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</head><body><p>AFAIK, all A type Laycock overdrives utilize accumulators. It is one of the defining characteristics of the A type. The size of the spring determines the pressure in the accumulator. All "big" TR's, TR2 thru mid range TR6, used A types if they were equipped with factory overdrive.</p><p><br></p><p>Ed Woods</p><blockquote><p>On July 21, 2017 at 5:56 PM David Porter <frogeye@porterscustom.com> wrote:</p><p>There are different versions of the A type Laycock O/D. Most Tr's were<br>not equipped with an accumulator and used a bigger spring to help<br>engage. Over the years, it's possible that other versions were fitted<br>that have a "gentler" and somewhat slower engagement.</p><p>DaveP</p><p>On 7/21/2017 3:38 PM, hdrider570@att.net wrote:</p><blockquote><p>Depends on whether it is an "A" type or a "J" type. An "A" type<br>should engage almost instantly. A "J" type takes a few seconds. The<br>time varies with the speed of the car. The faster you go the faster<br>it engages.</p><p>Edward Hamer<br>Petaluma CA</p><p>** triumphs@autox.team.net **</p><p>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>Unsubscribe/Manage:<br><a href="http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com">http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com</a></p></blockquote><p>--<br>Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM<br>87107 505-352-1378 Go HERE: my world www.porterbikes.com/</p><p>** triumphs@autox.team.net **</p><p>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/triumphs/fogbro1@comcast.net">http://autox.team.net/mailman/options/triumphs/fogbro1@comcast.net</a></p></blockquote></body></html>