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IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

MY 01 IS300 is Pouring transmission fluid out of the bell housing when on

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Old Aug 19, 2025 | 05:58 PM
  #1  
donbinrunnin's Avatar
donbinrunnin
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Default MY 01 IS300 is Pouring transmission fluid out of the bell housing when on

I just bought the car had no issues with it, Like an idiot i started sliding it hard doing donuts once i found out i had an lsd,
then parked up and car was literally pouring transmission fluid out of the bell housing the flow of the leak was like if i was to unbolt the drain plug and let the fluid drain

if i turn off the car it stops leaking, starts leaking about 25-40 sec after turning on the car transmission didn’t blow i towed the car home
any help to what this can be AND I KNOW ITS ATF NOT MOTOR OIL I would say a seal but the leak was honestly way to bad for me to think it would be a seal i am going to drop the tranny when i have time just wanted some insight as to what you guys think it can be

I ADDED A VIDEO. IN THE VIDEO CAR WAS OFF, THE LEAK WAS TEN TIMES WORST WITH CAR ON AS YOU CAN SEE THE PUDDLE IT LEFT AFTER JUST 1:30 SEC OF BEING ON MAYBE LESS
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File Type: mov
IMG_9556.mov (11.23 MB, 12 views)
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Old Aug 20, 2025 | 03:21 AM
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2001SolarY's Avatar
2001SolarY
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It will be the converter seal or pump seal.
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Old Aug 20, 2025 | 02:09 PM
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The two options as I see them are that the seal behind the torque converter just completely blew out. Your transmission fluid is looking fairly dirty, there's a nonzero chance this was caused by a clog creating excess pressure on an already worn out seal and that double-whammy finally did it in.
The other option would be you literally blew up your torque converter. If that was the case, you probably would have noticed the vehicle stop responding properly to you pretty much immediately.
Either way, the transmission is gonna need to be dropped, and that seal is likely gonna need replacement. Make sure to tape in the seal gently and evenly to avoid an Electric Boogaloo.
Whatever it is, it'll likely be immediately apparent as soon as you take a look at it.
Don't feel too bad - Doing donuts and revving high shouldn't cause an issue like this in basically any circumstance. It was already on its way to this outcome, you just gave it the final push. Just feel lucky it wasn't on the highway.
Aren't you glad you have a RWD vehicle? Good luck!
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Old Aug 23, 2025 | 02:22 PM
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donbinrunnin's Avatar
donbinrunnin
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Originally Posted by 2001SolarY
It will be the converter seal or pump seal.
thank you i have hurd about the pump seal going bad to on these cars once in a blue i will check in more when i have time to drop it and give an update
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Old Aug 23, 2025 | 02:25 PM
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donbinrunnin's Avatar
donbinrunnin
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Originally Posted by DanielleAlek
The two options as I see them are that the seal behind the torque converter just completely blew out. Your transmission fluid is looking fairly dirty, there's a nonzero chance this was caused by a clog creating excess pressure on an already worn out seal and that double-whammy finally did it in.
The other option would be you literally blew up your torque converter. If that was the case, you probably would have noticed the vehicle stop responding properly to you pretty much immediately.
Either way, the transmission is gonna need to be dropped, and that seal is likely gonna need replacement. Make sure to tape in the seal gently and evenly to avoid an Electric Boogaloo.
Whatever it is, it'll likely be immediately apparent as soon as you take a look at it.
Don't feel too bad - Doing donuts and revving high shouldn't cause an issue like this in basically any circumstance. It was already on its way to this outcome, you just gave it the final push. Just feel lucky it wasn't on the highway.
Aren't you glad you have a RWD vehicle? Good luck!
Thank you so much i really appreciate the insight the vehicle was still drivable in every gear just did not want to blow it up on the way home. I will pull the transmission as soon as i can and give an update on the progress when i have the time. and i will say before that incident happened it was the most fun i had in any car 10/10 lol
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