Is there a Technical forum??

[hdl261olds]

I have a friend who is just putting the finishing touches on 1987 .

He is having a terrible time with vibrations, 5.0 eng / C-4 trans , sitting still.

The engine runs perfect without the torque converter, (third one).

Attach the torque converter and will shake your teeth.

Any ideas?? I will gather more info and post it but I thot

someone may have experienced this before.

Thanx, Dave

Pix are of my two 1961 Olds, I am too old to start a Mustang project

so I enjoy my friends who have them.

[49328]

I have a 79 Cobra (5.0) and we replaced the engine with a 88 HO one. Had terrible vibration. Finally replaced the flywheel with an HO one and no more vibration (original C-4 trans)

[CW4macret]

How did you get it runing with out the TQ installed? There are a couple of possable items that can cause what you are seeing. Does this happen in Park or only the driving gears? Will the car move under power?

[hdl261olds]

Thanx for the help.

I did some research and found that you cannot use the OEM flexplates with an internally balanced engine.

The 28 or 50 weight throws it out of balance.

We ordered the B&M # 50246 - 10 1/2 " flexplate made especially for balanced engines with the

C-4 tranny

Thanx again, Dave