Brain storming needed.

RODZ aka- Rodney Tweed

191 posts · joined Dec 2010 · 12 Dec 2012, 9:05 pm

#935414

Hi guys,

I have a voilent drive train vibration in my 66 beetle from top of 2nd gear into 3rd and then can be driven out. almost happens everytime approx 30mile/hour

it does not have it from take off or at highway speeds.

vehicle is lowered, and i have checked all obvious stuff.

cannot see any eggs etc in tyre, all engine and gear box mounts look good and fulcrum plates seem to be engaging etc.

no obvious knocks or noise's.

looking for brainstorming to help me find issue?

"If it ain't rubbing,It ain't dubbing!!!!"

1966 Beetle
1969 Low Light Kombi

barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 · 12 Dec 2012, 9:06 pm

#935415

hows the wheel balance?

“We all pay for life with death, so everything in between should be free.” Bill Hicks
the chaos project - click me

RODZ aka- Rodney Tweed

191 posts · joined Dec 2010 · 12 Dec 2012, 9:11 pm

#935416

Thanks Barls, i thought about wheel balance and checked the wheels for eggs etc. but the vibration is really specific on when it comes in and goes.

comes in around 25mph and goes about 30ish mph. no other ranges.

I will prob try another set of wheels on it to proof not in wheels just in case.

"If it ain't rubbing,It ain't dubbing!!!!"

1966 Beetle
1969 Low Light Kombi

barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 · 12 Dec 2012, 9:33 pm

#935418

have had one on the corolla we had that it spat a weight and was almost undrivable at a set range but was fine ether side of it.

“We all pay for life with death, so everything in between should be free.” Bill Hicks
the chaos project - click me

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 · 13 Dec 2012, 12:38 pm

#935463

yeah i say its wheel balance, you can get a resonance at certain speeds.

I have experienced this before on a few occasions, in my case was also exacerbated by shot suspension bushes.

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

Allbones Officially Full-On Dubber

395 posts · joined Jul 2012 · 13 Dec 2012, 12:42 pm

#935464

RODZ wrote:Thanks Barls, i thought about wheel balance and checked the wheels for eggs etc. but the vibration is really specific on when it comes in and goes.

comes in around 25mph and goes about 30ish mph. no other ranges.

I will prob try another set of wheels on it to proof not in wheels just in case.

3rd for balance, coming from a 4x4 background, I would throw weights in the bush all the time, driving home you would get random shakes at varying speeds, was usually wheel balance issues.

OZ Towdster Keen to finish some projects

1,921 posts · joined Dec 2003 · 13 Dec 2012, 2:23 pm

#935470

Try just refitting the wheels in a different orientation to each drum being carefull to try and centre them on the wheel bolts as you do them up

Don't let body work get in the way of real suspension travel

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 13 Dec 2012, 5:05 pm

#935490

dont over tighten the wheel bolts as this will distort the brake drum

the early 5 stud drums are very flexiable and will distort out of round

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 · 14 Dec 2012, 1:17 pm

#935581

also tighten in steps of torque and correct pattern.

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE