Replace transmission dip stick fill tube or O ring

JJHStang · Sep 18, 2024

leaking automatic transmission fluid not sure where it is coming from. Not sure what transmission I have. Car came with a 302 2bbl and I believe still original transmission.
I was told it might be the O ring where the transmission fill tube tits into the transmission.
Trying to find DIY video on how to replace the O ring or the whole fill tube with new O ring.
I have attached a picture that shows the fluid drips in one spot and pools into another place. I just happened to look at my drip pan Monday 09/17.

Barrysmach1 · Sep 18, 2024

Pretty simple ,
Drain fluid from pan
Unbolt dipstick tube from bellhousing.
pull tube straight out.
remove doing from tube.
clean tube
install new oring & lube (important)
Slide tube back into transmission ( do not cut oring )
Reinstall mounting bolt.
refill transmission with fluid.

Bill73Ragtop · Sep 19, 2024

Not sure why you are recommending draining the transmission fluid since the tube itself is not filled. However, the dipstick tube could be very difficult to remove since it may be cemented in place with age and corrosion. In that case, draining the trans fluid -- which can only be done with factory transmission pans by removing the pan and letting all 8-9 qts flow out from the partially lowered pan -- and then removing the pan will allow access to the bottom of the dipstick tube. A small block of wood can be used to tap the bottom of the dipstick tube to push it up. A new pan gasket will be needed (cork recommended)

JJHStang · Sep 19, 2024

Bill73Ragtop said:
Not sure why you are recommending draining the transmission fluid since the tube itself is not filled. However, the dipstick tube could be very difficult to remove since it may be cemented in place with age and corrosion. In that case, draining the trans fluid -- which can only be done with factory transmission pans by removing the pan and letting all 8-9 qts flow out from the partially lowered pan -- and then removing the pan will allow access to the bottom of the dipstick tube. A small block of wood can be used to tap the bottom of the dipstick tube to push it up. A new pan gasket will be needed (cork recommended)

Thank you, I wouldn’t dought it might be stuck. Hope it isn’t

Barrysmach1 · Sep 19, 2024

Bill73Ragtop said:
Not sure why you are recommending draining the transmission fluid since the tube itself is not filled. However, the dipstick tube could be very difficult to remove since it may be cemented in place with age and corrosion. In that case, draining the trans fluid -- which can only be done with factory transmission pans by removing the pan and letting all 8-9 qts flow out from the partially lowered pan -- and then removing the pan will allow access to the bottom of the dipstick tube. A small block of wood can be used to tap the bottom of the dipstick tube to push it up. A new pan gasket will be needed (cork recommended)

Go ahead and take tube out with transmission full and tell me if you get any fluid all over floor, I pulled hundreds of transmission s when I worked at a transmission shop if trans properly filled it WILL run all over floor, you have to remember that fluid level checked while engine running and trans pumping fluid, so yes it's up in the tube.

Paul M · Sep 20, 2024

I just did my O ring last night. If you have a drain plug, drain out 2 qts. If not pull the dipstick with a drain pan under it, you'll leak out less than a qt. Remove the 5/8" bolt that holds the tube onto the back of the bellhousing and pull the tube out. They aren't very hard to pull out, hence the reason they are sealed w/a O ring. Twist it if it's stubborn.