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Hi Joe B..
Henry says " you need to line up two sets of splines in the OD unit "
This is very important, as I learned the hard way the first time that I put
an OD back together.=C2=A0 I thought that I had the splines line up, but in=
fact,
I only had the first set lined up and snapped a plate tightening it down.
Hope that helps,
John
=C2=A0
On Thu, 21 Sep 2023 07:29:34 -0400, yellow04 via Fot <fot@autox.team.net> w=
rote:
=C2=A0
Joe,
If your gearbox has slowly started leaking around the adapter plate, in all=
likelihood the issue is the six bolts that hold the plate to the back of t=
he gearbox have loosened up. If nobody safety wired them or didn't use any =
kind of threadlocker on them, this is typically the problem when leaks slow=
ly start in this area. The likelihood of needing to replace the adapter pla=
te is not all that high, assuming the leak is not huge and you have not bee=
n driving the car with copious amounts of oil leaking about.
The adapter plate is not part of the overdrive unit, so replacing only the =
adapter plate is not too difficult. Six nuts hold the OD unit to the adapte=
r plate, remove the nuts from the 4 short studs first, then start working t=
he nuts on the two long studs evenly, and spring pressure should separate t=
he OD unit from the adapter plate. Pay attention to the 8 springs as you sl=
ide the OD unit off the mainshaft, when they fall out they like to roll und=
er things. Place the OD unit aside, other that cleaning the gasket surface =
you will not be messing with that.
I use the little bottle of Permatex Aviation gasket sealer for gearboxs, se=
ems to work well for me.
The six bolts that attach the adapter plate to the back of the gearbox case=
are now visible, if these bolts are not properly torqued you just found th=
e source of your leak. Remove them, clean up your gasket surfaces and resea=
l. The same gasket is used here as the non-overdrive gearbox.=C2=A0 Rimmers=
sells bolts specifically for this application, they have threadlocker that=
is safe for the aluminum case on the threads. They have been working for m=
e.=C2=A0These 6 bolts may be safety wired, always a good idea if you don't =
buy a set of new bolts from Rimmers. If you go the safety wire route, pay a=
ttention to the parts as it is easy to run the wire in such a way that it f=
ouls when the OD unit is installed.
The last adapter plate I bought from Rimmers was embossed with "ORS", I bel=
ieve it was made by Overdrive Repair Services, the business started by Layc=
ock employees after Laycock closed their doors. I didn't really compare it =
to a Triumph adapter plate, but I can see how John Esposito might call it a=
n upgraded adapter plate. If you need one, I'd just order it from Rimmers a=
long with those 6 bolts.=C2=A0
Assembling the OD unit back onto the gearbox is where the real fun is, you =
need to line up two sets of splines in the OD unit, compress the 8 springs =
and make sure you don't foul the oil pump plunger on the cam. Many ways to =
accomplish this, some are tedious, frustrating, and can completely drive yo=
u crazy. The easiest way I have found is to safety wire the pump plunger, i=
nstall the pump drive cam and make sure it is pointing away from the pump, =
apply the sealant to the gasket and place in on the OD unit, align the spli=
nes in the OD unit, (a spare OD mainshaft is really helpful with this) and =
offer up the OD unit to the box. Slowly slide the unit on assuring everythi=
ng is lined up until the gasket is almost touching the adapter plate. Then,=
install the nuts and washers on the long studs only a couple of turns. The=
n you slide the OD unit backwards WITHOUT TURNING the rear flange until it =
hits the nuts. Then you install the 8 springs in their correct position, (s=
horts go inboard, longs go outboard) by stuffing them onto their posts on t=
he sliding member then levering the other end onto the nubs on the adapter =
plate. Take a really good look to make sure you have all 8 springs correctl=
y installed, then tighten the nuts equally to draw the OD unit home. Then i=
nstall the 4 nuts and washers on the short studs, remove the safety wire on=
the oil pump plunger, refill with oil and you are good to go.
If you run into problems or need to borrow a spare OD mainshaft to line up =
the splines in the OD unit, feel free to reach out!
Henry
On 2023-09-20 19:23, Joe Boruch via Fot wrote:
I have a leaky a-type OD in my street TR4 that looks like it's leaking from=
near the adapter plate.=C2=A0 I have never taken one apart.=C2=A0 Can I ju=
st separate the OD from the trans and replace the gaskets or the adapter pl=
ate (I've heard that Quantum Mechanics sells an uprated plate and am checki=
ng with John to see if he has one) and then reassemble without needing to t=
ake the OD apart further?=C2=A0 There is a youtube video that shows an OD b=
eing 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
=2Enet
=C2=A0
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<body>
<div class=3D"userStyles" style=3D" font-family: Arial; font-size: 12pt; co=
lor: #000000;">Hi Joe B..<br>
<br>
Henry says " you need to line up two sets of splines in the OD unit "<br>
<br>
This is very important, as I learned the hard way the first time that I put=
<br>
an OD back together. I thought that I had the splines line up, but in=
fact,<br>
I only had the first set lined up and snapped a plate tightening it down.<b=
r>
<br>
Hope that helps,<br>
John
<footer class=3D"signatureContainer" style=3D"display:inline;"> </foot=
er>
<footer class=3D"replyforwardcontainer"><br>
<br>
<span>On Thu, 21 Sep 2023 07:29:34 -0400, yellow04 via Fot <fot@autox.te=
am.net> wrote:</span><br>
<p>Joe,</p>
<p>If your gearbox has slowly started leaking around the adapter plate, in =
all likelihood the issue is the six bolts that hold the plate to the back o=
f the gearbox have loosened up. If nobody safety wired them or didn't use a=
ny kind of threadlocker on them, this is typically the problem when leaks s=
lowly start in this area. The likelihood of needing to replace the adapter =
plate is not all that high, assuming the leak is not huge and you have not =
been driving the car with copious amounts of oil leaking about.</p>
<p>The adapter plate is not part of the overdrive unit, so replacing only t=
he adapter plate is not too difficult. Six nuts hold the OD unit to the ada=
pter plate, remove the nuts from the 4 short studs first, then start workin=
g the nuts on the two long studs evenly, and spring pressure should separat=
e the OD unit from the adapter plate. Pay attention to the 8 springs as you=
slide the OD unit off the mainshaft, when they fall out they like to roll =
under things. Place the OD unit aside, other that cleaning the gasket surfa=
ce you will not be messing with that.</p>
<p>I use the little bottle of Permatex Aviation gasket sealer for gearboxs,=
seems to work well for me.</p>
<p>The six bolts that attach the adapter plate to the back of the gearbox c=
ase are now visible, if these bolts are not properly torqued you just found=
the source of your leak. Remove them, clean up your gasket surfaces and re=
seal. The same gasket is used here as the non-overdrive gearbox. Rimm=
ers sells bolts specifically for this application, they have threadlocker t=
hat is safe for the aluminum case on the threads. They have been working fo=
r me. These 6 bolts may be safety wired, always a good idea if you don=
't buy a set of new bolts from Rimmers. If you go the safety wire route, pa=
y attention to the parts as it is easy to run the wire in such a way that i=
t fouls when the OD unit is installed.</p>
<p>The last adapter plate I bought from Rimmers was embossed with "ORS", I =
believe it was made by Overdrive Repair Services, the business started by L=
aycock employees after Laycock closed their doors. I didn't really compare =
it to a Triumph adapter plate, but I can see how John Esposito might call i=
t an upgraded adapter plate. If you need one, I'd just order it from Rimmer=
s along with those 6 bolts. </p>
<p>Assembling the OD unit back onto the gearbox is where the real fun is, y=
ou need to line up two sets of splines in the OD unit, compress the 8 sprin=
gs and make sure you don't foul the oil pump plunger on the cam. Many ways =
to accomplish this, some are tedious, frustrating, and can completely drive=
you crazy. The easiest way I have found is to safety wire the pump plunger=
, install the pump drive cam and make sure it is pointing away from the pum=
p, apply the sealant to the gasket and place in on the OD unit, align the s=
plines in the OD unit, (a spare OD mainshaft is really helpful with this) a=
nd offer up the OD unit to the box. Slowly slide the unit on assuring every=
thing is lined up until the gasket is almost touching the adapter plate. Th=
en, install the nuts and washers on the long studs only a couple of turns=
=2E Then you slide the OD unit backwards WITHOUT TURNING the rear flange un=
til it hits the nuts. Then you install the 8 springs in their correct posit=
ion, (shorts go inboard, longs go outboard) by stuffing them onto their pos=
ts on the sliding member then levering the other end onto the nubs on the a=
dapter plate. Take a really good look to make sure you have all 8 springs c=
orrectly installed, then tighten the nuts equally to draw the OD unit home=
=2E Then install the 4 nuts and washers on the short studs, remove the safe=
ty wire on the oil pump plunger, refill with oil and you are good to go.</p=
>
<p>If you run into problems or need to borrow a spare OD mainshaft to line =
up the splines in the OD unit, feel free to reach out!</p>
<p>Henry</p>
<p id=3D"reply-intro">On 2023-09-20 19:23, Joe Boruch via Fot wrote:</p>
<blockquote style=3D"padding: 0 0.4em; border-left: #1010ff 2px solid; marg=
in: 0" type=3D"cite">
<div id=3D"replybody1">
<div>
<div class=3D"v1yahoo-style-wrap" style=3D"font-family: Helvetica Neue, Hel=
vetica, Arial, sans-serif; font-size: 13px;">
<div dir=3D"ltr">I have a leaky a-type OD in my street TR4 that looks like =
it's leaking from near the adapter plate. I have never taken one apar=
t. Can I just separate the OD from the trans and replace the gaskets =
or the adapter plate (I've heard that Quantum Mechanics sells an uprated pl=
ate and am checking with John to see if he has one) and then reassemble wit=
hout needing to take the OD apart further? There is a youtube video t=
hat shows an OD being separated and it looks like it is do able. Thou=
ghts? JoeB</div>
</div>
</div>
</div>
</blockquote>
_______________________________________________<br>
fot@autox.team.net<br>
<br>
http://www.fot-racing.com<br>
<br>
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot<br=
>
=2Enet<br>
<br>
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</div>
</body>
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