727 Trans pan leak?

[a6t9vette]

I had noticed that some of my trans pan bolts where a little loose so I retorqued to spec, but looks like the old gasket didnt like that so now I have a decent leak.

Is there an easy way to do this, since there is no drain plug im guessing I should just try and drop one corner and get most of the fluid out that way. Any tricks that im not thinking of?

Also im obviously going to loose alot of fluid, Assuming I catch it all I can make a good guess at what came out, but how much fluid is actually in the pan if full, I know the spec is 15.5 pts (no aux cooler, just the radiator), but how much stays in the converter, etc?

Thanks

 

[droptop]

I think there should be about 2 or 3 quarts in the pan. There is no way of removing the pan without making a mess. All you can do is try to contain it with a BIG drip pan.

 

[Big John]

Use as big a drain pan as you can, loosen a corner and work down the sides from there. It will make a mess, expect to use some speedi-dry somewhere along in the process. Crack the corner loose and let it fly.

Buy 7 or 8 quarts of your favorite flavor trans fluid and put in 5 to start (assuming you drained the convertor too). Run the car in neutral and shift through the gears (tires can be on the ground). Check the fluid in neutral and get it so its just below the "add" mark. Run it on the road until its hot and check again,

 

[Big John]

Oh... and adjust the bands per the service manual while its apart.

 

[a6t9vette]

How much does the converter hold, comparing some of the numbers below sounds like 5 qts, although that sounds high to me? I know the fluid in the car has less the 1000 Miles, since the trans had some work done to it, so im not sure draining would add any benifit....

 

[Jim S.]

I will let someone else answer the fluid question. Just want to comment on my pan gasket leaks. I never could get the 727 tranny to seal until I bought a re-usable gasket from the dealer. Cork and neoprene just didn't work for me. Of course you have to make sure the pan is flat checking with a straight edge first and only torque to 150 in.lbs. The reusable gasket was made for the 518 tranny but works well with the 727. It has metal inserts around the holes and two sealing lips on each side. There are a couple of spots where only one sealing lip lines up with the pan but, seems not to be a problem. It is a little thicker so make sure your bolts are long enough. Just thought I would share my leak solution. I still wish the thing was a stick!

Dealer part #2464324AC

http://auctionworks.com/StoreFrontProfi ... i=12019478

 

[mcmopar]

You also might want to look into MP's deep pan kit. I put one on my Charger back in the late '90's. The deep pan has a drain plug so it will be easier to work on the trans or change fluid in the future.

 

[V269]

You also might want to look into MP's deep pan kit. I put one on my Charger back in the late '90's. The deep pan has a drain plug so it will be easier to work on the trans or change fluid in the future.

Bingo, we have a winner.

 

[Roadcuda]

You also might want to look into MP's deep pan kit. I put one on my Charger back in the late '90's. The deep pan has a drain plug so it will be easier to work on the trans or change fluid in the future.

Bingo, we have a winner.

Yep, I did that with my car also!

 

[ACME A12]

I put the black wrinkle-finished aluminum MP unit on the 518 in my SS/T. Love it. Extra capacity, a drain plug, and a bung to mount my tranny temp sensor. I had to do a little clearancing on the valve body to get it to fit...but it's on there...and it does not leak!

:jester:
ACME

 

[Big John]

If the trans is fresh, then don't bother adjusting the bands or draining the convertor.

I think 3 quarts might be enough to start, but if you do use a deep pan (I suggest that you do) you'll need at least another quart if not two more.

BTW, those deep pans were standard equipment in school buses! I used to get them without the chrome for my tow vehicles.

 

[moparstuart]

I go with the deep finned aluimunum pans on all my 727's those thin pans always leaked on me . The thick ones get better bit for the bolts and gasket to work. They are not cheap but you also get the cooling aspect of the finned pan and trans and cooling is always good . They never leak like my old thins ones did .


these pictures are on the birdible , but the 69 also has the same pan .

 

[ACME A12]

Look! Another hand model...it must run in the family...

 

[69hemibeep]

Look! Another hand model...it must run in the family...