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RE: shifting without a clutch

To: triumphs@autox.team.net
Subject: RE: shifting without a clutch
From: "Jim Muller" <jimmuller@pop.mail.rcn.net>
Date: Sat, 21 Jul 2001 15:09:36 -0400
Organization: Southern Rail
Pouya, a.k.a. Highway Star, wrote:

> ...great you can start from a dead start and move forward,
> but while driving changing gears without a
> clutch!......what are you doing to the Synchro's?

You match the rev's of the engine to what the new gear "wants" it to be 
while the gearbox is passing through neutral.  Inotherwords, you treat it as 
if you were double-clutching, except that you don't have a clutch.

When upshifting you wait until the engine rpm's have dropped down to what 
the new gear wants (and you try to feather the throttle there) before you 
shift; when downshifting you rev the engine to the appropriate speed before 
shifting.  Of course, it helps if you know the car really well.  Also if you 
have a tach.

You don't want to force the gear in until the rpm's are about right.  The 
synchro's normally prevent the gear from dropping in until it is about at 
the right speed, and if your synchro's are good you can't force it in 
anyway.  Perhaps this is a case where you'd be better off if the gearbox is 
a bit tired!


Jim Muller
jimmuller@pop.rcn.com
'80 Spitfire (Percy)
'70 GT6+ (Nigel)

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