I had a similar situation happen with the OD in my '76 about 7 years ago. I
first made sure that the solenoid was working correctly. I removed the
small rectangular cover on the bottom and then removed the filter screen. I
found one quarter of a brass thrust washer behind the screen. This brass
washer is about 1/8" thick, 2" dia, and has a cross-shaped oil groove cut in
it. Evidently it broke along the oil channels. Without this washer, the
cone clutch in the OD cannot engage, so the OD is always on.
Although the Haynes manual and the Moss and VB catalogs show one thrust
washer, there are actually two and they are different. One is behind the
unidirectional clutch (shown) and the other is located in a seat inside the
main housing (not shown). Of course the one I needed was the one not shown!
I had to get a replacement out of a junk yard.
My prayers are with you, my son.
----- Original Message -----
From: "Mark and kathy LaPierre" <mgtrcars@cyberlink.com>
To: <mgs@autox.team.net>
Sent: Saturday, November 11, 2000 5:49 PM
Subject: Overdrive stuck
> Listers
> With the help of encouraging comments from this list, my 74.5 GT rides
> again. Its full of holes at this time but we'll take care of those at a
> later date.
> For now I need some advise on the stuck OD. I've been able to drive
it
> around for a few days and the OD worked well. I noticed today I wasn't
> getting any OD kick down in
> 3rd or 4th gear. I tried moving the stick lever to help engage the switch
> on the trany. but nothing. Then it dawned on me that it acutally felt
> like it was already in OD in both gears with out even throwing the
steering
> column switch.
> Then it happened , pulling into the driveway my wife had blocked my
way
> and yes you guessed it , I had to put it into reverse. What the heck?
It
> just spun freely. Then it hit me, how many times have I read on the list
not
> to go into reverse with OD on. So I just let it roll down the hill, into
> the street so I could at least go forward again. A quick trip around the
> block to check things out, and the forward gears are OK , how ever the OD
is
> still on.
> OK you MGineers, what is happening here and how do I release the
> whatever is stuck?
> The trany fluid (20/50) was changed last week along with cleaning the
> release valve.
> Thanks in advance. Mark
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