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Topic: More vibration issues..... (Read 15412 times) previous topic - next topic

More vibration issues.....

The Sport still has a vibration in the drivetrain around 60 or so MPH. I've replaced the following...


-wheels and tires
-harmonic balancer
-differential (a total of three of them have been installed over time)
-driveshaft and u-joints (used driveshaft)
-motor mounts
-transmission (AOD to T-5)

Once the car gets to speed,and the vibration starts,I can throw the car into neutral,and the vibration is still there.I wonder if it's in the tranny?The vibration is there in any gear after a certain speed,though.I'm having the rear tires checked and balanced later and see if that's part of the problem.

On the driveshaft,the yoke up front,the ring that was on it came off.Could that be a big cause.Both driveshafts have them gone,and that made me wonder.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #1 –
That thing fell of my car in the 90's and I've been through 2 different tranny's since then. No vibration. I forgot I did have my DS balanced after it came off.

More vibration issues.....

Reply #2 –
I'm at a loss.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #3 –
Vin-You just got new wheels and tires right? did it do it with the old wheels? I'm assuming your new rolling stock was balanced before installed. Do you have that big weight thing installed on the rear? I mean at this point you're running out of options. According to your list you've tried just about everything.

More vibration issues.....

Reply #4 –
Yep,new rolling stock,and the dog bone is still on the diff.The car did have a vibration from day one,and so did the previous Bird.I agree,I am running out of options.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #5 –
Jack the rear up, pull the driveshaft off, then run the car up to 60+mph. that'll rule out the DS, rearend, or tires.
1979 Ford Fairmont
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5.0L/4R70W/8.8"/5-lug/3" Exhuast

 

More vibration issues.....

Reply #6 –
have you had the drive shaft balanced. might be worth a try.

More vibration issues.....

Reply #7 –
Vin, I have the exact same problem with my car.  It started around the time I lowered it and installed the 8.8.  I am leaning towards the driveshaft being out of balance.  Mine really gets bad around 70 mph and just gets worse the faster you go.

Do you have any good driveline shops around?  I've been thinking of dropping mine off at a local driveline specialty shop this spring and just tell them; "fix it".  lol.

Good luck...these things can make a guy go crazy! :macgun::2gunsfiri
'88 'bird, 10.9:1 306 w/TFS top end, forged rods/pistons, T-5 swap & bunch of other stuff, 1-family owned, had it since ‘98, 5.0tbrd88 on Instagram and YouTube

More vibration issues.....

Reply #8 –
OK you all are much smarter than me but is the pinion angle correct?
It really needs to be at least 3*-4* off from the tailshaft.  If it's less than 3 or aligned with the tailshaft then you'll get a vibration.

U-joints don't like to be in alignment.
Armed Forces Car Club
Eastern Sierra Chapter, California
WEB:  armedforcescarclub.com

More vibration issues.....

Reply #9 –
I'll check into the angle. As far as driveline shops,we have one,but they can straighten a driveshaft,but nor balance....so,what good is that?
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #10 –
I'm hoping the T-5 isn't having issues.It shifts fine,and there's been no sign of trouble with it,and the fluid is topped off correctly.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #11 –
I remember reading something awhile back, I believe on Corral.  Something about the tranny causing that issue.  I wish I remembered more.  Maybe search it on Corral?

sorry Vinnie.

Mike
Mike

More vibration issues.....

Reply #12 –
It's in your new wheels and tires man. Have you swapped them out for known good ones?

Quote
Jack the rear up, pull the driveshaft off, then run the car up to 60+mph. that'll rule out the DS, rearend, or tires.
I had to read that on a few times...lol Anyway, i doubt its in the engine/trans.
:america: 1988 Thunderbird Sport, Former 4.6 DOHC T56 conversion project.

Rest of the country, Welcome to Massachusettes. Enjoy your stay.

 
Halfbreed... Mango Orange Y2K Mustang GT
FRPP complete 2000 Cobra engine swap, T56 n' junk...
~John~

More vibration issues.....

Reply #13 –
my wheels and tires are still practically brand new (I bought them brand new a few months ago).As far as removing the driveshaft and running it,I can do that.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

More vibration issues.....

Reply #14 –
Just because they are new doesn't mean something isn't going on with them. If i recall you bought 10.5X17 from american raceing with the tires mounted and balanced?

Mine were out. I had the vibration. After having them re-balanced they were fine.
:america: 1988 Thunderbird Sport, Former 4.6 DOHC T56 conversion project.

Rest of the country, Welcome to Massachusettes. Enjoy your stay.

 
Halfbreed... Mango Orange Y2K Mustang GT
FRPP complete 2000 Cobra engine swap, T56 n' junk...
~John~