Transmission Leak
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Elder User
Joined: Aug 2003
Posts: 624
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From: Houston, TX
Transmission Leak
Got something that is really puzzling me on my '91 3.0 aero.
As long as I drive under 60 mph everything is fine. If I go over sixty, I lose transmission fluid that leaks out between the motor and the bellhousing. What is happening? Any suggestions would be welcome.
THanks,
Klaus Cook
Houston, Texas
As long as I drive under 60 mph everything is fine. If I go over sixty, I lose transmission fluid that leaks out between the motor and the bellhousing. What is happening? Any suggestions would be welcome.
THanks,
Klaus Cook
Houston, Texas
Senior User
Joined: Jan 2004
Posts: 315
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From: northern mn
Sounds like you have been pulling things or running hard with your air on, if this is the case I think your case has X-panded and your front seal is leaking I dont know what to do about it though. When it happened to me I went and got another trans from junk yard and put that in. If you do change tourqe converter also. They can not take it for very long seems to be a on going problem.
Junior User
Joined: Aug 2003
Posts: 83
Likes: 0
From: Bergen, Norway
Trans A4LD front seal leak
First: What's happening:
The oil in an automatic transmission is subjected to heat when u drive. The heat is generated by friction in the trans and some heating is normal. The heat causes the oil to expand and too much heat will cause the oil to foam / "boil". It will then find a way to relieve the built-up pressure, usually it flows out the vent or out the front seal.
(I am holding a front seal in my hand right now...and it is going in tomorrow).
Mine have had one serious heating incident after wich I added an extra trans oil cooler. That helped. Lately I've had just a little leak, tried to fix it by adding "automatic transmission sealer". That just made it much worse....
Now I have to change the seal.
Suggestion:
There are two things that will hurt (rubber-) seals: HEAT and AGE.
In your case I'd guess age is an issue, AND it has probably been hot a cpl times at highway speeds.
This is what you can do:
1: Check and change oil and filter, both of correct type! Old contaminated oil heats up easier than new, clean oil.
2: Check band adjustment.
3: Buy an extra trans oil cooler, (bigger the better), and mount it in front of the rad as specified. This is a low-cost-easy-to-do thing and an improvement anyway.
4: Start looking for a replacement tranny...
5: Spend apprx $300 on having a shop change the front seal. You may be lucky and drive it forever after...
Good luck
Oey
The oil in an automatic transmission is subjected to heat when u drive. The heat is generated by friction in the trans and some heating is normal. The heat causes the oil to expand and too much heat will cause the oil to foam / "boil". It will then find a way to relieve the built-up pressure, usually it flows out the vent or out the front seal.
(I am holding a front seal in my hand right now...and it is going in tomorrow).
Mine have had one serious heating incident after wich I added an extra trans oil cooler. That helped. Lately I've had just a little leak, tried to fix it by adding "automatic transmission sealer". That just made it much worse....
Now I have to change the seal.
Suggestion:
There are two things that will hurt (rubber-) seals: HEAT and AGE.
In your case I'd guess age is an issue, AND it has probably been hot a cpl times at highway speeds.
This is what you can do:
1: Check and change oil and filter, both of correct type! Old contaminated oil heats up easier than new, clean oil.
2: Check band adjustment.
3: Buy an extra trans oil cooler, (bigger the better), and mount it in front of the rad as specified. This is a low-cost-easy-to-do thing and an improvement anyway.
4: Start looking for a replacement tranny...
5: Spend apprx $300 on having a shop change the front seal. You may be lucky and drive it forever after...
Good luck
Oey
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