What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Converter Drain Back

Babaganoosh

Babaganoosh

1 ton status
 Premium
GMOTM Winner
Joined
May 30, 2007
Posts
18,470
Reaction score
12,924
Location
Phoenix Arizona
So on my 82, I have a 4l60e trans like most of you know. The truck gets parked for some time and always dumps quarts of ATF out between the trans and transfer case. The 4l60e has a weep hole above the pan to the tail shaft and it eats the silicone away and leaks.

When I built the truck I pushed the engine up 1.5 inches over factory and have the trans at the factory height using a factory cross member, I'm pretty sure I designed a flaw in the trans is tilted further back and causing more drainage coming from the pan.

I thought about drilling a hole in the adapter housing of the trans to put the fluid into a hose, but how do I get it back into the trans when it starts up? An expansion tank won't work because the fluid would be cold but wont get sucked back in?
 
Yes that is a wet area, t case input is sealed. Any oil in the tail area should drain into he pan.
 
Only thing I got out of that whoever thread was the post about a cracked case allowing to much oil in the adapter. Not 100% sure what op was talking about "bushing" leaking oil into adapter? Was the oil filling adapter? Or just present?
 
Wes Harden said:
Only thing I got out of that whoever thread was the post about a cracked case allowing to much oil in the adapter. Not 100% sure what op was talking about "bushing" leaking oil into adapter? Was the oil filling adapter? Or just present?
Click to expand...
I think hes talking about the bushing for the tail shaft.
 
well I should think the bushing for the tail shaft should be wet and leaking oil, if it didn't I would be concerned, it wouldn't last long either
 
066 appears to be bearing/bushing, 074 looks to be a seal, but the exploded view numbered parts are named so I am not sure. I would expect part 066 to be wet if it is indeed a bushing for the out put shaft.
 
Wes Harden said:
066 appears to be bearing/bushing, 074 looks to be a seal, but the exploded view numbered parts are named so I am not sure. I would expect part 066 to be wet if it is indeed a bushing for the out put shaft.
Click to expand...
That is what I'm thinking, maybe mine is shot? The trans is 5 years old.
 
So where is your trans leaking oil to outside ? I don't have any weep holes on my 700r4 np205 that I have noticed. I didn't think there were any other than the air vent near the top of trans.
 
Wes Harden said:
So where is your trans leaking oil to outside ? I don't have any weep holes on my 700r4 np205 that I have noticed. I didn't think there were any other than the air vent near the top of trans.
Click to expand...
When the torque converter drains, it has a weep hole above the oil pan that goes into the extension housing, it sits there until it leaks out to where the trans and transfer case meet. I think the ATF is eating the silicone to where it just dumps on the ground. Because the engine is higher then the trans it has to much angle so it just dumps the entire converter out.
 
ahh so it's the gasket between the adapter and the t case that leaks. In my experience when the converter leaks down some of the oil end up on ground under the bell housing. Yours being tilted might indeed fill the tail shaft. Maybe a deep pan would help ?

yeah don't plug that drain back
 
Wes Harden said:
ahh so it's the gasket between the adapter and the t case that leaks. In my experience when the converter leaks down some of the oil end up on ground under the bell housing. Yours being tilted might indeed fill the tail shaft. Maybe a deep pan would help ?

yeah don't plug that drain back
Click to expand...
Even then wouldn't I need to add more fluid because the pan will hold more fluid?

This is a weird issue, I have been beating myself in the head for some time. I might just try and lift the trans up more if the pan isn't flat. My garage door broke and I haven't felt like working on this yet.
 
6872xtc said:
What were the results with a gasket? Same?
Click to expand...
I have tried everything, gasket, multiple different RTV's even tried both at the same time. I have also put anaerobic sealer on it.

The only fix I have been able to do is just start the truck every few days to keep the converter full.
 
True, you'd have to add more fluid. What putting the engine back into it stock angle ? cross member interference ?
 
Wes Harden said:
True, you'd have to add more fluid. What putting the engine back into it stock angle ? cross member interference ?
Click to expand...
It would hit the cross member(ORD small block) and the diff would smash the balancer. When it compresses the coilovers it leaves a 1/4 gap between them. This is how I was able to keep my truck so low and have 6in of bump and 7 inches of droop.

I designed a flaw into the front end, but I think the engine is at 5 degrees tilt back.
 
So are we concluding that you can't park an automatic vehicle pointed uphill? All the Carolina squat trucks leak?
 
You must log in or register to reply here.

Latest Posts

Top Bottom