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Re: [TR] OD Transmission problem - suggestions?

To: Randall <tr3driver@ca.rr.com>
Subject: Re: [TR] OD Transmission problem - suggestions?
From: Rye Livingston <ryel@mac.com>
Date: Thu, 19 May 2016 14:22:14 +0000 (GMT) MailServer16C185.25034-16A-888-23ed09b22b5b t=1463667737; bh=HpG1QMZkFprcSRH/eAXefL80nxh9H0C00MTZ41aVsS8=; h=MIME-version:Content-type:To:From:Subject:Date:Message-id; b=UQt+YsgnMr+xSRZmv67CA2HB1Ry4JzHPzuG54SOsmUzP20K/Os2V0tBe1HMURsL3Q 5GlCKXMAkWSLfTMd9SiADjwdC4wuN9t/Lo2wEyTjKwA9mo/pCUYELb+oYvfjEEpSBu /c0tc8uy05dKpt6K+eW4CLP0S31xTI92bBIids7UhqLEPoCl2GVOTJyRbubMYthiYk iMIADAHedJogyN6r1MPjfQNVGiTH+iJS8Kue7CZ5a3s+WXWNz2p184nEaD8doirCMr jHSb1wJY02WQ5Z1tPrChPOaiAoTlbLE4QyWpG3nfisVhO7cTjUi2JYyJC6hrKrOdnU Z2GWBp792dRgg==
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I will send this to British Motorsports.

Thanks,

Rye



On May 19, 2016, at 06:29 AM, Randall <tr3driver@ca.rr.com> wrote:

Almost certainly an A-type, as that is the only type fitted as original.
Very slim chance someone fitted a J-type along with a later gearbox, but not
likely. I guess anything is possible (I once saw a Spitfire with a 426 Hemi
under the hood), but you'd have to be slightly crazy to put a LH or D type
behind a TRactor motor.

Things I would look at:
1) Does the pressure hold when the problem is actually happening? (Or did
they only check it on the bench)

2) How far does the ball in the operating valve actually move? It's not
unusual for components to wear until the "setting lever" is no longer
accurate.

3) Is the solenoid still drawing current when the problem happens?
Obviously, if not, the problem is electrical (outside the OD).

FWIW, I am currently having a somewhat similar problem with the A-type in my
56 TR3. In my case, the problem is almost certainly the 3-4 isolator switch
being intermittent. Bumping the shift lever slightly forward (not enough to
shift out of gear) or backward will usually get it to make contact again.
Sooner or later, I'll have to pull the cover and change the switch. Maybe
this time, I'll pay more attention to the number of shims under it.

I'm also curious how they established that the OD clutch is not slipping.
How much torque did they apply to try to make it slip?
Was that while you were seeing the problem?

-- Randall


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<html><body><div></div><div class=3D"x-apple-signature"></div><div 
class=3D"x-apple-si=
gnature">I will send this to British Motorsports.</div><div class=3D"x-app=
le-signature"><br data-mce-bogus=3D"1"></div><div class=3D"x-apple-signatu=
re">Thanks,</div><div class=3D"x-apple-signature"><br data-mce-bogus=3D"1"=
></div><div class=3D"x-apple-signature">Rye</div><div class=3D"x-apple-sig=
nature"><br data-mce-bogus=3D"1"></div><div class=3D"x-apple-signature"><b=
r data-mce-bogus=3D"1"></div><div class=3D"x-apple-signature"><br>On May 1=
9, 2016, at 06:29 AM, Randall &lt;tr3driver@ca.rr.com&gt; wrote:<br><br></=
div><div><blockquote type=3D"cite"><div class=3D"msg-quote"><div class=3D"=
_stretch"><span class=3D"body-text-content">Almost certainly an A-type, as=
 that is the only type fitted as original.<br>Very slim chance someone fit=
ted a J-type along with a later gearbox, but not<br>likely. I guess anythi=
ng is possible (I once saw a Spitfire with a 426 Hemi<br>under the hood), =
but you'd have to be slightly crazy to put a LH or D type<br>behind a TRac=
tor motor.<br><br>Things I would look at:<br>1) Does the pressure hold whe=
n the problem is actually happening? (Or did<br>they only check it on the =
bench)<br><br>2) How far does the ball in the operating valve actually mov=
e? It's not<br>unusual for components to wear until the "setting lever" is=
 no longer<br>accurate.<br><br>3) Is the solenoid still drawing current wh=
en the problem happens?<br>Obviously, if not, the problem is electrical (o=
utside the OD).<br><br>FWIW, I am currently having a somewhat similar prob=
lem with the A-type in my<br>56 TR3. In my case, the problem is almost cer=
tainly the 3-4 isolator switch<br>being intermittent. Bumping the shift le=
ver slightly forward (not enough to<br>shift out of gear) or backward will=
 usually get it to make contact again.<br>Sooner or later, I'll have to pu=
ll the cover and change the switch. Maybe<br>this time, I'll pay more atte=
ntion to the number of shims under it.<br><br>I'm also curious how they es=
tablished that the OD clutch is not slipping.<br>How much torque did they =
apply to try to make it slip?<br>Was that while you were seeing the proble=
m?<br><br>-- Randall<br><br><br>** <a href=3D"mailto:triumphs@autox.team.n=
et" data-mce-href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.n=
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