5speed vibration

[1badcougar]

Since I have done the 5speed conversion, I have a vibration. I had used my stock aod driveshaft. I have changed driveshafts and still have a vibration. Is the tranny mount the sames for the aod & 5speed? Is it possible that the bushings in the rear control arms are bad enough to give this vibration? If someone else who done the 5speed conversion had this problem, what did you do to get rid of the vibration? This is an everyday driver with a stock motor & 3.73 gears. Your help will be greatly appreciated.

 

[speedytang]

This won't be a help, but I changed flywheel and clutch-pressure plate and installed a new transmission on Friday and I have a bad vibration also when in idle and above. I installed a adjustable transmission mount that I have not welded yet so I hope that is what I am feeling if not I will need to take everything apart again and look everything over.

 

[Curse]

Same thing here. I used a aluminum D/S and a poly tranny mount, its not bad but I do feel it more than when my car was an auto.

 

[speedytang]

If your car is vibrating when moving only not just revving in idle you need to rotate the driveshaft to put the drivetrain in sync. Unbolt the driveshaft and turn it 180 degrees.

 

[1badcougar]

I have fixed my vibration last night. I was working on rotating the driveshaft 90 degrees and seen the u-joint had some play in it. I have replaced the u-joint and knocked the balancer ring off the tranny yoke. Installed the driveshaft by rotating it 90 degrees from where I had it installed. Took the car for a ride and didn't have a vibration. If I now have any vibration, it is very minor that I haven't noticed. I really appreciate all your help.

 

[mpswirl]

Just to add to the posts i had a vibration about 80+, i replaced the driveshaft with an aluminum one, replaced the tires and it didnt fix it. Then i finally changed the tailshaft bushing that the driveshaft rides on in the tranny(t-5) and it went away.