North American Turbocoupe Organization



vibration?
Harvs Offline
Senior Member
#1
I still can't figure out why my car shakes like crazy. Its something in driveline, I dont know if my shaft is out of shape or what. but at high speeds it shakes a real lot. Also could it be something in my tranny or gears?
Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.
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piper Offline
Junior Member
#2
Quote:Originally posted by Harvs:
I still can't figure out why my car shakes like crazy. Its something in driveline, I dont know if my shaft is out of shape or what. but at high speeds it shakes a real lot. Also could it be something in my tranny or gears?

how about the tires. one or more could be out of balance.
1986 T-Bird TurboCoupe(Sold after 19 years of ownership)
Motivation for a signature is currently being reviewed
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Dan E Offline
Posting Freak
#3
Have you ever had the driveshaft off ? Maybe it's off 180 degrees or one of the balance weights on it fell off.
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...
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Walsted Offline
Posting Freak
#4
When I first got my 86, the rear end was so worn that the limited slip didn't limit the slip at all, and the car vibrated a lot as speed increased. I swiched out fluid and wheel bearings to no avail. Finally, I switched to an 8.8 out of an '87, and the vibration went away, and it doesn't slip as much. The current rear could use a new clutch pack, as well as a few other things, but I am going to wait until I get new tires for that.

Anyway, I haven't heard of an 8.8 rear being worn to the point of vibrating, but that doesn't mean it isn't possible, especially if you are having problems with your limited slip.

There was also vibration from a loose driveshaft when I got the car, but a few minutes under the car with a 12mm 12point box end wrench fixed that problem.

I have also had vibration problems with a different car when water got in a wheel from an air compressor.

Hope this helps.

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Mike Walsted - NATO member
1986 5-speed TurboCoupe and 1985 5-speed XR7
Mike Walsted - Sold my 1986 5-speed TurboCoupe
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Noname
Guest
#5
Hey Dan, what do you mean by that? "It could be off by 180 degrees." Do you mean if you take it off, you have to put it exactly how it came off? Like the way the bolt holes came off, have to go back up? When I took the driveshaft out to do a clutch, I never knew it had to go back up the same way...

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1988 TurboCoupe - 5 Speed - 115k miles - Fully Loaded except Leather
5"x8" K&N in fenderwell, SVO T3 watercooled .63/.60 A/R, Gillis Valve @ 18 psi, HKS Super Sequential BOV, Walbro 255 HP Fuel Pump, Kirban AFPR, Bob's Big Log Header, 3" DP, No Cat, Dual 2.5" UltraFlos into ATR SS axle/tailpipes, Centerforce Dual Friction Clutch, Pro 5.0 Shifter, Koni Adjustable Struts, KYB Gas-A-Just Rear Shocks and Quads, Custom Progressive Rate 1" Lowering Springs, M.M. C/C Plates, Energy Suspension Parts Everywhere, PST Ball Joints/Tie Rod Ends, Autometer Boost/Vac & Air/Fuel Gauges
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Kev Offline
Posting Freak
#6
I had the same vibration thing going on from the bolts going to the rear end being loose. Tightened them up and all was well. Put a little thread lock on them while you are under there so it doesn't happen again.
Kev
1988 TC 5spd
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Dan E Offline
Posting Freak
#7
Quote:Originally posted by dm22:
Hey Dan, what do you mean by that? "It could be off by 180 degrees." Do you mean if you take it off, you have to put it exactly how it came off? Like the way the bolt holes came off, have to go back up? When I took the driveshaft out to do a clutch, I never knew it had to go back up the same way...

Yep...supposedly it's supposed to go back on the same way.

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Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !

http://www.geocities.com/wot_turbo/WOT.html

NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...
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