Need HELP after trans swap...

[zx3focus]

I did the t3650 swap into my 97 cobra and I love the trans and the new clutch. But there one problem. I noticed today that at around 2,000rpm it has a vibration to it. I think it may be the the clutch/flywheel but I am not sure. I used a flywheel that looked good and had about 19000 miles on it. I didnt get it resurface, I just used sand paper and got the glaze off of it. Also I put the driveshaft back in the holes where it had been the last 9 years. The vibration is bad because it right about 65-70mph in 5th. And it is enough to numb your legs. Also it is not constant. It is like a humming that comes and goes consistantly about every 5 seconds when I am cruising at around 70. Any ideas??? THANKS

 

[Superhereaux]

what happens when you're going 65-70 and you push the clutch in?

 

[zx3focus]

still vibrates...but I get a similar vibration when the car is not rolling and I rev it to 2 grand. So it may be a bit of both. But i am not sure. I was going to index the d/s today I can clearly see where it was from the factory.

 

[Superhereaux]

did you use a star pattern when you torqued down the flywheel?

proper torque specs?

 

[zx3focus]

yes and yes.

 

[mity2]

Did you tighten driveshaft right? Our driveshaft is bit of pain to torque down evenly.

 

[zx3focus]

Did you tighten driveshaft right? Our driveshaft is bit of pain to torque down evenly.

probably not, how are you supposed to do it???

 

[mity2]

its just hard, because you have to lock tires to tighten 1 bolts, unlock your tire, spin the shaft, and lock it then tigten. its bit time consuming. So sometimes people don't do it right

 

[BennyBlown2v]

We did that. It's probably the flywheel not being resurfaced I'm guessing. I'll go for a ride and see if I can feel where its coming from... btw did you ever re-torque that right front wheel???

 

[zx3focus]

yes.^^^lol And yeah I did the d/s like you said. You have to do it like that or it will just spin?

 

[Superhereaux]

I get a similar vibration when the car is not rolling and I rev it to 2 grand.

i would think this would rule out the d/s

 

[zx3focus]

I think so yeah.

 

[zx3focus]

the vibration feels like iti scoming from the rear but could it be that the flywheel bolts are coming loose, or that the flywheel needs resurfaced???