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leaky trans. pan?

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EVIL

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Joined
Jun 30, 2008
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So i have a Hughes pan on my trans. Trans work great.

While it's running, parked or driving there doesn't appear to be a leak.

When I turn it off and look, no leak.

The next day there is puddle under the front passenger side.

This is with the oil level full.

Once the oil level down about a quart and a 1/4 to a quart and a 1/2 it stops leaking for the most part.

I have a trans cooler installed.

I have changed the gasket a few times.

I think it may be coming from the dip stick hole.

When the car is parked is the oil level supposed to be above where the pan meets the case?

D
 
Have you checked your electrical connector on the drivers side? How about the seal on your gear selector shaft? Also look at your tail shaft bushing? If you can wiggle the drive shaft more than 0.020" - 0.030" it is worn out and needs to be replaced and the rear seal will most definitely will be leaking, so it should be replaced as well. The tail shaft bushing can be replaced without removing the transmission.
I ended up installing some dye in my transmission fluid & looking at the area with a black light and yellow glasses to finally find my transmission leak.
 
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I have a cork gasket.

So since the oil is above the pan when full I will schedule another session on my friends lift.
I'll fill it up to spec and clean everything with brake cleaner and try to see where it's leaking.

Thanks.
D
 
Fixed my deep al pan leak by pulling one bolt at a time, spraying some brake cleaner in the hole and putting some rvt at the last few threads and head of the bolts. Not a drop since.
 
Fixed my deep al pan leak by pulling one bolt at a time, spraying some brake cleaner in the hole and putting some rvt at the last few threads and head of the bolts. Not a drop since.

So, do the bolt holes on the case go thru in to the oil?

I can't remember.

D
 
So, do the bolt holes on the case go thru in to the oil?

I can't remember.

D
All of the pan bolts are on the perimeter of the case (none come in contact with the oil), and the only "blind" hole is the furthest one to the back center by the trans mount, the rest are open. From what you described, I am pretty sure you were right with your original idea of the trans dipstick tube "O-ring" (it's probably not called that, but you get it). I've seen them torn when people get lazy installing them and leave the tube half in. Same exact leak. Could also be a cracked TV cable body (just in front of the dipstick), because people get all "willy nilly" tightening down that 10mm bolt onto plastic. That also has a similar seal that rarely leaks, but is sometimes missing because it came out with the cable. The harness, shaft seals, cooling lines and pan leaks would be there all the time in my humble opinion. Hope this helps.
 
All of the pan bolts are on the perimeter of the case (none come in contact with the oil), and the only "blind" hole is the furthest one to the back center by the trans mount, the rest are open. From what you described, I am pretty sure you were right with your original idea of the trans dipstick tube "O-ring" (it's probably not called that, but you get it). I've seen them torn when people get lazy installing them and leave the tube half in. Same exact leak. Could also be a cracked TV cable body (just in front of the dipstick), because people get all "willy nilly" tightening down that 10mm bolt onto plastic. That also has a similar seal that rarely leaks, but is sometimes missing because it came out with the cable. The harness, shaft seals, cooling lines and pan leaks would be there all the time in my humble opinion. Hope this helps.

Hmmm. I see.

I will have to inspect everything thoroughly.

The Trans is a non lock up.

I bought it on here a few years ago as a used Brian Hofers built transmission.

After speaking with the seller for a while I was comfortable with the purchase.

In 3 years or so it hasn’t had many miles put on. 500 to 1000 tops. Other issues were at play.

I was having an issue with a severe rattling noise recently and thought i had a bad deal.

It ended up being the down pipe hitting a couple of spots. I finally found this out yesterday.

I had also ordered a new Dusty Bradford non lock up converter for the install.

After the initial install two or three years ago, the car hasn’t been driven much since then,

The machine work on the two billet main crank caps/bearings was junk and wrecked everything.

The Spinning, Rattling, Banging noise was there from the go and that evidence led to make me believe the motor issue caused the noise.

It didn’t. So then the trans and converter were the next suspects.

From my experience, when you’re building a motor, you either use a top of the line engine builder experienced in these motors like RPE or equivalent and spent the 5 to 10 k or get a factory un touched short block. Any other option is a recipe for disaster. My two cents.

The top end isn’t that difficult to put together if you’re mechanically inclined, have patients, do a lot of research and work with methodic perfection.
Like I try to.


I even questioned Dusty Bradford on the issue thinking it was the converter and he spend some time on the phone with me answering every question as i was positive the converter was the problem. What a great guy.
I was wrong! But a mind tends to wander during these problems.

DUSTY, I APOLOGIZE FOR ANY INCONVENIENCE OR GRIEF I MAY HAVE CAUSED YOU.
YOU SOLD ME A GOOD CONVERTER! Thank you.


I even emailed David Husek about my issue to get his thoughts and possibly purchasing one of his transmissions.
He literally called a few minutes after the email, While he was driving, Is that legal in your state?, and spent quite some time on the phone with me and answered all my question and gave me advise on my problem. He is another superb vendor on here. I would not hesitate getting a trans from him in the future.


This trans has always shifted great and tight.

After what I’ve been thru in the last 10 years I’m grateful the motor and trans are sound at this point.

Now it’s the minor issues that i have to deal with. Like we all do. Things couldn’t be better. :happy:

What is the proper way to bolt up and seal, with gaskets, teflon tape and O rings, the 2 trans cooler lines, TV cable and dipstick tube?

thanks in advance.
D
 
My trans dipstick rubber bushing was brand new.
 
This will sound silly, but, clean ever area you think is leaking first D. Once clean, cover the area with talcum powder, and I do mean cover. Let it sit after filling and the white of the powder will give you a good idea of where the leak is coming from. If not that, then use the dye and black light method.;)
 
That works with inner tubes as well. Good advice. People that stop by the garage always ask why I have a bunch of baby powder on the shelf, Lol. If you can put it on level ground on jack stands while it's cold, then spray the wet area w/ carb cleaner and recreate the conditions where it starts leaking, it should narrow it down some. If it is the dipstick tube, or TV cable- It is going to be easier to pull the crossmember, jack the trans up (w/ a block of wood, and some judgement), pull the 14mm/ or 9/16" bolt out of the bell housing to release the dip-tube, and lower the trans down to proceed. It's some fun see-saw type stuff, but will give you enough room. I've swapped servo washers with the trans in and have a lift, but this is how I would attack it. You shouldn't have to drop the pan to get the job done, even w/ the TV cable (if you are good in tight places and have tiny needle nose pliers). But I'd recommend it, even if just for inspection purposes. Don't use teflon tape or silicone at all!!! If that stuff get's in and jams a valve, you'll have worse problems. My avatar is of me at a burnout contest w/ an Art Carr non lock up trans that me and my ex swapped in 45 minutes before. My friend gave it to me for free after my $5000 billet trans expolded in less than a month (front planet had flat gears, cracked the converter hub, killed the pump). I learned how to rebuild transmissions though :) . Lock up is worth a couple pounds of boost on the big end, and I knocked down 26 MPG highway (had a C6 shadow boxing me that day), but the non lock up worked good even w/ a ton of miles on it.
 
X2 on just the gasket or seal. I changed the tv "top hat" rubber seal in the car after I duffed the first one up. I don't see why you couldn't do the dipstick tube in car either. I used a fiber pan gasket, but I am using a stock stamped pan. If it is the pan, check it for straightness against the case.
 
electrical connector o ring was bad in mine it would leave a puddle at the front under dust cover.. fluid ran along the edge of trans and dripped off at the front,
 
electrical connector o ring was bad in mine it would leave a puddle at the front under dust cover.. fluid ran along the edge of trans and dripped off at the front,


X2
I had the same problem too..it was difficult to verify the source of the leak as it would drip down and along to the front of the transmission pan & torque convertor cover making it appear that the front area of the pan was the source ....finally found the culprit was the "O" ring on the electrical connector on the side. Replaced the whole unit connector & "O" ring and problem solved! You will need to drop the pan in order to remove and install the new connector + hook up the wiring .
FYI....ordered it from Kirban's.

http://www.kirbanperformance.com/pr...ITH+O-RING+for+200-4R+Transmission+#7486.html
 
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