Date:         Mon, 28 Apr 2003 18:42:11 -0400
Reply-To:     Pat Dooley <pdooley@GTE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Pat Dooley <pdooley@GTE.NET>
Subject:      Re: Stuck in 4th gear !
In-Reply-To:  <0A3BFB3A.01F5F0D3.007135B8@aol.com>
Content-Type: text/plain; charset="iso-8859-1"

Steve, what bending are you talking about?  Sliding a piece of metal like
this with forces transmitted through a shift linkage from a mortal human
cannot damage this part.
There is no bending, and drag reduction would not prolong the blocking
ring's lifespan.(against cracking)
The blocking ring(or slider) transmits torque from the engine to the
geartrain.  Gears are selected and power transferred by "sliding" the
blocker into a specific gear.
The 3-4 ring fails because it cannot handle the torque produced by the
motor.
All that a slippery oil will do is enable the damaged blocker to slide to
little easier from the 3rd to 4th syncro assembly.
Either way, you are just prolonging the inevitable.

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
> Of Steve Cotsford
> Sent: Monday, April 28, 2003 5:00 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Stuck in 4th gear !
>
>
> In a message dated 4/21/2003 10:29:56 PM Eastern Standard Time,
> aatransaxle@juno.com writes:
>
> > Steve...Most likely the 3/4 slider is history.  I have seen a few late
> > model factory sliders break and that is why I use a custom
> built one made
> > out of tougher stuff..
> > It also could be the shift fork, but that is rarer than a
> > slider
> > problem. Call if you have any questions.
> > Daryl of AA Transaxle
> > Duvall, WA. (Seattle area)
> > (425) 788-4070
> > 1-877-377-0773 (toll free)
> > aatransaxle.com (web site)
>
> Hi Daryl,
> I have decided to install a used transmission with 74k miles on
> it.  Sure its a risk but presumably no more so than buying a van
> with those miles.   Maybe I will pull the old one down just to
> see what failed.  It does not turn freely in 4th compared to the
> other unit I just got.
> In your experience is there a way to reduce the risk of this failure?
> Certainly the square corners on the part are a "k" factor or
> stress riser but from what specifically does the stress arise?
> Presumably when the outer part slides over the inner part, there
> must be bending that results.
> How can this bending be reduced except by reducing the drag
> across it as the changer part goes from side to side?
> I would have thought that a good slippery synthetic oil would
> reduce this but maybe if the oil is too slippery the synchromesh
> rings wont work properly?
> Am I way off on this ?
> I am trying to apply the ounce of prevention even if your
> business depends on the pound of cure!
>
> cheers,
> Steve Cotsford
> Columbia SC
>