaft u-joints? If you are still seeing some "bounce" with the rear suspension at ride height, then it's likely that you have a bad u-joint that's seized up.
Next, have you checked the halfshaft u-joints? If you are still seeing some "bounce" with the rear suspension at ride height, then it's likely that you have a bad u-joint that's seized up.
04-27-2004, 10:37 PM
#6
Safety Car
Re: Wheel Bearing, Half Shaft U-Joint or ??? (1SGRET)
Make sure you have diff dluid in the rear. I had similar issues when I picked up my 79. It was fine until it warmed up a bit than the noise would start. I checked the diff fluid and there was none.....Filled it with gear lube and the additive and shes as good as new....
04-28-2004, 12:46 PM
#7
Race Director
Re: Wheel Bearing, Half Shaft U-Joint or ??? (sb69coupe)
First off, NEVER, EVER, EVER try to run the car in gear with the rear suspension "hanging" at full extension. It was not designed to run that way, and the u-joints will bind. That it likely the reason for most of the "bounce" you are seeing.
Next, have you checked the halfshaft u-joints? If you are still seeing some "bounce" with the rear suspension at ride height, then it's likely that you have a bad u-joint that's seized up.
Next, have you checked the halfshaft u-joints? If you are still seeing some "bounce" with the rear suspension at ride height, then it's likely that you have a bad u-joint that's seized up.