leaking tranny fluid from the dip stick tube
 

i recently installed a new motor in my truck and after everything was buttoned back up, i noticed that there is a gigantic tranny fluid leak coming from the dip stick tube where it meets at the transmission. i remember that there was an o-ring where it mates up but there is no telling how old that is. what can i do to fix this leak?

Re: leaking tranny fluid from the dip stick tube
 

which trans mission? there is a rubber grommet on the tip stick that needs to be replaced put some good sealant on it put ti back together let it sit a day you should be good to go

Re: leaking tranny fluid from the dip stick tube
 

If it's a turbo 350 or 400, go get a newer style tube & dipstick. It has a large grommet instead of the O ring & does not leak. Also, are you sure you have the right tube/stick? If not you may be over filling which will cause leaks and other more costly tranny repairs.

RD

Re: leaking tranny fluid from the dip stick tube
 

its the original stick and its a th350. can i find a new grommet for it?

Re: leaking tranny fluid from the dip stick tube
 

advance auto carrys them in there help section

Re: leaking tranny fluid from the dip stick tube
 

If it's not already, the dipstick needs to be bolted to the transmission/engine or it will move around and leak again after a short while.

Re: leaking tranny fluid from the dip stick tube
 

i dont think that there is anywhere on the dip stick to bolt it down. if the truck is sitting level, does it mean that there is too much fluid in it?

Re: leaking tranny fluid from the dip stick tube
 

Are you talking about a small leak or is it pouring out? I had one that was pouring, and was told there was a vent tube that was probably clogged or pinched. It wasnt a trans I was going to use anyway, so I never looked any further.

Re: leaking tranny fluid from the dip stick tube
 

I put a new O-ring on mine and wrapped a little Teflon Tape around it and it hasn´t leaked since.

The tube is also bolted to the Transmission like Rons86 said.

If it isn´t tight and can move around, you will never get it sealed right.

Re: leaking tranny fluid from the dip stick tube
 

I had that same problem. I tried using a new one with the o-ring but didn't work, so I taped it but got worried that the heat would melt the tape and end up inside. I finally found one at the junk yard that had the grommet. New grommet from O'reilly's and it does need to be bolted down. Might have to tack weld a tab if nothing to mount with.

Re: leaking tranny fluid from the dip stick tube
 

If it has an O-ring, you can't put a grommet on it because the tube is too big. The newer style has a narrower tube to acomodate the grommet. I can tell you this, Advance, OReillys, & Autozone do not carry the newer style. I found one at a ma & pa auto parts store($14).... you may have to look on line for one, or maybe try a CHevy dealer. & yes it does have to be bolted to the upper tranny bolt. There is a bracket on the tube for this.

RD

Re: leaking tranny fluid from the dip stick tube
 

yeah, mine is bolted to the transmission. ill try the teflon tape.

Re: leaking tranny fluid from the dip stick tube
 

Fixed ours like this - cleaned the tranny hole and dipstick end with some brake cleaner on a rag, got a new o-ring and put thin film or black ultra silicone in the tranny hole and a little more on the dipstick end. Bolted the dipstick up and let it sit over night. Did the same with the kickdown cable. No more leaks !!!