About six years ago my BN4 started to jump out of 3rd when coasting on a
down grade. Norm Nock's Tec Talk suggested it may be a weak spring behind
the detent ball. I took the side cover off the transmission and added two
washers behind the spring and it cured the problem.
Vrooom vrooom,
John & Erika the Red
----- Original Message -----
From: <Warthodson@aol.com>
To: <frogeye@porterscustom.com>; <healey.nut@gmail.com>
Cc: <healeys@autox.team.net>
Sent: Monday, June 23, 2008 5:41 PM
Subject: Re: [Healeys] transmission
> The problem I have with both suggestions so far is that I definitely know
> that all the balls are in place & the thrust bearing clearance was
> carefully
> checked & was well within spec. Are there any other things that could
> cause
> this problem?
> Gary
>
>
> In a message dated 6/23/2008 8:08:27 A.M. Central Daylight Time,
> frogeye@porterscustom.com writes:
>
> I think perhaps Alan is being a bit overly simplistic on this one. Though
> the detents play a major role, so too the detent balls within the sliders
> for 1-2 and 3-4th. These all loose their effectiveness when the thrust
> bearings wear and allow excessive thrust under acceleration and
> deceleration
> and easily overcome the balls.
> Dave
>
> frogeye@porterscustom.com
>
> Porter Customs
> Albuquerque, NM USA 87107
> 505-352-1378
> 1954 BN2
> Porter Custom Bicycles
> www.britishcarforum.com/portercustoms.html
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