My Chevelle shakes

[Jeff 67]

Hi, I'm new to your Chevelle forum. I have a 1967 SS 4 speed 396 and when I go over 60 MPH my stick shift shakes, real bad. I need to slow down ,then things are ok again. I had the front end look at and all was ok. Could it be the drive shaft ? or maybe the clutch ? I need help. I just do not want to keep putting money into something that does not work .

Thank you Jeff 67:mad:

[Ms Grumpy]

Welcome Jeff. You ask if it could be a few different things. I think it might help if you give a little more information. What is new, used, or you don't know. I am sure you will get some help on solving your problem. Good Luck.

[FlintTony]

Jeff, the first thing that I would check is the bolts that mount the shifter to the mounting plate and the bolts for the mounting plate that go into the transmission.

[Jeff 67]

Hello thanks for getting back so fast to me. All the bolts on the shifter are good and tight. I just had the alignment done as well

[fleming23]

Is it any speed over 60 or if you speed up to say 65 or 70 does it stop?

When is the last time you checked or replaced the u-joints in the drive-shaft?

[shadowgray396]

Is it any speed over 60 or if you speed up to say 65 or 70 does it stop?

When is the last time you checked or replaced the u-joints in the drive-shaft?

X2, that would be my guess, or out of balance drive line

[FlintTony]

Is the shifter the only thing that vibrates or shakes? How is the trans mount? Tight and not broken?

[Jeff 67]

Hello,, my car starts to shake around 55 mph ,the faster I go the more it shakes. I have not check the u-joints, but it does not shake or vibrate under 55 mph. The faster I go the hole car starts to shake.

[BillsCamino]

Do you also feel vibration in your seat or at the steering wheel?
Could be something as simple as a tire out of balance...

If it's only at the shifter...have the u-joints replaced AND get the driveshaft re-balanced. A local driveshaft service shop here only charges $70 for all that.

Something I ALWAYS have done on any of my project cars.

While your under there pulling the shaft...take a good look at the tranny mount to be sure it's not unbolted, broken or the rubber aged.

[carpoor]

Be sure of the transmission mount. Some of these replacement mounts aren't 100% correct and can affect driveline angle just enough to throw things off. However, the driveshaft was my first thought when reading this. Then I wondered to myself weather or not you had a polyurethane transmission mount.

HTH

[Jeff 67]

thank you all for the help. I will let you know what is going on. I will be taking into the shop .

Jeff