* Overfilled Transmission: This is the simplest, but potentially damaging, explanation. Even a slight overfill can create significant pressure, forcing fluid out the dipstick tube. Check your fluid level *carefully* with the engine off and the car level. An overfill is easily remedied, but driving with it can cause severe damage.
* Internal Transmission Pump Failure: A failing pump can't maintain proper pressure, leading to erratic behavior and potentially causing a pressure build-up that forces fluid out. A failing pump often also results in no shifting or very hard shifting.
* Internal Transmission Leaks: A significant internal leak, perhaps in a valve body, might cause a pressure imbalance. Fluid escaping internally can create pressure changes that force fluid out the dipstick.
* Clogged or Restricted Transmission Filter: A blocked filter restricts fluid flow, increasing pressure and causing the symptoms you describe.
* Transmission Cooler Lines: While less likely to directly cause fluid expulsion from the dipstick, a leak or blockage in the transmission cooler lines could contribute to the pressure issues. Inspect these lines carefully.
* Worn or Damaged Valve Body: The valve body controls fluid flow within the transmission. Wear, damage, or failure can lead to incorrect pressure regulation and the described symptoms.
Why it's crucial to address this immediately: Driving with these symptoms will likely cause catastrophic transmission damage. The lack of lubrication and the excessive pressure will destroy internal components quickly, leading to a very expensive repair or replacement.
What to do:
1. Do NOT drive the car. Tow it to a qualified mechanic specializing in Northstar engines and automatic transmissions. This isn't a DIY repair; attempting it risks further damage and injury.
2. Describe the symptoms precisely to the mechanic. The information you've provided is valuable.
3. Be prepared for a potentially expensive repair. Transmission work is labor-intensive and parts can be costly.
Attempting to diagnose and repair this yourself is strongly discouraged. The consequences of misdiagnosis could be substantial. Professional help is essential.
