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With Harold=E2=80=99s brass bush measurements in hand, I went out to the ga=
rage and measured a nylon bush from a spare BJ8 gearbox top cover that has =
a 22B casting number and the threaded pin type =E2=80=98stick=E2=80=99 reta=
iners. This bush is nominally .742 in diameter, so the lever / bush assemb=
lies themselves will not interchange =E2=80=93 the holes different sizes - =
the socket piece is a different part #.
I believe that the whole top cover assembly will interchange on the gearbox=
case.
The original parts list indicates that there were approx. 18 early BJ8 gear=
boxes that were either BJ7, or had BJ7 top covers installed, or possibly we=
re true BJ8 gearboxes with roll pins. It=E2=80=99s possible that Simon=E2=
=80=99s gold seal replacement is one of these, as anything later would have=
the threaded pins in the turret. To me, it=E2=80=99s much more likely tha=
t the rebuilders have fitted a replacement nylon bush =E2=80=93 probably fr=
om a period MGB transmission. Or possibly have fitted a BJ8 socket piece i=
nto the early top cover, along with a BJ8 lever and bush. Simon would have=
to start taking things apart again to find out =E2=80=93 I=E2=80=99m sure =
that he doesn=E2=80=99t want to do that!
I have a top shift BT7, and a BJ8 =E2=80=93 and had several others. I=E2=
=80=99ve never noticed a huge big difference in the way they shift. One sh=
ould remove the shift lever and clean out the hole and relubricate things e=
very decade or so. I keep the nylon bush lubed the same as the brass one. =
(I should say kept as the BJ8 now has a Smitty 5-speed installed). I suspe=
ct that the factory changed to the nylon bush because it was likely way che=
aper to manufacture.
Earl Kagna
Victoria BC
BJ8, BT7 tri-carb
From: Healeys <healeys-bounces@autox.team.net> On Behalf Of Harold Manifold=
via Healeys
Sent: Friday, December 3, 2021 10:05 AM
To: simon.lachlan@alexarevel.plus.com; richard mayor <boyracer466@gmail.com=
>
Cc: Healeys <healeys@autox.team.net>
Subject: Re: [Healeys] Center change gear sticks
Simon,
I have two Healey transmissions both in some degree of disassembly. I measu=
red the brass bush on both:
Trans 1 =E2=80=93 Side Shift from a BN4 - OD 0.685=E2=80=9D x 0.49=E2=80=
=9D H
Trans 2 =E2=80=93 BJ7 Centre Shift with Roll Pins =E2=80=93 OD 0.675=E2=80=
=9D x 0.48=E2=80=9D H
The service parts list for both these transmissions lists AEC3520 as the BM=
C part number for the brass bush.
As we all know these bushes fit into a machined socket that is part of the =
gear change mechanism. The bushes are in two haves and held together with a=
circlip. I will suggest that a one piece nylon bush may be superior to the=
original brass if it is the right size to both fit the ball at the end of =
the gear lever and slide freely in the socket. When I took apart both these=
transmissions there was a build up of debris, oil, corrosion, etc. in the =
socket that prevented the bush from moving freely. A nylon bush the right s=
ize that doesn=E2=80=99t require lubrication may give a better feel to the =
gear shift and not have the issues with debris build up in the socket.
What are the dimensions of the replacement nylon bush?
Regards,
Harold
Sent: Friday, December 3, 2021 9:03 AM
Subject: Re: [Healeys] Center change gear sticks
Well, who knows? I have a MkII which has had the roll pins (BT7, BN7 & BJ7)=
and the nylon bush (BJ8) for the last 25++ years. And which worked fine.
When I asked AHSpares for a new bush, this one having been there for 25++ y=
ears, they sent me a nylon one.
Yours confused of Bradninch. (aka Simon).
=2Eteam.net> > On Behalf Of richard mayor via Healeys
Sent: 03 December 2021 16:38
Subject: [Healeys] Center change gear sticks
I have a top cover for what I thought was for a BJ8. I have no stick and n=
o bushings - just the bare cover. I has the roll pins in place. Does thi=
s mean it is for a BJ7 and not a BJ8?
And if it came from a BJ7 can it still be used on a BJ8 transmission assumi=
ng one could find the proper stick and bushing?
Thanks, Richard
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli=
nk=3D"#954F72" style=3D'word-wrap:break-word'><div class=3DWordSection1><p =
class=3DMsoNormal>With Harold=E2=80=99s brass bush measurements in hand, I =
went out to the garage and measured a nylon bush from a spare BJ8 gearbox t=
op cover that has a 22B casting number and the threaded pin type =E2=80=98s=
tick=E2=80=99 retainers.=C2=A0 This bush is nominally .742 in diameter, so =
the lever / bush assemblies themselves will not interchange =E2=80=93 the h=
oles different sizes - the socket piece is a different part #.<o:p></o:p></=
p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>I believe =
that the whole top cover assembly will interchange on the gearbox case.<o:p=
></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>T=
he original parts list indicates that there were approx. 18 early BJ8 gearb=
oxes that were either BJ7, or had BJ7 top covers installed, or possibly wer=
e true BJ8 gearboxes with roll pins.=C2=A0 It=E2=80=99s possible that Simon=
=E2=80=99s gold seal replacement is one of these, as anything later would h=
ave the threaded pins in the turret.=C2=A0 To me, it=E2=80=99s much more li=
kely that the rebuilders have fitted a replacement nylon bush =E2=80=93 pro=
bably from a period MGB transmission.=C2=A0 Or possibly have fitted a BJ8 s=
ocket piece into the early top cover, along with a BJ8 lever and bush.=C2=
=A0 Simon would have to start taking things apart again to find out =E2=80=
=93 I=E2=80=99m sure that he doesn=E2=80=99t want to do that!<o:p></o:p></p=
><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>I have a to=
p shift BT7, and a BJ8 =E2=80=93 and had several others.=C2=A0 I=E2=80=99ve=
never noticed a huge big difference in the way they shift.=C2=A0 One shoul=
d remove the shift lever and clean out the hole and relubricate things ever=
y decade or so.=C2=A0 I keep the nylon bush lubed the same as the brass one=
=2E (I should say kept as the BJ8 now has a Smitty 5-speed installed).=C2=
=A0 I suspect that the factory changed to the nylon bush because it was lik=
ely way cheaper to manufacture.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nb=
sp;</o:p></p><p class=3DMsoNormal>Earl Kagna<o:p></o:p></p><p class=3DMsoNo=
rmal>Victoria BC<o:p></o:p></p><p class=3DMsoNormal>BJ8, BT7 tri-carb<o:p><=
/o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal> =
=C2=A0<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><div><div st=
yle=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in=
'><p class=3DMsoNormal><b>From:</b> Healeys <healeys-bounces@autox.team.=
net> <b>On Behalf Of </b>Harold Manifold via Healeys<br><b>Sent:</b> Fri=
day, December 3, 2021 10:05 AM<br><b>To:</b> simon.lachlan@alexarevel.plus.=
com; richard mayor <boyracer466@gmail.com><br><b>Cc:</b> Healeys <=
healeys@autox.team.net><br><b>Subject:</b> Re: [Healeys] Center change g=
ear sticks<o:p></o:p></p></div></div><p class=3DMsoNormal><o:p> </o:p>=
</p><p class=3DMsoNormal>Simon,<o:p></o:p></p><p class=3DMsoNormal><o:p>&nb=
sp;</o:p></p><p class=3DMsoNormal>I have two Healey transmissions both in s=
ome degree of disassembly. I measured the brass bush on both:<o:p></o:p></p=
><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Trans 1 =E2=
=80=93 Side Shift from a BN4 - OD 0.685=E2=80=9D x 0.49=E2=80=
=9D H<o:p></o:p></p><p class=3DMsoNormal>Trans 2 =E2=80=93 BJ7 Centre Shift=
with Roll Pins =E2=80=93 OD 0.675=E2=80=9D x 0.48=E2=80=9D H<o:p></o:p></p=
><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>The service=
parts list for both these transmissions lists AEC3520 as the BMC part numb=
er for the brass bush.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p>=
</p><p class=3DMsoNormal>As we all know these bushes fit into a machined so=
cket that is part of the gear change mechanism. The bushes are in two haves=
and held together with a circlip. I will suggest that a one piece nylon bu=
sh may be superior to the original brass if it is the right size to both fi=
t the ball at the end of the gear lever and slide freely in the socket. Whe=
n I took apart both these transmissions there was a build up of debris, oil=
, corrosion, etc. in the socket that prevented the bush from moving freely.=
A nylon bush the right size that doesn=E2=80=99t require lubrication may g=
ive a better feel to the gear shift and not have the issues with debris bui=
ld up in the socket.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></=
p><p class=3DMsoNormal>What are the dimensions of the replacement nylon bus=
h?<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNo=
rmal>Regards,<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p cl=
ass=3DMsoNormal>Harold<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p>=
</p><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0in 0in 0in'><p class=3DMsoNormal><b>From: </b><a href=3D"mailto:healeys@au=
tox.team.net">Simon Lachlan via Healeys</a><br><b>Sent: </b>Friday, Decembe=
r 3, 2021 9:03 AM<br><b>To: </b><a href=3D"mailto:boyracer466@gmail.com";>ri=
chard mayor</a><br><b>Cc: </b><a href=3D"mailto:healeys@autox.team.net";>Hea=
leys</a><br><b>Subject: </b>Re: [Healeys] Center change gear sticks<o:p></o=
:p></p></div><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal=
><span lang=3DEN-GB>Well, who knows? I have a MkII which has had the roll p=
ins (BT7, BN7 & BJ7) and the nylon bush (BJ8) for the last 25++ years. =
And which worked fine.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=
=3DEN-GB>When I asked AHSpares for a new bush, this one having been there f=
or 25++ years, they sent me a nylon one.<o:p></o:p></span></p><p class=3DMs=
oNormal><span lang=3DEN-GB>Yours confused of Bradninch. (aka Simon).<o:p></=
o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB> <o:p></o:p></s=
pan></p><p class=3DMsoNormal><b>From:</b> Healeys <<a href=3D"mailto:hea=
leys-bounces@autox.team.net">healeys-bounces@autox.team.net</a>> <b>On B=
ehalf Of </b>richard mayor via Healeys<br><b>Sent:</b> 03 December 2021 16:=
38<br><b>To:</b> healeys <<a href=3D"mailto:healeys@autox.team.net";>heal=
eys@autox.team.net</a>><br><b>Subject:</b> [Healeys] Center change gear =
sticks<span lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal><span l=
ang=3DEN-GB> <o:p></o:p></span></p><div><div><p class=3DMsoNormal><spa=
n lang=3DEN-GB>I have a top cover for what I thought was for a BJ8. I=
have no stick and no bushings - just the bare cover. I has the roll =
pins in place. Does this mean it is for a BJ7 and not a BJ8?<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span lang=3DEN-GB> <o:p=
></o:p></span></p></div><div><p class=3DMsoNormal><span lang=3DEN-GB>And if=
it came from a BJ7 can it still be used on a BJ8 transmission assuming one=
could find the proper stick and bushing? <o:p></o:p></span></p></div=
><div><p class=3DMsoNormal><span lang=3DEN-GB> <o:p></o:p></span></p><=
/div></div><p class=3DMsoNormal><span lang=3DEN-GB>Thanks, Richard<o:=
p></o:p></span></p><p class=3DMsoNormal><o:p> </o:p></p></div><div id=
=3D"DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
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