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Fluid Drive Trans Leak


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Posted

1950 Chrysler Windsor, 251, M6....

 

When I got the car the trans was empty and it shifted like it! I got my hands on about 3 gallons of the correct 10 WT oil for the trans, topped it off and went for a ride. It drove and shifted great then I parked it and came back outside about an hour later and there was a pool under the trans. I found a major leak at the solenoid and governor (gaskets were shot), I cleaned them and installed a new O ring on each to seal them up, it worked great and once again I took it for a drive. It shifted awesome and then I shut off the car and looked underneath... The second I turned the car off it started pouring 10wt out of the little drain I guess in the bottom of the bellhousing.

 

 

First leak...

 

 

 20130908_165839_zpsd071e503.jpg

 

Fixed...

 

20130908_175719_zps56b1f7c0.jpg

 

O rings (size -214) installed in place of gaskets..

 

20130908_175727_zps0bdddc6b.jpg

 

This pic is before I pressure washed the underside of the car but you can see the little square in the circle at the bottom of the bell...

 

20130905_123153_zpsd1a6f405.jpg

 

 

So I am guessing I need to pull the trans to replace the gasket/seal that is leaking? I am still waiting on my shop manual to get here so until them I am at your mercy!

Posted

J.R. -

 

Thanks for id'ing the subject vehicle right at the top of your Post!  ;)

 

 

OK,  transmission is mostly a four-speed "sliding-gear" transmission, upgraded with some auto-matic shifting voo-doo.

 

Up front, there are no seals, per se;  there is a gasket on the "throw-out bearing support" ( flange with long neck that bolts to the front of the tranny case ), but there is no seal on the input shaft bearing.  Any oil that sneaks-past the bearing is caught by the T-O Bearing support, and returned to thetranny case via a drain.  The main part of the tranny case is not under pressure, aside from that created by heat / expansion of the oil when hot.  This is vented  / relieved through the input shaft bearing  & T-O beairng support.

 

 

I think you might be overfilling the tranny... in your first photo, there are three square-head pipe-plugs, alomst in vertical alignment.  The bottom plug is the drain plug.  the middle plug ( just in front of the governor) is the filler plug (fill with #10-W oil until it just runs-out of the opening).  The upper plug is an access plug for the shifter fork lock screw. 

 

Suggest you put a pan under the tranny, and pull the middle plug:  if fluid runs-out, let it drain until it stops, then replace the plug.  Now the tranny is filled to the correct level.

 

If the transmission is over-filled, it will leak oil out through the input shaft bearing / throw-out bearing support, and drip out of the bell-housing.

 

Let us know what you find...

 

:)

  • Like 1
Posted (edited)

JR,

If I remember correctly the Tranny takes @ 3 pints of 10wt any more than that and it will pour out of there.

Rear seal usually goes first - easy to get to - pull shaft and e Brake Drum and replace. Its around $25.

Tom

Edited by Tom Skinner
Posted

HA, yeah I over filled the hell out of it by about this much..... 20130909_191123_zps3f2c42ea.jpg

 

 

Next up I'm going to do the rear seal and the U-joints.

Posted (edited)

Yup might end up with a fluid drive clutch! :eek:

Edited by Dodgeb4ya
Posted

I pulled that center plug, let it drain to it's level, and took it for a drive with a few burnouts in between, no problems at all! Thanks guys!!!

Posted

A burn out in a fluid drive car? Thats amazing!

Posted

Actually it does really good burnouts, one tire fire but still a burnout is a burnout.

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