Transmission overfill

Burge_Man

Well-known member
so my transmission was supposedly broken according to the shop. well i brought it home instead of them having to rebuild it and they said they had filled the fluid up well they overfilled it so is there a problem with that and the only problem with the tranny was a vaccuum line.
 
HI
Don't take offence but you did check the tranny fluid with the motor running and in park?? a lot of people don't know this.. and yes over fill is not good it can blow out seals....
Tim
 
yea i checked it in drive but no change i am about to go outside and try again just to see what happens. Is there a certain procedure i need to follow for draining fluid?
 
Is the filter and gasket new? Otherwise I'd replace it while I was at it. Just drop the pan, change the filter, and button it back up with the new gasket.

If it's a new filter/gasket setup, I've known people that loosen 2 or 3 bolts in the corner of the pan and let some drip out. I've never been a big fan of this myself tho. A filter/gasket kit isn't that expensive.
 
I think its easier than dropping the pan if you want it to be. You can remove one starter bolt on my 66 Falcon and then I am pretty sure you can remove the filler tube. Not sure where the fluid level is typically within the tube though. It might spill out as soon as you remove the tube or you might have to do a siphon through the naked hole. If you had a turkey baster you could remove fluid with it through the hole I would bet.

Saves you a gasket. Might make a mess though, haven't tried it myself.

-Dan in Atlanta
 
I overfilled once and found it easiest to disconnect the tranny cooler line at the radiator. Then you can slip a hose over it, stick the hose in a jar and start the engine up until you've drained a pint or two off. A helper is a real must for this as the fluid comes out pretty quick!

The only tricky part is checking the manual to see which of the lines has fluid coming OUT of the tranny. If you pick the wrong line, fluid will come out of the cooler instead of the line.
 
Your converter should have a plug. You can get fluid out of the converter as much as its overfilled, or approx., then if you have to add after idling and driving for a bit to recirculate from the pan to the converter

Drive and check it after 5 min of driving, and adjust accordingly (either drain more from the converter, or if you have to add some, add it while running in Park.)

Let us know how that works.
 
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