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Wheel hopping
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 11:18 am    Post subject: Wheel hopping Reply with quote

Took the car out lastnight after putting the rear end back together. Feel like a basketball goin down the road now.
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Dewey316
The Lama


Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 2:51 pm    Post subject: Reply with quote

is it hopping all the time? Tires?
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QwkTrip
11sec Club


Joined: 17 Feb 2004
Posts: 3942
Location: Peoria, IL

1989 Pontiac Firebird

PostPosted: Fri Jan 28, 2011 5:05 pm    Post subject: Reply with quote

I'll bet you put the tires on upside down. Rotate them 180 degrees.



Wink
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 5:07 pm    Post subject: Reply with quote

Is that possible?

Someone said it could be the busing to the torque arm.
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QwkTrip
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Joined: 17 Feb 2004
Posts: 3942
Location: Peoria, IL

1989 Pontiac Firebird

PostPosted: Fri Jan 28, 2011 5:48 pm    Post subject: Reply with quote

No, please don't go turn your tires. I was just messing with you. Laughing

Seriously though, I wouldn't drive it until you get the problem sorted out. Severe vibration causes parts to wear out or break FAST!
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Dewey316
The Lama


Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 6:33 pm    Post subject: Reply with quote

nonsensekid20 wrote:
Someone said it could be the busing to the torque arm.


When the TA bushing goes bad, you normally will hear a loud THUD from under the car, when you take off from the line, or hit the brakes. That doesn't sound like "hopping" as you described it.

A little more detail will help us all, let us know what it is actually doing. Is it hopping all the time? at a certain speed? when you leave the line? everytime you shift? Also, it is making an audable noise, or just vibration? things like that will help us, try to give you some valid ideas of what might be going on.

If you could also include, what you actually did work wise? What did you put back together in the rear end? Did you put the housing back in? rebuild? new posi unit? new gears? new brakes?

--John
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TurdGen1989
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Joined: 30 Aug 2009
Posts: 472
Location: Roseburg,OR


PostPosted: Fri Jan 28, 2011 6:44 pm    Post subject: Reply with quote

I have the THUD.. sounds like line lock or have slicks on it or something lol
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 7:49 pm    Post subject: Reply with quote

Just when you accelerate is when I felt it. Both off the line and from a roll.

All I did in the rear end was clean off the magnet and change the fluid.
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RK82
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Joined: 27 Jul 2008
Posts: 168
Location: vancouver B.C

1982 Pontiac Trans Am

PostPosted: Fri Jan 28, 2011 9:18 pm    Post subject: Reply with quote

is it a posi or limited slip? did you add friction modifier to the fluid?
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Fri Jan 28, 2011 9:29 pm    Post subject: Reply with quote

open differential. and no i didn't.
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RK82
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Joined: 27 Jul 2008
Posts: 168
Location: vancouver B.C

1982 Pontiac Trans Am

PostPosted: Fri Jan 28, 2011 10:22 pm    Post subject: Reply with quote

nonsensekid20 wrote:
open differential. and no i didn't.


well in that case you don't need it, check your tires one could be separated but normally that would make it bounce all the time.
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iansane
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Joined: 16 Jan 2004
Posts: 5742
Location: Bothell

1991 Pontiac Trans Am

PostPosted: Fri Jan 28, 2011 10:38 pm    Post subject: Reply with quote

nonsensekid20 wrote:
Just when you accelerate is when I felt it. Both off the line and from a roll.


How old is the transmission mount?

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BigDaddyVu
12sec Club


Joined: 31 Jan 2004
Posts: 1118
Location: Spokane, Wa

1986 Chevrolet Camaro Z/28

PostPosted: Sat Jan 29, 2011 9:45 am    Post subject: Reply with quote

I've distroyed 3 tranny mounts. It was funny that the stick shift comes up.
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nonsensekid20
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Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Sat Jan 29, 2011 10:54 pm    Post subject: Reply with quote

As old as the car. I never replaced it. Doubt the guy before me did.

But the shifter doesn't come up or anything.
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blue89
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Joined: 23 May 2006
Posts: 3482
Location: Bellingham/Eugene

1986 Chevrolet Camaro RS

PostPosted: Sat Jan 29, 2011 10:58 pm    Post subject: Reply with quote

Have you lowered the car and by how much? I don't remember if you mentioned you have a lower control arm adjuster brackets.
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86 RS - 7.4L V8 SOLD
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun Jan 30, 2011 7:12 am    Post subject: Reply with quote

*just my two cents (worth what you paid for it)*

You guys are over-thinking this. The kid messed something up while he was under there; jacked in the wrong place and bent something, didn't put enough diff oil in, put the wrong oil in, springs didn't get reseated, whatever.

Need to go back and retrace your steps. Replacing the diff oil isn't going to blow out a trans mount, or cause a problem with LCA's to suddenly appear.
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RSFreak
The other "John"


Joined: 23 Jan 2004
Posts: 2946
Location: Renton

1989 Chevrolet Camaro RS

PostPosted: Sun Jan 30, 2011 11:31 am    Post subject: Reply with quote

I guy who helped me swap a clutch once forgot to reattach the torque arm on my RS. As I drove slowly down the driveway, the car kinda hopped along. My money is on your torque arm not being attached properly. Wink
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'86 Trans Am - 5.0L TPI - LT1 cam - 700R4 - WS6
'85 Camaro Berlinetta - IROC clone
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nonsensekid20
Member


Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Sun Jan 30, 2011 12:29 pm    Post subject: Reply with quote

I never lowered the car. But the previous owner could have. It looks lower than stock.

I had to replace the panhard bar because it was bent. Whats the bar that attaches above the panhard? if thats bent too could that make it do what its doing?

And I got the car for free. Laughing
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nonsensekid20
Member


Joined: 30 Sep 2010
Posts: 490


1991 Chevrolet Camaro RS

PostPosted: Sun Jan 30, 2011 12:30 pm    Post subject: Reply with quote

So when I put the torque arm back on after the swap, does it need to be adjusted?
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RSFreak
The other "John"


Joined: 23 Jan 2004
Posts: 2946
Location: Renton

1989 Chevrolet Camaro RS

PostPosted: Sun Jan 30, 2011 12:40 pm    Post subject: Reply with quote

No. Just make sure it is attached properly to the trans mount.
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'86 Trans Am - 5.0L TPI - LT1 cam - 700R4 - WS6
'85 Camaro Berlinetta - IROC clone
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