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Username Post: Vibration        (Topic#351959)
Airlifter 
"3rd Year" Gold Supporting Member
Posts: 512
Airlifter
Age: 73
Loc: Tazewell county, Virginia
Reg: 06-07-15
07-10-18 10:51 AM - Post#2739570    

After the ordeal with the Okie bushing I still have a vibration at 60+ mph. I am pretty sure that it is not in the drive line because when I put the transmission in neutral the vibration goes away. I guess that leaves the engine and transmission. Is there some way to isolate where it is coming from.

I really wanted to keep the car mostly stock and I already have a lot of time and money invested but if I can't find the problem I might start looking for sbc engine start over.

Sorry for the rant and any help and advice appreciated. Pete

1951 styline deluxe sport coupe w/54 engine & powerglide


 

Chevs of the 40s

raycow 
Honored Member
Posts: 27878
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-10-18 11:45 AM - Post#2739577    
    In response to Airlifter

Do you get the vibration when you rev the engine with the car standing still?

If yes, did you do anything to the clutch or flywheel when the driveline was apart? Even if you didn't replace anything, did you remove the pressure plate from the flywheel? If yes, did you check for matching punch marks before bolting the pressure plate back on?

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Airlifter 
"3rd Year" Gold Supporting Member
Posts: 512
Airlifter
Age: 73
Loc: Tazewell county, Virginia
Reg: 06-07-15
07-10-18 03:59 PM - Post#2739606    
    In response to raycow

I can't really tell if there is a vibration when I just rev the engine. What I can feel is a little vibration when I put the car in drive. I had felt this before but I thought that it was a problem with the tuning. Carb, ignition etc.

I installed the flex plate to the torque convertor after the engine and transmission was rebuilt. If I remember correctly it was pretty fool proof because of the bolt pattern. I have been driving the car for about a year and a half on and off. About 800 miles.

I didn't notice the vibration until after I changed the rear transmission mount. I replaced the Okie bushing and the Universal joint. That took care of some of the vibration.

1951 styline deluxe sport coupe w/54 engine & powerglide


 
raycow 
Honored Member
Posts: 27878
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-11-18 12:39 AM - Post#2739653    
    In response to Airlifter

Sorry, I missed seeing the part about it being a PG. If you feel the vibration only after you put the trans in gear, it's unlikely that you have a balance issue. It sounds like engine roughness, which gets you back to carburetion or ignition again.

My suggestion would be to just drive the car for a while and see if the roughness gets any worse.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Airlifter 
"3rd Year" Gold Supporting Member
Posts: 512
Airlifter
Age: 73
Loc: Tazewell county, Virginia
Reg: 06-07-15
07-11-18 04:17 AM - Post#2739665    
    In response to raycow

  • raycow Said:
Sorry, I missed seeing the part about it being a PG. If you feel the vibration only after you put the trans in gear, it's unlikely that you have a balance issue. It sounds like engine roughness, which gets you back to carburation or ignition again.

My suggestion would be to just drive the car for a while and see if the roughness gets any worse.

Thanks, that is the plan for now.

Ray




1951 styline deluxe sport coupe w/54 engine & powerglide


 
Airlifter 
"3rd Year" Gold Supporting Member
Posts: 512
Airlifter
Age: 73
Loc: Tazewell county, Virginia
Reg: 06-07-15
07-13-18 11:40 AM - Post#2739874    
    In response to Airlifter

How warm should the ball joint cover and the housing over the u-joint be. About an hour after a drive I was under the car trying to locate the transmission leaks. I laid my and on the torque tube and it seemed pretty warm. The u-joint housing was even hotter. I checked with an infrared sensor and the tempt was 93 at the torque tube and 132 at the u-joint housing.

Is this about normal?

1951 styline deluxe sport coupe w/54 engine & powerglide


 
one4dad 
"5th Year" Silver Supporting Member
Posts: 1455
one4dad
Age: 75
Loc: Baton Rouge La
Reg: 01-17-10
07-13-18 01:49 PM - Post#2739890    
    In response to Airlifter

Did you put transmission fluid in the ball area after reinstalling. You insert fluid thru the speedometer connection. I don't know exact quantity, Just a thought

Bill Wilson 50 styleline deluxe 2 door sold,- 51 styleline Deluxe 2 door ,'56 235 with dual carter webers on an Offenhauser intake, Fenton headers, 56 chevy rear end and 700R4 transmission.


 
Airlifter 
"3rd Year" Gold Supporting Member
Posts: 512
Airlifter
Age: 73
Loc: Tazewell county, Virginia
Reg: 06-07-15
07-13-18 02:48 PM - Post#2739900    
    In response to one4dad

Should of put that in the post. Yes, I put about a pint of trans. fluid through the speedo cable hole. I also checked to make sure that oil was entering the chamber by running the engine with the transmission in neutral with the cover off.
We ran the car several minutes after we buttoned up everything.

1951 styline deluxe sport coupe w/54 engine & powerglide


 

Chevs of the 40s

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