Hello Gerald,
I noticed your question to the list for overdrive information.
Unfortunately the gearbox stabiliser tie-bar is almost always overtightened
and this tends to distort the alloy annulus housing at the rear of the model
"A" Laycock overdrive unit and leads to oil leaks.The main function of this
stabiliser is that in heavy braking it prevents the whole drivetrain unit
going forward and putting the fan through the radiator.
I have myself when faced with this problem removed the complete overdrive
from the rear of the gearbox and carried out the repair on the bench, if you
remove the gearbox/overdrive fixing bolts from the rear of the overdrive
unit, the tie-bar,propshaft,gearbox mountings,speedo angle drive, drain the
oil, unbolt the overdrive from the rear of the gearbox adapter plate, jack
up the rear of the gearbox until the overdrive is free of the chassis[ do
not over jack up or you will puncture the radiator with the fan cooling
blades, and also the throttle rod will slide out of the bush on the
bulkhead].
At this stage remove the eight long springs, you can rotate the overdrive
unit to clear the gearbox mainshaft and remove the overdrive from the
vehicle, the re-fitting is the reverse, and helped with a prayer book and a
bible.
When re-fitting it does help if a second person is standing inside the body
with a bar inside the chassis cross bracing and using this to lever the
overdrive against the spring pressure to enable the draw bolts to be
secured.
Good luck.
Regards.
David.
www.bighealey.ltd.uk
----- Original Message -----
From: "Bluechipracing" <bluechipracing@snet.net>
To: "Gerald Rude" <g.rude@worldnet.att.net>; <healeys@autox.team.net>
Sent: Tuesday, March 08, 2005 3:51 PM
Subject: Re: Rear OD housing removal.
> Hi Gerald: I have successfully stopped leaks by thorough cleaning
followed
> quickly by a liberal coating of JB Weld epoxy. However on one occasion no
> amount of epoxy would stop the leak because I never really found the
source
> of the leak until I removed the gearbox. When I finally pulled the
gearbox,
> I found that the rear overdrive housing was cracked near where the
> stabilizer bar attaches underneath.
> I believe there are no gaskets where the rear housing attaches to the
front
> housing with the brake ring in between. So If your leak appears in the
area
> of the brake ring or stabilizer bar, you may have the same problem as I
did.
> You might remove the stabilizer bar and with a bright light and perhaps a
> magnifying glass look carefully for a crack.
>
> If this is unclear, I may be able to email a photo or two.
>
> Jim
>
> ----- Original Message -----
> From: "Gerald Rude" <g.rude@worldnet.att.net>
> To: <healeys@autox.team.net>
> Sent: Monday, March 07, 2005 9:17 PM
> Subject: Rear OD housing removal.
>
>
> > Hi all,
> >
> > A long time since I've posted, so hopefully this request will be
somewhat
> > clear.....
> >
> > I have a leak in my OD, and its located in the gasket at the rear most
> > overdrive housing. I don't really want to remove the whole transmission
> > to
> > replace this gasket. Has anyone replaced the gasket with the
transmission
> > still in the car??
> >
> > Thanks a bunch in advance.
> >
> > Jerry Rude
> > Prather CA
> > BJ8 MkIII Ph2
|