

| Subject: | Re: Transmission Noise ? |
| From: | Scott Daniel - Turbovans |
| Date: | Mon, 29 Dec 2008 16:38:53 -0800 |
you make a little stick that will fit between the driver's seat and gas pedal, and try set the rpm to about 2,000. or you jam a small stick or piece of wood under the throttle return screw on the throttle body. - or a helper with a steady foot. ----- Original Message ----- From: "Walter Houle" <whoule@ecscontrols.com> To: "Scott Daniel - Turbovans" <scottdaniel@turbovans.com> Cc: <vanagon@GERRY.VANAGON.COM> Sent: Monday, December 29, 2008 4:07 PM Subject: Re: Transmission Noise ? >I did it with both sides up on stands too, but I didn't have the stones to >lean in there with a piece of wood! I stayed in the drivers seat with my >head out the window. > > I'll try it again with a helper this time. > > Thanks > Sent from my iPhone > > On Dec 29, 2008, at 3:52 PM, "Scott Daniel - Turbovans" > <scottdaniel@turbovans.com > > wrote: > >> Daryl did chime in, >> he said he rarely sees ring gear bearings being bad.......... >> ( ok, 'final drive bearings' ) >> I agree........but I've sure seen a lot of bad ring and pinion GEARS >> ...... >> and those can make noise I'd think. >> Run it in the air at about 35 mph, on very solid safe jackstands, >> and put your listening rod on the bell housing area of the trans. >> Make the engine go at a steady speed , not varying. >> >> and why are you sure it's not in the front of the van ??? >> we'll get it. >> and actually............you'll see, in the end, that it falls under the >> famous saying : >> "it's just a blockage or leakage of fluids or electrons." >> >> a failed bearing or gear falls under the 'blockage or leakage of >> fluids.' >> Almost Every failure falls under this too - blockage or leakage of >> fluids or electrons. >> even a flat tire. >> and there are a few people that don't realize 'fluids' include gases, >> not just liquids. >> 'cracked windshield...........I suppose that doesn't fit under 'leakage >> or blockage come to think of it.......but most failures to. >> anyway............ >> run 'er in the air ! >> just be very careful. Solid jack stands and a hard level floor are >> imperative. >> Scott >> turbovans. >> >> ----- Original Message ----- From: "Walter Houle" <whoule@ECSCONTROLS.COM >> > >> To: <vanagon@GERRY.VANAGON.COM> >> Sent: Monday, December 29, 2008 3:22 PM >> Subject: Re: Transmission Noise ? >> >> >>> On the gas, off the gas, uphill, downhil, it doesn't seem to matter. >>> The noise stays the same. It sounds well, like a worn bearing. Kind of >>> like a low frequency hum. It's as loud as the engine is at 35 mph and >>> it goes thru harmonics with the engine as the RPMs change. >>> >>> Sent from my iPhone >>> >>> On Dec 29, 2008, at 3:00 PM, "Scott Daniel - Turbovans" >>> <scottdaniel@turbovans.com >>> > wrote: >>> >>>> hi, >>>> I'm thinking of R & P more now all the time. >>>> yes, it turns anytime the rear wheels are turning. >>>> regardless of clutch in, cluch out, in gear, neutral, or engine >>>> running. >>>> The ring gear turns with the rear wheels, the pinon gear is >>>> constantly engaged with the ring gear. >>>> >>>> ok......does the sound vary whether you are on, or off, the gas, or >>>> 'neutral pressure' on the gears ? >>>> >>>> I have an 87 Wolfsburg ........248,000 miles on the odo. it was >>>> noisy in all gears. >>>> noticeable from 30 mph up. >>>> I would describe that as 'bearing noise' and not 'dronning.' >>>> >>>> Darryl.......plase comment - on this guy's situation. >>>> >>>> btw, the ring and pinion can be seen just be removing the bell >>>> housing....... >>>> which means engine out or trans out. >>>> one trans shop I go to ............once the R & P is shot, the whole >>>> care value of the trans is zip. >>>> >>>> drive alongside a wall, like on an overpass if you can find one, >>>> trying to isolate it to left or right, front or back. >>>> scott >>>> turbovans >>>> ----- Original Message ----- From: "Walter Houle" >>>> <whoule@ECSCONTROLS.COM >>>> > >>>> To: <VANAGON@GERRY.VANAGON.COM>; "Scott Daniel" >>>> <scottdaniel@TURBOVANS.COM >>>> > >>>> Sent: Monday, December 29, 2008 2:07 PM >>>> Subject: Re: Transmission Noise ? >>>> >>>> >>>>> In that case, I guess they just retightened the axle nuts. I saw them >>>>> working with with the big socket & long extension handle. They >>>>> said the >>>>> rears loosened up a little. There was a rattle when going over >>>>> bumps that >>>>> developed after their first work. That's gone now, but the main >>>>> droning >>>>> noise remains. Touching the brakes and swerving side to side have no >>>>> effect at all. The noise is directly proportional to the speed of >>>>> the van. >>>>> Dry CVs sound possible, but I did them approx. 500 miles ago. I >>>>> used the >>>>> 90G grease packet that came with the Van-Cafe kit in each joint, >>>>> then I >>>>> shot a little more in with a needle after the boots were on. Does >>>>> the ring >>>>> & pinion still spin when the clutch is in and the trans is in >>>>> neutral? >>>>> >>>>> >>>>> >>>>> On Mon, 29 Dec 2008 13:28:56 -0800, Scott Daniel - Turbovans >>>>> <scottdaniel@TURBOVANS.COM> wrote: >>>>> >>>>>> hmmmm.............'readjusted rear wheel bearings sounds a little >>>>>> fishy. >>>>>> There is no adjustment per se, like the front wheel bearings have. >>>>>> There is only the torque of the large rear axle nut, and there is >>>>>> a spacer >>>>>> between the bearings that affect where things get positioned >>>>>> exactly, but >>>>>> it's not an adjustment really. >>>>>> that they checked all things......that's good. And maybe they >>>>>> meant the >>>>>> check the torque of the rear axle nuts, but there really is no way >>>>>> to >>>>>> 'adjust' the rear wheel bearings. >>>>>> Does touching the brakes while it's doing it make any difference ? >>>>>> >>>>>> 'dry CV joint' doesn't quite fit your symptom............ >>>>>> but I find many of CV joints quite dry, and worn. >>>>>> Worn ring and pinion comes to mind for a droning noise, but that's >>>>>> not a >>>>>> diagnosis......just something to consider. >>>>>> >>>>>> how does swerving gently at 35 mph affect the noise ? >>>>>> not at all, or somewhat, swerving either left or right ? >>>>>> Scott >>>>>> www.turbovans.com >>>>>> ----- Original Message ----- >>>>>> From: "Walter Houle" <whoule@ECSCONTROLS.COM> >>>>>> To: <VANAGON@GERRY.VANAGON.COM>; "Scott Daniel" >>>>> <scottdaniel@TURBOVANS.COM> >>>>>> Sent: Monday, December 29, 2008 12:24 PM >>>>>> Subject: Re: Transmission Noise ? >>>>>> >>>>>> >>>>>>> OK, I did a quick check of the plug and it was very clean. Not >>>>>>> even a >>>>>>> sliver. I also rotated the tires and verified all pressures were >>>>>>> 44 PSI. >>>>>>> Next, I went back to the shop. They checked everything, re- >>>>>>> adjusted the >>>>>>> rear bearings which were slightly loose, and re-torqued all axle, >>>>>>> CV >>>>>>> joint, and wheel lug bolts. >>>>>>> >>>>>>> Still no change in the nosie. If anything, its getting louder. >>>>>>> What can >>>>> I >>>>>>> check next? >>>>>>> >>>>>>> Walter >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Mon, 22 Dec 2008 13:32:39 -0800, Scott Daniel - Turbovans >>>>>>> <scottdaniel@TURBOVANS.COM> wrote: >>>>>>> >>>>>>>> One thing you could and should do is pull the magnetic drain >>>>>>>> plug on the >>>>>>>> trans and see how much metal is on it. >>>>>>>> A half inch diameter 'golf ball' of fine metal particles is >>>>>>>> normal. >>>>> Worse >>>>>>>> than that isn't. >>>>>>>> One one trans, I pulled out the magnetic drain plug, cleaned it >>>>>>>> off, put >>>>>>>> back in, and a bunch more metal came out with the magnet >>>>>>>> immediately. >>>>>>>> That trans was toast. >>>>>>>> >>>>>>>> for suspected wheel bearing noise you swerve gentley. >>>>>>>> USUALLY .....if >>>>> it's >>>>>>>> noisy going straight and left, but quieter going swerving >>>>>>> right.......it's a >>>>>>>> right side wheel bearing. >>>>>>>> You didn't meantion front bearings, but need to consider that too. >>>>>>>> And one of our members just had to re-do one of his rear wheel >>>>>>>> bearings >>>>>>> not >>>>>>>> long after doing them.......I wonder if you have the same thing >>>>>>>> going >>>>> on. >>>>>>>> >>>>>>>> here's another transmission bearing test : Idling in neutral, >>>>>>>> you push >>>>> in >>>>>>>> the clutch pedal, or let it up, and compare noise levels. There >>>>> shouldn't >>>>>>> be >>>>>>>> any noise either way, holding the clutch pedal down, or lettting >>>>>>>> it up. >>>>>>>> If it's quiet when pushed down, but noisy when let up ( in >>>>>>>> neutral ) >>>>>>>> ..........that indicates noisy and worn transmission input shaft >>>>>>> bearings,. >>>>>>>> I'm sure Daryl will have more insights on this.........but these >>>>>>>> are >>>>> some >>>>>>> of >>>>>>>> my tried and true bearing noise sleuthing methods. >>>>>>>> >>>>>>>> Also, where anything is 'new' as in recently worked >>>>>>>> on.........that's >>>>>>> where >>>>>>>> you look first, and the hardest. *Especially* if someone else >>>>>>>> did the >>>>>>>> work....... >>>>>>>> then you should be automatically drawn to looking into it there, >>>>>>>> where >>>>>>> work >>>>>>>> was just done. Seriously. >>>>>>>> >>>>>>>> scott >>>>>>>> www.turbovans.com >>>>>>>> >>>>>>>> ----- Original Message ----- >>>>>>>> From: "Walter Houle" <whoule@ECSCONTROLS.COM> >>>>>>>> To: <vanagon@GERRY.VANAGON.COM> >>>>>>>> Sent: Sunday, December 21, 2008 8:42 PM >>>>>>>> Subject: Transmission Noise ? >>>>>>>> >>>>>>>> >>>>>>>>> Folks - >>>>>>>>> >>>>>>>>> I never thought I'd do a "what's that noise" post, but here >>>>>>>>> goes. My >>>>> van >>>>>>>>> started making a new noise. Its a steady droning, almost as >>>>>>>>> loud as >>>>> the >>>>>>>>> motor, and it only occurs at 30 mph and higher. The noise >>>>>>>>> appears to >>>>> be >>>>>>>>> independant of the engine and the transmission. Pushing in the >>>>>>>>> clutch, >>>>>>>>> coasting in neutral, and even coasting with the motor off do >>>>>>>>> not have >>>>>>> any >>>>>>>>> effect on it. >>>>>>>>> >>>>>>>>> I'm hoping its tires or wheel bearings. However, the tires are >>>>>>>>> about a >>>>>>>>> year old Michelin LTX M/S with approx 3,000 miles, and they >>>>>>>>> never made >>>>>>> any >>>>>>>>> noise previously. The van was treated to new CVs and wheel >>>>>>>>> bearings >>>>>>> about >>>>>>>>> 500 miles ago, and the rear brakes were adjusted. I put it on >>>>>>>>> stands >>>>> and >>>>>>>>> spun each of the wheels by hand, plus under drive. Didn't feel >>>>>>>>> or hear >>>>>>>>> anything unusual, just a light drag of the brake on each wheel. >>>>>>>>> The >>>>>>> tires >>>>>>>>> also looked fine and true. The transmission, however, is >>>>>>>>> original, >>>>> with >>>>>>>>> 210,000 miles and no service whatsoever except for some very >>>>> infrequent >>>>>>>>> oil changes. >>>>>>>>> >>>>>>>>> Any ideas what I'm hearing? It really sounds like a bearing >>>>>>>>> going bad, >>>>>>> but >>>>>>>>> the fact that it happens when coasting makes me wonder. What >>>>>>>>> bearings >>>>>>> are >>>>>>>>> involved with just the driveshafts turning? >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> Walter - 85 Vanagon 1.9 Manual Transmission >>
Have something to add on this topic today? Revive this thread in the forum »