severe vibration after t5 swap

[manicmechanic007]

Damn straight, You never want poly mounts unless you are going racing and not worried about vibration
Used to run solid (steel) mounts in an old 69 Camaro. Could hardly drive the car on the street

 

[AeroCoupe]

I have urethane engine mounts, urethane transmission mount, and urethane transmission crossmember mounts and have little to no NVH in either of my cars. If it's done right i.e. balanced and aligned then you can run motor plates and drive it on the street and not have much vibration.

 

[Nicolaj]

update on the new mount?
I installed my brand new transmission and it didnt change anything. Next step for me i think i want to buy a 3rd flywheel maybe more expensive and see if that does anything and if that dont help, i will try a oem bellhousing. Let me know if it helped with that oem rubber transmission mount

 

[manicmechanic007]

Now you are getting somewhere
Check the imbalance of your flywheel and crank to make sure they match before ordering another flywheel

 

[Nicolaj]

Hey Dan
What brand flywheel did you use?

 

[Nicolaj]

Hey dan
I have finally fixed my problem. I had bought the LUK flywheel from Rockauto and it was not correct somehow. It said 28oz but when i swapped to another brand the vibration stopped. Make sure you dont have a LUK flywheel

 

[manicmechanic007]

I thought that all along
It took a long time getting there
post 76

 

[Mustang5L5]

He's not the original poster who started the thread.

That mystery still remains open.

 

[manicmechanic007]

I hate that (losing track)
The mystery
Some of those mysteries are good
We had a Taurus under base warranty, not my ticket but we all got involved. It vibrated so bad at freeway speed; it would shake your fillings out. They did everything, balanced the tires, replaced the CV joints and wheel bearings, they even had the trans guy R&R the trans and replace the final drive bearings. That's when they gave it to me (the alignment guy). I drove it and told the tech to balance the tires again. He squawked but we both went and did it. The LF tire was only .25 oz. out of balance. I told him to spin it again, it was 4 ounces out, we spun it again and it was 3 ounces out. I told him to break down the tire and lets see. Damn thing was full of three cans of fix a flat.

 

[Dan_Fish_Pro]

Been down for a while, problem still there. Glad Nicolaj got problem fixed with new flywheel. That's not my problem since I never changed flywheel and no vibration with old flywheel and tranny removed

​

 

[Dan_Fish_Pro]

I guess my issue is still alignment and no one in southern ohio knows anything about alignment, I'm stuck.

 

[AeroCoupe]

Give the guys at Modern Driveline a call.

Transmission Conversions | TREMEC Solutions & Kits | Modern Driveline

Modern Driveline specializes in 5 speed and 6 speed transmission conversion kits for Ford, Chevrolet and Mopar applications.

www.moderndriveline.com

 

[Dan_Fish_Pro]

I did call MDL, they said tranny touching frame someplace. I enlarged shiffter hole and checked all around, still vibrates

 

[Dan_Fish_Pro]

I'll call MDL again

 

[Nicolaj]

Hey Dan
After 2-3 months of research and maybe 20 emails to MDL I have found out the many things that could cause this. You still never replied to me if it helped when you jacked up the rear of the transmission. Did you make sure the transmission mount bolts is not touching the transmission crossmember? Also like other people suggested i had my transmission out and painted the whole tunnel and then mounted the trans back into the car. Only to take it out once again and look if the transmission had scraped off any of the fresh paint.

 

[Dan_Fish_Pro]

Nicolaj: I replaced poly tranny mount with rubber mount, no difference. getting ready to try new motor mounts. can't find any place tranny touching frame or body even after enlarging shifter hole. If motor mounts don't help, will pull tranny again to see if mechanic was right about no vibration with tranny removed. A friend has another t5 I could stick back in just to make sure tranny is good​