727 leak

["Stevan Miner" <miner@xxxxxxxxxxx>]

Hi Chris,
What you have leaking is the O-ring on the end of the shaft that the 
low-reverse servo arm pivots on. You can change this without trans removal 
but it takes a little work. You'll have to remove the tailshaft. Remember 
there is a snap ring under the cover that is now hidden by the rear 
transmission mount. The pan and valve body will also have to be removed. You 
can then take a long punch from the inside of the case and tap that shaft 
rearward to get at the offending o-ring. I never completely remove the shaft 
just enough to replace the O-ring. Makes it alot easier to line everything 
back up and less chance of dislodging the reverse band strut link. I always 
replace as the seals and gaskets that were distributed during the procedure 
including the selector shaft seal.
Stevan Miner
Miner Auto Service
Winnebago MN
----- Original Message ----- 
From: "Chris Strohmeyer" <chrisstroh@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Sunday, December 17, 2006 12:45 AM
Subject: IML: 727 leak


> This is going to be hard to describe but here goes. On my 67 Imperial I 
> have a leak at  just below the vertical surface that the tailshaft bolts 
> to. It's a small space between the lower flange of the tailshaft and the 
> TOP of the oil pan FLANGE. To see it you have to look from the back of the 
> transmission looking forward. It's slightly off center of the tailshaft 
> and where it's leaking appears to look like the end of a aprox 3/4" 
> diameter shaft. Oil is seeping from this "shaft end". I've looked at the 
> breakaway photos of the 727 and see nothing that looks like this inside so 
> my next step is to drain the tranny,pull the pan and see.
>
> Does anyone know what I'm talking about?
>
> Thx,
> Chris Strohmeyer
> ----- Original Message ----- 
> From: "Robin Giesbrecht" <robings@xxxxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Saturday, December 16, 2006 9:59 PM
> Subject: Re: IML: power steering leak - O rings
>
>
>> You can buy rebuild kits for the power steering pump that are really only 
>> a seal kit. There is a big oring that seals the whole canister and a few 
>> more seals for the shaft and the relief valve I think. Not that hard to 
>> do.
>>
>> Robin Giesbrecht
>> 72 Imperial
>>
>>
>>>From: Kenyon Wills <imperialist1960@xxxxxxxxx>
>>>Reply-To: mailing-list@xxxxxxxxxxxxxxxx
>>>To: mailing-list@xxxxxxxxxxxxxxxx
>>>Subject: Re: IML: power steering leak  - O rings
>>>Date: Sat, 16 Dec 2006 21:26:56 -0800 (PST)
>>>
>>>
>>>
>>>--- Chris Strohmeyer <chrisstroh@xxxxxxxxxxx> wrote:
>>>
>>> > Kenyan said...........
>>> >
>>> > 4.  "Bad o-rings"?  Anyone else that works on cars
>>> > where you live?  That sounds like bad advice to me,
>>> > but it may be out of context and part of other info
>>> > that he gave?
>>> >
>>> > Aren't there 1 or 2 large o rings on the power
>>> > steering pump that seals the
>>> > reservoir can?
>>> >
>>> > Chris
>>>
>>>
>>>
>>>True.  There are o-rings.  The way that the thing's
>>>put together sorta precludes catastrophic fluid loss
>>>as described in the letter posted here, but to address
>>>the question:
>>>
>>>If I were going to pay a mechanic to deal with this, I
>>>would buy a replacement pump unit that comes with a
>>>warranty so that I didn't have to worry about it.
>>>
>>>Reason being that I don't agree with paying a mechanic
>>>to only partially rebuild a pump for a labor charge
>>>that could very likely equal or exceed the cost of a
>>>replacement.  I would pay the rehab factory that will
>>>give a warranty do that portion instead and get the
>>>whole thing spec'd out by someone that does nothing
>>>but.  That's what I'd do, anyway.
>>>
>>>Also, a failed O-ring seal is highly unlikely to cause
>>>the sort of rapid fluid loss described, so that's what
>>>I was thinking based on the info given, but I wasn't
>>>there.
>>>
>>>
>>>Please use an o in my name.  I'm particular about
>>>that.
>>>
>>>
>>>-Kenyon
>>>
>>>
>>>
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>>
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