Author
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Topic: vibration when goin above 70
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JohnCM
CAFords OG
Member # 1076
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posted
I just bought an 88 GT.
A trim, h/c/i. stock driveshaft, 3:08's
When I acclerate after 2nd, into 3rd the shifter vibrates. I was told it could be a driveshaft, or something in the rear end?
When i put the car on a jack today, the rear tires if you pull on them they make a kinda clunking noise and move a tiny tiny bit. is that normal??
Any advice is greatly appreciated! I would love to actually floor it in this thing!
Posts: 3545 | From: Roseville | Registered: Mar 2002
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Blue Oval
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Member # 2548
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posted
did u try tightening the lug nuts?
-------------------- 65 Coupe 306, AFR's 89 Cali. Ed. Saleen "sold" BAB 89 GT 08 Yamaha R6
Posts: 2345 | From: Sacramento | Registered: Mar 2003
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JohnCM
CAFords OG
Member # 1076
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posted
Yeah, I just did that. But it didn't do anything for it.. [ February 14, 2004, 07:02 PM: Message edited by: white93 ]
Posts: 3545 | From: Roseville | Registered: Mar 2002
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onesicklx
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Member # 285
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posted
my old car vibrate a lot, so i change the stock drive shaft for a aluminum one and it stop after that...good luck...
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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JohnCM
CAFords OG
Member # 1076
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posted
Tomorrow I'll be checking U joints and transmission mount, But i think it's something to do with the rear end...
Posts: 3545 | From: Roseville | Registered: Mar 2002
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BlackNGold
CaliforniaFords.com Moderator
Member # 655
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posted
Does the car still vibrate if its in neutral at around 70mph?....
With the stock gears, my guess would be the driveshaft...
.....Does the car have a rear disc brake conversion?....
-------------------- -SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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JohnCM
CAFords OG
Member # 1076
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posted
Drum rear, And it does make the vibration when going about 70+ when in neutral..
Posts: 3545 | From: Roseville | Registered: Mar 2002
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hidnn.o.s.
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Member # 1219
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posted
ttt for ya
Like the new sn
-------------------- R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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hidnn.o.s.
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Member # 1219
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posted
quote: Originally posted by white93: When i put the car on a jack today, the rear tires if you pull on them they make a kinda clunking noise and move a tiny tiny bit. is that normal??
I believe that is completely normal.
I still think it is either the tranny mount or the driveshaft. I would toss in an aluminum driveshaft no matter what. That will help if not solve the problem.
When I drove the car home from Pacifica, the vibration wasn't near as bad when it was in neutral.
Goodluck with the problem. Hope you get it solved real soon and get the cats off and enjoy the 380 (+ -) that it will put to the wheels!
-------------------- R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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JohnCM
CAFords OG
Member # 1076
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posted
Well today I'll check U joints, I was going to put a n aluminum driveshaft in but Sacramento Mustang closed right when I got off work yesterday, then today they're closed because it's sunday.. But hopefully it'll solve the problem, Thanks for the info!
Posts: 3545 | From: Roseville | Registered: Mar 2002
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89saleen
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Member # 3083
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posted
Also check motor mounts. My mounts were cracked, wich over time made the motor/tranny shift on their mounts, making the drivetrain vibrate in the same way around 70mph. Aluminum d/s is good idea too. [ February 15, 2004, 07:21 PM: Message edited by: 89saleen ]
-------------------- Its over Johnny-
Posts: 316 | From: Palo Alto | Registered: Jul 2003
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street_illegal_stang
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Member # 1554
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posted
if it does it in neutral then its your drive shaft i gets worse after a while.it'll start clunking very bad soon when coming to stops. i had this prob with my 89 gt.replace it with a stock or alum. if you don't power shift i get the stock shaft its three times cheaper.
Posts: 1276 | From: Long Beach C.A | Registered: Jul 2002
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JohnCM
CAFords OG
Member # 1076
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posted
I bought an overpriced one from sac mustang.... Works great now!!
So did my speedo cable..
Posts: 3545 | From: Roseville | Registered: Mar 2002
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hidnn.o.s.
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Member # 1219
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posted
Clark, how does the car feel now
Glad to see you went with the driveshaft
-------------------- R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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SlowStockFox
Stock Fox
Member # 1081
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posted
quote: Originally posted by hidnn.o.s.: Clark, how does the car feel now
Glad to see you went with the driveshaft
Feels great, Driveshaft was the problem indeed.
Let me know when you're in the Sacramento area and I'll take you for a ride
-------------------- i walk around....dont drink and drive
Posts: 2957 | From: cali | Registered: Mar 2002
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