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I've read a number of responses to this and all are good ideas.=C2=A0 When=
I was racing with an A-Type overdrive, I met a guy from St. Louis named Bi=
ll Boemmler, a TR-3 racer from the 50's & 60's.=C2=A0 Bill was also a skill=
ed machinist and had a small machine shop behind his house.=C2=A0 Everythin=
g I know about the A-Type overdrive, I learned from Bill.
The bottom of the adapter plate is fastened by 2 studs, one in each corner.=
=C2=A0 It generally leaks between these 2 studs.=C2=A0 Bill would drill and=
tap for two additional small bolts (about 1/2" long), spaced evenly betwee=
n the 2 studs.=C2=A0 Two holes were drilled in the adapter plate, aligned w=
ith two holes which were drilled and tapped into the overdrive housing for =
a 1/4" - 20 hex bolt.=C2=A0 This, of course, has to be done when the overdr=
ive is apart, and the holes are drilled and tapped into the rear of the O/D=
housing.=C2=A0 When assembling, it is a tight fit to get these two bolts i=
n between the gearbox housing and the adapter plate, so the bolts need to b=
e short. just long enough to get a firm threading into the O/D housing.=C2=
=A0 They should be secured with either lock tight or safety wire.
This process is a little hard to explain, so if you want a better descripti=
on either call me or contact me offline.=C2=A0 I had Bill perform this modi=
fication on all of my race and street car overdrives, and after this modifi=
cation, I never had a leak in this area.
Cheers,
Jack
On Thursday, September 21, 2023 at 12:17:01 AM EDT, Joe Boruch via Fot =
<fot@autox.team.net> wrote: =20
=20
I have a leaky a-type OD in my street TR4 that looks like it's leaking fro=
m near the adapter plate.=C2=A0 I have never taken one apart.=C2=A0 Can I j=
ust separate the OD from the trans and replace the gaskets or the adapter p=
late (I've heard that Quantum Mechanics sells an uprated plate and am check=
ing with John to see if he has one) and then reassemble without needing to =
take the OD apart further?=C2=A0 There is a youtube video that shows an OD =
being separated and it looks like it is do able.=C2=A0 Thoughts?=C2=A0 JoeB=
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
yahoo.com
=20
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<html><head></head><body><div class=3D"ydp42159c9byahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
<div dir=3D"ltr" data-setdir=3D"false">I've read a number of respon=
ses to this and all are good ideas. When I was racing with an A-Type =
overdrive, I met a guy from St. Louis named Bill Boemmler, a TR-3 racer fro=
m the 50's & 60's. Bill was also a skilled machinist and had a sm=
all machine shop behind his house. Everything I know about the A-Type=
overdrive, I learned from Bill.</div><div dir=3D"ltr" data-setdir=3D"false=
"><br></div><div dir=3D"ltr" data-setdir=3D"false">The bottom of the adapte=
r plate is fastened by 2 studs, one in each corner. It generally leak=
s between these 2 studs. Bill would drill and tap for two additional =
small bolts (about 1/2" long), spaced evenly between the 2 studs. Two=
holes were drilled in the adapter plate, aligned with two holes which were=
drilled and tapped into the overdrive housing for a 1/4" - 20 hex bolt.&nb=
sp; This, of course, has to be done when the overdrive is apart, and the ho=
les are drilled and tapped into the rear of the O/D housing. When ass=
embling, it is a tight fit to get these two bolts in between the gearbox ho=
using and the adapter plate, so the bolts need to be short. just long enoug=
h to get a firm threading into the O/D housing. They should be secure=
d with either lock tight or safety wire.</div><div dir=3D"ltr" data-setdir=
=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">This process is=
a little hard to explain, so if you want a better description either call =
me or contact me offline. I had Bill perform this modification on all=
of my race and street car overdrives, and after this modification, I never=
had a leak in this area.</div><div dir=3D"ltr" data-setdir=3D"false"><br><=
/div><div dir=3D"ltr" data-setdir=3D"false">Cheers,</div><div dir=3D"ltr" d=
ata-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Jack<=
br></div><div><br></div>
=20
</div><div id=3D"ydpbcfd6533yahoo_quoted_5731179853" class=3D"ydpbc=
fd6533yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Thursday, September 21, 2023 at 12:17:01 AM EDT, Joe=
Boruch via Fot <fot@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"ydpbcfd6533yiv9509853357"><div><div style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;" class=3D"ydpbcfd6533yiv9509853357yahoo-style-wrap"><div dir=3D"ltr">I ha=
ve a leaky a-type OD in my street TR4 that looks like it's leaking from nea=
r the adapter plate. I have never taken one apart. Can I just s=
eparate the OD from the trans and replace the gaskets or the adapter plate =
(I've heard that Quantum Mechanics sells an uprated plate and am checking w=
ith John to see if he has one) and then reassemble without needing to take =
the OD apart further? There is a youtube video that shows an OD being=
separated and it looks like it is do able. Thoughts? JoeB</div=
></div></div></div>_______________________________________________<br><a hr=
ef=3D"mailto:fot@autox.team.net"; rel=3D"nofollow" target=3D"_blank">fot@aut=
ox.team.net</a><br><br><a href=3D"http://www.fot-racing.com"; rel=3D"nofollo=
w" target=3D"_blank">http://www.fot-racing.com</a><br><br>Donate: <a href=
=3D"http://www.team.net/donate.html"; rel=3D"nofollow" target=3D"_blank">htt=
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et/archive" rel=3D"nofollow" target=3D"_blank">http://autox.team.net/archiv=
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=3D"_blank">http://www.team.net/pipermail/fot</a><br>Unsubscribe/Manage: <a=
href=3D"http://autox.team.net/mailman/options/fot/jwheeler1947@yahoo.com"; =
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t/jwheeler1947@yahoo.com</a><br><br><br></div>
</div>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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