How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Toyotapro Your Own Question
Toyotapro, ASE master tech
Category: Toyota
Satisfied Customers: 9974
Experience:  ASE Certified, 10+ years Lexus and Toyota Certified
Type Your Toyota Question Here...
Toyotapro is online now
A new question is answered every 9 seconds

2004 toyota sienna: transmission fluid..leaking..000 miles..maintained

This answer was rated:

It looks like transmission fluid is leaking in my 2004 toyota siena (it only has 77,000 miles!). We have maintained it properly. Is this normal?
Where exactly is the leak coming from on the transmission?
Customer: replied 7 years ago.

well....the mechanic spoke with my husband & he isn't too clear on this. The mechanic said that these cars don't have gaskets but the transmission is in three pieces & the lubrication is leaking into the engine.


Does that make any sense at all?

No that does not make sense. One other thing I should have asked, is this an al wheel drive model or just a standard Sienna? There were some common problems with the all wheel drive models. Leaking into the engine????? Is this a toyota dealer or a back-woods mechanic?
Customer: replied 7 years ago.

It's just a standard model. It is a toyota dealer. Unfotunately, my husband did not understand what the mechanic was telling him.....


If I get more information tomorrow from the mechanic, can I email you then?

You need to clarify. I have seen very few issues with these transmisions, they use them in the Sienna, Highlander, Lexus Rx330, etc.....this is a very large production unit and has had very few problems. $2000 is very can almost pay for a transmission replacement for that, I need to know exactly what you were told or what you were quoted. I would recommend a second opinion from a different dealer if you have not noitced fluid leaking from the transmission on your garage floor. Are you sure that the leak is transmission fluid and not from the engine (engine oil)???
Yes you can reply back to this tomorrow if you would like, I check my messages a few times a day and am on-line all evening.
Customer: replied 7 years ago.


Me again...All toyota told me was the the case & the pan are leaking. They have to fix, reseal & realign the transmission. They said it doesn't leak cause it's a pressurized system & will only leak when it's being driven.


Does this help?




Ok thanks, XXXXX XXXXX is some help. I have never seen a "case"leak. A pan gasket yes..sometimes but this is only a minor thing and about $200 to repair that. The case....they need to give you more specific information on this, I have never seen this in my region (southeast) and in my opinion you would be better off just replacing the transmission at that mileage rather then have them seperate the transmission and reseal it. I would recommend you speak with the service manager and see if they will "goodwill" the repair or at least do a 50/50 split with toyota.
Toyotapro, ASE master tech
Category: Toyota
Satisfied Customers: 9974
Experience: ASE Certified, 10+ years Lexus and Toyota Certified
Toyotapro and 6 other Toyota Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
< Previous | Next >
  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland

Meet The Experts:

  • Chris (aka-Moose)

    Chris (aka-Moose)

    Auto Technician

    Satisfied Customers:

    16 years of experience
< Last | Next >
  • Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Auto Technician

    Satisfied Customers:

    16 years of experience
  • Marty's Avatar


    ASE Certified Technician

    Satisfied Customers:

    ASE & Bosch Master Tech. 30 years experience.
  • Amedee's Avatar


    Toyota Technician

    Satisfied Customers:

    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
  • Anthony's Avatar


    ASE Certified Technician

    Satisfied Customers:

    ASE Master Automobile Technician with over 20 years exp. in this field.
  • Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    Toyota tech. ASE Certified Technician
  • Skyvisions's Avatar


    ASE Certified Technician

    Satisfied Customers:

    Toyota Master Diagnostic
  • Genchi Genbutsu's Avatar

    Genchi Genbutsu

    Toyota Master Technician

    Satisfied Customers:

    Toyota Certified Master Diagnostic Technician, ASE Master Technician with L1 Advanced Engine