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-   -   leaky transmission on a old Olds motor (https://oldsmobileforum.com/forum/general-tech-help-12/leaky-transmissin-n-old-olds-motor-1044/)

grant 03-29-2007 12:21 AM




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I have a 1970 Olds 350 rocket w/a leaky transmision. it seems to leak while it is sitting, but not while the car is running. This motor and trans is in a 1930's street rod, and it sits alot(not driven often). The motor tends to run hot, and I have seen steam rise out of the dipstick when checking the fluid on one occasion. The car may not be driven for months at attime, and there is a good size puddle of tranny fluid under the trans. I would appreciate any help.


thanks


grant



kachina_labala 04-04-2007 11:46 AM

where does the leak come from? Front / rear top / bottom?

cammerjeff 04-04-2007 12:07 PM

Usually when a trans leaks only after the car sits idle for a few
weeks it is caused by the torque converter draining back into the pan.
(Usually the torque converter holds 1 to 3 qts of fluid depending on
trans type) This causes a "OVERFILL" condition and the extra fluid
finds its way out of the weakest seal in the trans.

In the case of my 66 Lemans with a 2004R it is the rear main. If
the trans works well other than this problem, I would suggest living
with it, you have a couple of options.



1 - start the car weekly and let it run untill all the fluids come up to temp.



2- drain 1 or 2 qts of fluid out of the trans when it is going to sit for long periods (I do this every winter on the Lemans)



Other than that it will require a rebiuld of the trans.



Just my experiance.



Jeff R




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