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=20
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 top cover that =
has a 22B casting number and the threaded pin type =
=E2=80=98stick=E2=80=99 retainers. This bush is nominally .742 in =
diameter, so the lever / bush assemblies themselves will not interchange =
=E2=80=93 the holes different sizes - the socket piece is a different =
part #.
=20
I believe that the whole top cover assembly will interchange on the =
gearbox case.
=20
The original parts list indicates that there were approx. 18 early BJ8 =
gearboxes that were either BJ7, or had BJ7 top covers installed, or =
possibly were 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.=20
>> Or it=E2=80=99s a subtle BMC blend.
To me, it=E2=80=99s much more likely that the rebuilders have fitted a =
replacement nylon bush =E2=80=93 probably from a period MGB =
transmission. Or possibly have fitted a BJ8 socket piece into 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!
>> The nylon bush that came out is the same as the new from AH Spares ie =
not MGB. And, no, he doesn=E2=80=99t want to take things apart again. =
But, I am getting a new carpet set so will have tunnel cover out. I may =
take it all apart and see what=E2=80=99s what.
I think that the thing to cling to is that it worked for 25++ years even =
though it appears to be wrong somehow. And, of course, it=E2=80=99s =
still working with its roll pins and nylon bush.
I=E2=80=99ll try and get some sense out of all of this. Maybe if/when I =
have the two sticks side by side.
Simon
=20
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 should remove the shift lever and clean out the hole and relubricate =
things every 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 suspect that the factory changed to the nylon bush =
because it was likely way cheaper to manufacture.
=20
Earl Kagna
Victoria BC
BJ8, BT7 tri-carb
=20
=20
=20
From: Healeys <healeys-bounces@autox.team.net =
via Healeys
Sent: Friday, December 3, 2021 10:05 AM
To: simon.lachlan@alexarevel.plus.com =
Subject: Re: [Healeys] Center change gear sticks
=20
Simon,
=20
I have two Healey transmissions both in some degree of disassembly. I =
measured the brass bush on both:
=20
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
=20
The service parts list for both these transmissions lists AEC3520 as the =
BMC part number for the brass bush.
=20
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 size 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.
=20
What are the dimensions of the replacement nylon bush?
=20
Regards,
=20
Harold
=20
Sent: Friday, December 3, 2021 9:03 AM
Subject: Re: [Healeys] Center change gear sticks
=20
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++ years, they sent me a nylon one.
Yours confused of Bradninch. (aka Simon).
=20
From: Healeys <healeys-bounces@autox.team.net =
Healeys
Sent: 03 December 2021 16:38
Subject: [Healeys] Center change gear sticks
=20
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?
=20
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? =20
=20
Thanks, Richard
=20
=20
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=20
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal><span =
lang=3DEN-US>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 top cover that has a 22B casting number and the threaded pin =
type =E2=80=98stick=E2=80=99 retainers. This bush is nominally =
742 in diameter, so the lever / bush assemblies themselves will not =
interchange =E2=80=93 the holes different sizes - the socket piece is a =
different part #.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I believe that the whole top cover assembly will =
interchange on the gearbox case.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>The original parts list indicates =
that there were approx. 18 early BJ8 gearboxes that were either BJ7, or =
had BJ7 top covers installed, or possibly were 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. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>>> Or it=E2=80=99s a subtle =
BMC blend.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US> =
To me, it=E2=80=99s much more likely that the rebuilders have fitted a =
replacement nylon bush =E2=80=93 probably from a period MGB =
transmission. Or possibly have fitted a BJ8 socket piece into 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!<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>>> The nylon bush that came =
out is the same as the new from AH Spares ie not MGB. And, no, he =
doesn=E2=80=99t want to take things apart again. But, I am getting a new =
carpet set so will have tunnel cover out. I may take it all apart and =
see what=E2=80=99s what.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I think that the thing to cling to is that it worked for =
25++ years even though it appears to be wrong somehow. And, of course, =
it=E2=80=99s still working with its roll pins and nylon =
bush.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I=E2=80=99ll try and get some sense out of all of this. =
Maybe if/when I have the two sticks side by =
side.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Simon<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>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 should remove the shift lever and clean out =
the hole and relubricate things every 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 suspect that the =
factory changed to the nylon bush because it was likely way cheaper to =
manufacture.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Earl Kagna<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Victoria BC<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>BJ8, BT7 tri-carb<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> Healeys <<a =
href=3D"mailto:healeys-bounces@autox.team.net";>healeys-bounces@autox.team=
net</a>> <b>On Behalf Of </b>Harold Manifold via =
Healeys<br><b>Sent:</b> Friday, December 3, 2021 10:05 AM<br><b>To:</b> =
<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexareve=
l.plus.com</a>; richard mayor <<a =
href=3D"mailto:boyracer466@gmail.com";>boyracer466@gmail.com</a>><br><b=
>Cc:</b> Healeys <<a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>><br>=
<b>Subject:</b> Re: [Healeys] Center change gear =
sticks<o:p></o:p></span></p></div></div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Simon,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I have two Healey transmissions both in some degree of =
disassembly. I measured the brass bush on both:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>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></span></p><p class=3DMsoNormal><span lang=3DEN-US>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></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>The service parts list for both these transmissions lists =
AEC3520 as the BMC part number for the brass =
bush.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>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 size 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.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>What are the dimensions of the replacement nylon =
bush?<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Regards,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Harold<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US>From: =
</span></b><span lang=3DEN-US><a =
href=3D"mailto:healeys@autox.team.net";>Simon Lachlan via =
Healeys</a><br><b>Sent: </b>Friday, December 3, 2021 9:03 AM<br><b>To: =
</b><a href=3D"mailto:boyracer466@gmail.com";>richard mayor</a><br><b>Cc: =
</b><a href=3D"mailto:healeys@autox.team.net";>Healeys</a><br><b>Subject: =
</b>Re: [Healeys] Center change gear =
sticks<o:p></o:p></span></p></div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal>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.<o:p></o:p></p><p class=3DMsoNormal>When I asked AHSpares for a new =
bush, this one having been there for 25++ years, they sent me a nylon =
one.<o:p></o:p></p><p class=3DMsoNormal>Yours confused of Bradninch. =
(aka Simon).<o:p></o:p></p><p class=3DMsoNormal> <o:p></o:p></p><p =
class=3DMsoNormal><b><span lang=3DEN-US>From:</span></b><span =
lang=3DEN-US> Healeys <<a =
href=3D"mailto:healeys-bounces@autox.team.net";>healeys-bounces@autox.team=
net</a>> <b>On Behalf 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";>healeys@autox.team.net</a>><br>=
<b>Subject:</b> [Healeys] Center change gear =
sticks</span><o:p></o:p></p><p =
class=3DMsoNormal> <o:p></o:p></p><div><div><p class=3DMsoNormal>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></p></div><div><p =
class=3DMsoNormal> <o:p></o:p></p></div><div><p =
class=3DMsoNormal>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></p></div><div><p =
class=3DMsoNormal> <o:p></o:p></p></div></div><p =
class=3DMsoNormal>Thanks, Richard<o:p></o:p></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p><div =
id=3DDAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><table class=3DMsoNormalTable =
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