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bluntlunchbox
Samba Member
Joined: June 06, 2007
Posts: 330
Location: San Diego, CA
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 Posted: Tue Jan 18, 2011 8:48 am Post subject: drivetrain noise? |
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| Hey guys, yes I searched but not sure I was on the right track. I hear a noise when I'm going from coasting to rolling back onto the throttle. Once I'm accelerating it goes away but its a rubbing or light grinding from the back wheels or tranny. Is it a wheel bearing or am I looking at a trans problem? Oh and it's a '66. |
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decobugma07
Samba Member
Joined: May 03, 2005
Posts: 1049
Location: Newtonville, MA
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Cugel
Samba Member
Joined: June 09, 2010
Posts: 53
Location: San Francisco
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| Posted: Tue Jan 18, 2011 9:25 am Post subject: |
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You might check your rear brake drum splines. I had a similar noise as yours on my '61, and eventually the rear axle of one side spun the splines out of the cheap Brazilian made brake drum. It had been making a sort of rubbing noise that eventually became an awful grinding, and finally failed at a stop sign when I tried to go again. If the brake drum(s) are wobbly or do not fit well on the axles, then that's probably the culprit.
This may not be your problem, but if it is, it's an easy fix: buy a new brake drum and install. But buy a German one! |
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bluntlunchbox
Samba Member
Joined: June 06, 2007
Posts: 330
Location: San Diego, CA
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| Posted: Tue Jan 18, 2011 1:02 pm Post subject: |
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10-4! I'll check that first. Thanks for the response  |
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Tue Jan 18, 2011 1:25 pm Post subject: |
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If it's one wheel bearing or drum problem, you should be able to hear the noise change when you swerve the car side to side, or make a full rolling turn right or left.
If it doesn't change, it would be more likely in the trans.
_________________
-Bruce
An ounce of prevention is worth a pound of cure. |
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Hakka
Samba Member
Joined: November 21, 2004
Posts: 620
Location: PNW or Norway
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| Posted: Tue Jan 18, 2011 1:35 pm Post subject: |
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Where is your trans. fluid level at?
Is this your first time running the car in colder weather? I realize you are in San Diego...but it is cooler there than summer I am sure. |
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j8bug
Samba Member
Joined: September 26, 2008
Posts: 1700
Location: When we were all (213) Los-Angeles
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| Posted: Tue Jan 18, 2011 6:34 pm Post subject: |
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If the car is new to you, you might want to check if a solid mid-mount was ever installed. My tranny was nice and quiet, until i installed a solid mid-mount. now i hear all kinds of noises including the ones you mentioned... That was 8 years ago. you never get used to it  |
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bluntlunchbox
Samba Member
Joined: June 06, 2007
Posts: 330
Location: San Diego, CA
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| Posted: Tue Jan 18, 2011 9:24 pm Post subject: |
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| Sprø Norsk wrote: |
Where is your trans. fluid level at?
Is this your first time running the car in colder weather? I realize you are in San Diego...but it is cooler there than summer I am sure. |
Yeah it's not too cold here in San Diego, about 50 degrees at night, 70 something during the day. I'll check tranny fluid too.
@ j8bug: I don't believe the tranny mount is solid, I've heard they're noisy. It only makes the noise when the accelerator just starts to be pressed. I hear it most while lightly cruising in fourth. |
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Tue Jan 18, 2011 10:14 pm Post subject: |
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| bluntlunchbox wrote: |
| It only makes the noise when the accelerator just starts to be pressed. I hear it most while lightly cruising in fourth. |
The mainshaft bearing in the trans can make this kind of noise when it's going bad. They kind of "sing" if you will.
A wheel bearing typically makes the same general noise on accel or coast, getting louder and louder with speed.
Drain the trans oil in a spotlessly clean or new steel drain pan, and look for metal particles. Look at the drain plugs for a shards of steel. If there are none larger than say finely ground black pepper, then just re-fill and drive it.
If it gets worse, or starts to pop out of gear, then you'll have to consider a trans exchange or OH.
_________________
-Bruce
An ounce of prevention is worth a pound of cure. |
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