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Hi all,
Last year I requestedyour help regarding a strange overdrive or slippage pr=
oblem I have in my 1962Tricarb BT7.=20
I received veryvaluable comments and suggestions but sadly the problem pers=
ists: Overdrivewould not activate under any circumstances and when the engi=
ne / transmissionis warm and we engage reverse, the engine revs but the car=
won=C2=B4t move.=20
There is slippagesomewhere in the transmission / clutch or overdrive. When =
the car is cold,reverse engages without any issues. This only happens in re=
verse gear after thecar has been driven a few miles and the engine and tran=
smission are warm.Forward gears engage all the time without any issues.
The car has beenrecently restored. Before the restoration the overdrive was=
operational. Nowit=E2=80=99s not.=20
The transmission andoverdrive have been taken apart and assembled twice loo=
king for somethingvisually wrong. Everything seemed to be OK.
The clutch and platewere also removed for inspection. The clutch was recent=
ly redone, adjusted andtested.
A friend suggested weshould verify the oil pressure on the overdrive. On th=
is link you will find acouple of videos of a test we have recently done wit=
h a manometer installed onthe overdrive to check the oil pressure at differ=
ent RPM=C2=B4s.=20
https://www.dropbox.com/sh/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-udA4a?dl=3D0
The pressure on 3rd and 4th gears goes upto 400 psi and drops as it goes to=
lower gears. At idle is between 150 to 200psi
In forward gears thecar runs fine; the problem that we need to solve is tha=
t the overdrive would notactivate(even though it is connected and everythin=
g seems visually OK) and theslippage we have when engaging reverse (the car=
won=C2=B4t move) when the engine /transmission is warm.
We are located inLima =E2=80=93 Peru and as you may imagine, there are not =
many experts in thisparticular area of expertise.
Any thoughts or suggestionsfrom you collective knowledge and wisdom on how =
to proceed will be muchappreciated.=20
Thanks in advance!
Rafael
=C2=A0
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<html><head></head><body><div class=3D"yahoo-style-wrap" style=3D"font-fami=
ly:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir=
=3D"ltr" data-setdir=3D"false"><div><p class=3D"ydpfe39e09bxyiv3660242746ms=
onormal" style=3D"background:white"><span style=3D"font-size:11.0pt;font-fa=
mily:"Calibri",sans-serif">Hi all,</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>Last year I requested
your help regarding a strange overdrive or slippage problem I have in my 19=
62
Tricarb BT7. </span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>I received very
valuable comments and suggestions but sadly the problem persists: Overdrive
would not activate under any circumstances and when the engine / transmissi=
on
is warm and we engage reverse, the engine revs but the car won=C2=B4t move.=
</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>There is slippage
somewhere in the transmission / clutch or overdrive. When the car is cold,
reverse engages without any issues. This only happens in reverse gear after=
the
car has been driven a few miles and the engine and transmission are warm.
Forward gears engage all the time without any issues.</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>The car has been
recently restored. Before the restoration the overdrive was operational. No=
w
it=E2=80=99s not. </span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>The transmission and
overdrive have been taken apart and assembled twice looking for something
visually wrong. Everything seemed to be OK.</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>The clutch and plate
were also removed for inspection. The clutch was recently redone, adjusted =
and
tested.</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>A friend suggested we
should verify the oil pressure on the overdrive. On this link you will find=
a
couple of videos of a test we have recently done with a manometer installed=
on
the overdrive to check the oil pressure at different RPM=C2=B4s. </span></p=
>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
><a href=3D"https://www.dropbox.com/sh/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-=
udA4a?dl=3D0" rel=3D"nofollow" target=3D"_blank">https://www.dropbox.com/sh=
/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-udA4a?dl=3D0</a></span></p>
<p class=3D"ydpfe39e09bMsoNormal"><span>The pressure on 3rd and 4th gears g=
oes up
to 400 psi and drops as it goes to lower gears. At idle is between 150 to 2=
00
psi</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>In forward gears the
car runs fine; the problem that we need to solve is that the overdrive woul=
d not
activate(even though it is connected and everything seems visually OK) and =
the
slippage we have when engaging reverse (the car won=C2=B4t move) when the e=
ngine /
transmission is warm.</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>We are located in
Lima =E2=80=93 Peru and as you may imagine, there are not many experts in t=
his
particular area of expertise.</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>Any thoughts or suggestions
from you collective knowledge and wisdom on how to proceed will be much
appreciated. </span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background:white">=
<span style=3D"font-size:11.0pt;font-family:"Calibri",sans-serif"=
>Thanks in advance!</span></p>
<p class=3D"ydpfe39e09bxyiv3660242746msonormal" style=3D"background: white;=
orphans: 2; widows: 2; text-decoration-style: initial; text-decoration-col=
or: initial; word-spacing: 0px;"><span lang=3D"ES-MX" style=3D"font-size:11=
.0pt;font-family:"Calibri",sans-serif;mso-ansi-language:ES-MX">Ra=
fael</span></p>
<p class=3D"ydpfe39e09bMsoNormal"> </p></div><br></div></div></body></=
html>
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