Problem Confusion
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
Problem Confusion
Had our 67 out today. A strange symptom became apparent. On acceleration in 3rd I felt a slight wobble like vibration. It seems to be somewhere in the right rear. Almost like a Tire with low A/P. Tire pressure is 32PSI. It is only noticable during acceleration. Everything is tight under the car so I'm wondering if the Posi is acting up. Opinions welcome. Al W.
Drifting
Joined: Sep 2007
Posts: 1,369
Likes: 0
From: Detroit MI
Or it may very well be that a u-joint is on the way out. Lift up the rear of the car and wiggle your wheels for spindle bearings, stub axles and look for rust colored power around the u joints...all 6 of them!
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
I'll be looking into this later today and will report back. It is a very odd type of thing. I never rule anything out until culprit is found but this car is a totally restored vehicle and everything "BUT" the Trailing Arms was refurbished.
I'll be back! Al W.
I'll be back! Al W.
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Pro
Joined: Jun 2002
Posts: 538
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From: Johnsonville Wi
Posi trouble
Normally you will see upcoming posi problems by noticing a bit of a chatter (no noise with it, just can feel it) when making a sharp turn from a stop. I've never felt any symtoms when traveling in a straight line.
Having said that, I did at one time feel that chatter and after sucking out some lube that looked pretty "mature" and putting new lube in with a bottle of the posi additive my slight issue went away. Might not have been changed in 40+ years.
Daffy
Daffy
Having said that, I did at one time feel that chatter and after sucking out some lube that looked pretty "mature" and putting new lube in with a bottle of the posi additive my slight issue went away. Might not have been changed in 40+ years.
Daffy
Daffy
Drifting
Joined: Apr 2001
Posts: 1,401
Likes: 9
From: Holly Springs, Nort Cackalacky / Jupiter, Florida
On acceleration in 3rd I felt a slight wobble like vibration.
It's hard to venture a guess without knowing all that's been done, restored, changed, etc.....but,
Were you trying to say it's only a 3rd gear problem? Nothing in the other gears? Or you just happened to notice vibration like symptom in 3rd gear on heavy acceleration?
Last edited by RoadKing96; Jul 14, 2008 at 10:23 PM.
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
"Wobble" is the key word - a wobble or squirrelly feeling from the rear suspension usually points to toe-in shims that have fallen out, which lets the front of a trailing arm move laterally on the pivot bolt. 
Tech Contributor
Joined: Aug 1999
Posts: 15,188
Likes: 4,010
From: Connecticut, USA
I would get the car in the air and look it over, check for play in wheel brg's, arm,rubber parts. If you still have the original type shims they should be the double hole but if the car was done someone may have used the later slotted shims which would need the long cotter pin to hold in place. That would require drilling a hole in the frame like the 70-82's had.
If you do have play in the spindle I would look a lot closer and not drive the car.
If you do have play in the spindle I would look a lot closer and not drive the car.
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
Thanks to everyone. I still haven't gotten to it as everybody elses stuff comes first
And tonight my boat stops running! Grrrrrrrrr!
Al W. ( It's great being Dad and Grandpa!)>
And tonight my boat stops running! Grrrrrrrrr! Al W. ( It's great being Dad and Grandpa!)>
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
I've examined everything on my car and can find no problems. I'm starting to eye the Snubber for the Rear end. It looks fine, fat and happy! Is anyone aware of a Neopreme Bushing for this part? Al W.
Safety Car
Joined: Nov 2000
Posts: 4,761
Likes: 138
From: Clinton Township MI
Cruise-In III Veteran
67vetteal,
What you re experiencing could be what I experienced. I too noticed the back of my car getting squirrely under hard acceleration. Turns out the right rear trailing arm bushing was shot. I found that out by grabbing the wheel (weight of the car on the ground) at 3 o clock and 9 o clock. I was able to get a 1/4 inch of movement in/out. Further noticed when driving slow I could hear a clicking noise from that wheel.
Well, Gary Ramadie (GTR1999) has em and, as they say, nuthin money cant fix. I should get mine back this week. The right arm along with the bushing was toast...rusted out and deformed.
Got her all cleaned and painted up waiting for my parts. Here s a pic of the back of my empty Vette
Good luck!
Jim
What you re experiencing could be what I experienced. I too noticed the back of my car getting squirrely under hard acceleration. Turns out the right rear trailing arm bushing was shot. I found that out by grabbing the wheel (weight of the car on the ground) at 3 o clock and 9 o clock. I was able to get a 1/4 inch of movement in/out. Further noticed when driving slow I could hear a clicking noise from that wheel.
Well, Gary Ramadie (GTR1999) has em and, as they say, nuthin money cant fix. I should get mine back this week. The right arm along with the bushing was toast...rusted out and deformed.
Got her all cleaned and painted up waiting for my parts. Here s a pic of the back of my empty Vette
Good luck!
Jim
Burning Brakes
Joined: Jun 2007
Posts: 945
Likes: 8
From: Miami FL
What kind of shape are your tires in? Cound be an internal cord damage. Consider swapping F & R and see if it makes any diffeence. You said it happens in 3rd grear under accelaration.. is it related to speed or just happends under load?
Drifting
Joined: Aug 2004
Posts: 1,354
Likes: 0
67vetteal,
What you re experiencing could be what I experienced. I too noticed the back of my car getting squirrely under hard acceleration. Turns out the right rear trailing arm bushing was shot. I found that out by grabbing the wheel (weight of the car on the ground) at 3 o clock and 9 o clock. I was able to get a 1/4 inch of movement in/out. Further noticed when driving slow I could hear a clicking noise from that wheel.
Well, Gary Ramadie (GTR1999) has em and, as they say, nuthin money cant fix. I should get mine back this week. The right arm along with the bushing was toast...rusted out and deformed.
Got her all cleaned and painted up waiting for my parts. Here s a pic of the back of my empty Vette
Good luck!
Jim
What you re experiencing could be what I experienced. I too noticed the back of my car getting squirrely under hard acceleration. Turns out the right rear trailing arm bushing was shot. I found that out by grabbing the wheel (weight of the car on the ground) at 3 o clock and 9 o clock. I was able to get a 1/4 inch of movement in/out. Further noticed when driving slow I could hear a clicking noise from that wheel.
Well, Gary Ramadie (GTR1999) has em and, as they say, nuthin money cant fix. I should get mine back this week. The right arm along with the bushing was toast...rusted out and deformed.
Got her all cleaned and painted up waiting for my parts. Here s a pic of the back of my empty Vette
Good luck!
Jim
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
Anyway, I'll stick to it and eventually we'll find the answer. I was thinking Snub failure causing Drive Shaft misalignment. Al W. PS: John, all the shims are in place as there is a Cotter Pin with the Chassis drilled.