[Healeys] Rich ? overdrive

[PG]

I'm not sure if the overdrive throttle switch was for preservation of the
overdrive or for a more comfortable drive.

When I rebuilt my overdrive, I put an oversized competition accumulator
piston for a faster more positive shift and removed the throttle switch for
more control......works well in competition. However, it does give a very
"jerky" shift.

To alleviate the "jerky" feeling, I sometimes depress the clutch when
shifting up or down (with a throttle blip).

Works cars did not have the throttle switch.

paul

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Mark LaPierre
Sent: Thursday, November 04, 2010 7:21 PM
To: Rich Chrysler; 'Herbert Miller'; healeys at autox.team.net
Subject: Re: [Healeys] Rich ? overdrive

Rich,  What about the later MGB  boxes with the LH overdrive.   To your 
knowledge were the gears a different type and more durable cause I know 
those didn't use any type of throttle switch when changing  out of OD?  I've

always been very curious about that since I've owned my Healey.

 And the real beauty with the LH was that you didn't have to adjust the 
frigin solenoid
to make it work ,,,,,,sometimes.



Mark

----- Original Message ----- 
From: "Rich Chrysler" <richchrysler at quickclic.net>
To: "'Herbert Miller'" <hgmiller3 at qwest.net>; <healeys at autox.team.net>
Sent: Thursday, November 04, 2010 5:34 PM
Subject: Re: [Healeys] overdrive


> The workshop manual describes it nicely. The throttle switch (when set
> correctly) requires the driver not only to turn the o/d switch off, but 
> also
> to increase the revs to be able to drop the overdrive unit out of
> engagement. This increase in engine speed meets the downshift out of
> overdrive smoothly instead of shocking the entire drive line as it drops
> back to normal.
> Early MGB's used a vacuum switch for the same purpose.
>
> Rich
>
> /Manage: 
> http://autox.team.net/mailman/options/healeys/lapierrem@sbcglobal.net 
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