Bad vibration after coming home from the track
12-22-2007, 02:48 PM
#1
Bad vibration after coming home from the track I unloaded the car and took it for a spin, vibrates pretty bad. The faster you go the worse it gets. I had noticed a slight coast vibration from high speed(120+) But now is bad no matter what.
The car did wheelhop 5 passes until I figured the suspension out to make it quit. But did not notice it at the track.
The car has a 9 inch
31 spline axles
Detroit locker
Steel 1200 hp driveshaft
Nodular center section
I have it all apart now and see absolutley nothing wrong. The driveshaft slides in and out of the back of the tranny freely....output shaft looks fine and is centered in the tailhousing.
Front yoke has straight splines.
Axles look normal
Chunk looks normal, backlash is normal, gear looks great..I have not disassembled it and I see no need to.
I put it on jackstands and ran it to 90 mph and you could feel the vibration, not as bad as on the road though.
Removed rear tires and did it again, same no change. You can feel it in the whole car slightly prominent to the rear...
ANY ideas?
David
The car did wheelhop 5 passes until I figured the suspension out to make it quit. But did not notice it at the track.
The car has a 9 inch
31 spline axles
Detroit locker
Steel 1200 hp driveshaft
Nodular center section
I have it all apart now and see absolutley nothing wrong. The driveshaft slides in and out of the back of the tranny freely....output shaft looks fine and is centered in the tailhousing.
Front yoke has straight splines.
Axles look normal
Chunk looks normal, backlash is normal, gear looks great..I have not disassembled it and I see no need to.
I put it on jackstands and ran it to 90 mph and you could feel the vibration, not as bad as on the road though.
Removed rear tires and did it again, same no change. You can feel it in the whole car slightly prominent to the rear...
ANY ideas?
David
12-22-2007, 08:28 PM
#7
Brady, that is what I thought as well, but the pinion support is intact.
U joints also look and feel good.
The fluid out of the rear has that cloudy metal dust looking stuff in it. But can find no reason for it. I will pull the chunk all the way down tomorrow. I installed a new nodular housing when the car was down and used the same gear and bearings.
WIll update if I find something.
David
U joints also look and feel good.
The fluid out of the rear has that cloudy metal dust looking stuff in it. But can find no reason for it. I will pull the chunk all the way down tomorrow. I installed a new nodular housing when the car was down and used the same gear and bearings.
WIll update if I find something.
David
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12-22-2007, 10:52 PM
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12-27-2007, 02:48 PM
#16
What kind of trans? I had a couple Th350 bellhousings crack on me, until I switched to an JW "Ultra" bellhousing. First time, didn't know what it was, drove home 20 miles from the track at 30 MPH, vibrating all the way. it was holding by a 2" section. Yikes. I guess that could happen with any trans, but the TH350s were vulnerable.
Scotty
Scotty
12-27-2007, 03:23 PM
#17
What kind of trans? I had a couple Th350 bellhousings crack on me, until I switched to an JW "Ultra" bellhousing. First time, didn't know what it was, drove home 20 miles from the track at 30 MPH, vibrating all the way. it was holding by a 2" section. Yikes. I guess that could happen with any trans, but the TH350s were vulnerable.
Scotty
Scotty
David
12-28-2007, 08:03 PM
#20
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wow, mine did the exact same thing last week. horrible wheel hop and now its got a vibration and it clunks bad around turns. dont no what caused mine either. ive got a moser 12 bolt and a spool, driving on mt et street radials. it sounds like $hit is broke in the rear suspension and right under me.i would like to know as well.