It's in a Spitfire Randall. That means it's a D or J. They don't hold
hydraulic pressure.
----- Original Message -----
From: "Randall" <tr3driver@ca.rr.com>
To: <triumphs@autox.team.net>
Sent: Thursday, November 29, 2007 11:20 AM
Subject: Re: [TR] [Spits] Over Drive Question ????
>> The unit engages hydraulically. When the input shaft isn't
>> spinning, there is no hydraulic pressure.
>
> It would be best to make clear which Laycock OD you are discussing, Nolan,
> as this is NOT true of an A-type. An A-type has a hydraulic accumulator,
> meaning it can store enough pressure (for awhile) to activate the clutches
> even without the input shaft spinning.
>
>> A number of autocrossers and such with a laycock overdrive have a
> momentary
>> contact button
>
> And (modified) A-type ODs with the early (larger) accumulator.
>
> Randall
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