Date: Mon, 29 Mar 1999 09:48:04 -0800
Reply-To: Randy Bergum <organslave@EARTHLINK.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Randy Bergum <organslave@EARTHLINK.NET>
Subject: Re: Buzzing stick shift and Redline?
Content-Type: text/plain; charset=us-ascii
Hi Vern:
My '90 van used to buzz too. There are at least two ways of buzzing: Rattling
linkage from engine vibrations, and a poorly adjusted linkage that causes pressure on
the transmission shift forks while in gear.
The first problem happens if there is a lot of wear on the bushings and U-joint.
I think that the shift linkage transmits vibrations from the engine, and may resonate
itself. Check that all bushings for the shifter are not worn excessively, then grease
them with moly grease. If you use a needle attachment on the grease gun, just pull
the boots and shields back and inject a fair amount of lube, mostly filling the boot.
The buzz should go away and the action will smooth out considerably. These bushings
really do need grease about every 20k, same as filter changes.
The second problem happens when the shifter is not adjusted right. At the
connection with the band clamp, you can twist the shafts to align the transmission
with the front gate box under the stickshift in front. If this is not done right,
pressure is applied to the shift forks, and they make a slight grinding noise. You
can check this out easily by trying each gear one at a time: Drive in first gear,
then push the stick down as if you were going to go into first - don't put the knob
into the neutral gate. Carefully and slowly push the stick sideways in each
direction, and listen if the transmission noises go away on one side, or get louder on
the other. If so, you will need to rotate the joint a little to align it.
Hope this helps......
Randy Bergum.
are forced to
Vernon Craddock wrote:
> Hello all,
> Last Thursday, I changed my transmission fluid to Redline MT90. I noticed
> an immediate improvement in shifting. Then, Friday I had a 2 hour road
> trip. At one stop, the transmission repeatedly ground trying to get into
> reverse. I tried it three times, each time, it ground then went into gear.
> I was concerned, but it has not repeated since. More concerning, I now
> notice that First and Second gears, a buzzing sound comes from the stick
> shift. The sound goes away if I pull stick towards the steering wheel.
> First buzzes intermittently, Second buzzes whenever under load. Arghhh!!!
> What have I done?
>
> Do I need to adjust the linkage?
> Adjust the plate at the base of the shifter?
> Why would changing the fluid cause this to appear?
>
> Thanks,
> Vernon
> '90 Standard Vanagon
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