Not a Good Vibration ;-(

Wondering were my Vibration is coming from between 700-950 RPM .. I can feel it thru the floor only at that range ...is it driveshaft, muffler ???

 

is when your driving or just sitting still?

 

Both .............

 

Have you checked the motor/tranny mounts?

 

Then it is not likely a drive shaft.

 

yes on the motor mount ..not the trans..tks

 

Then that aught to cancel out the drive shaft. What kind of car? Auto or stick?

 

Auto ...............

 

Have you changed anything recently? Is your dampner coming apart?

 

did it just start to happen or has the motor been in the car for awhile

 

Have you changed anything recently? Is your dampner coming apart?

NOPE

did it just start to happen or has the motor been in the car for awhile

JUST STARTED AFTER CAR HAS BEEN SITTING FOR 4 YRS ..MOTOR BEEN IN CAR 10 PLUS YRS

 

Check the usual suspects, motor and trans mounts, harmonic damper. If it appears to be nothing, it might be. Sometimes you just get a vibration for some unknown reason, a certain harmonic gets to the car. My 98 Mustang does it

 

check exhaust tubes probly rubbing somewhere- a mount, collector @ the headpipe or somthing could have come loose, this is the most likely

 

Strange vibration when parked, is it the driveshaft?

Look at the dead bird, no not up in the sky, on the GROUND.

 

If the car sat for 4 years and it only does it at 700-950 RPM, maybe it's just running rough and needs a carb rebuild.

 

*Ding, ding, ding*....winner, winner, chicken dinner.....

The poor old car has been sitting and needs some tune-up "lovin".....

 

Sorry ..Not the Carb.. The carb was replaced with new plugs a few months ago ..Next !!!

 

Bad gasoline

 

Nope .. Drained the gas and changed fuel filter ... when I chnaged the carb

FYI ..Just got back from 425 mile road trip ran great on the hwy ...close to 20 mpg for a BBC

 

Bearing on the Johnson Rod out of balance?

 

Is there any more info you can give us on the car, like what kind it is?

 

1936 dodge 5w/ coupe-427/350 trans

 

Groovy. Did it do it with the old carb too? What kind was on it previously and whats on it now? Is it rebuilt or new?

 

Advance weights / mechanism stuck, binding.............check in there.

 

It might be easier if you told everybody what you did to your vehicle before you went on your 425 mile trip. Did the vibration start after your trip or did start after sitting for 4 years.

 

loose nut behind the wheel?

 

.Did it do it with the old carb too? ..NO

What kind was on it previously and whats on it now?.. Edelbrock 600 prev and new

Is it rebuilt or new? NEW

 

just stay above those rpms and run the shit out of it!

 

Before the trip

 

Did you forget some zeros? You might have a problem if it was 7000-9500 rpm. Put in a bigger cam so it will have more vibration, its a Hot Rod not a Rolls Royce!! Then again you could change out that cracked flexplate ( only a guess ) good luck.