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  1. #1
    Registered Member One Ring
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    What Else To Do When Changing Tranny

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    Ok so I'm getting ready to put a new transmission in my 02 a4 quattro 1.8t. My second gear is jacked and I'm done only having 4 gears. I plan to also do the rear main seal and the pilot bearing while I'm in there. It already has a newer clutch that works great. What else should I do while I have the trans out of the way?

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  2. #2
    Veteran Member Four Rings Spike00513's Avatar
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    Mar 05 2013
    AZ Member #
    110766
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    Earth
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    Quote Originally Posted by Jarrodg1993 View Post
    Ok so I'm getting ready to put a new transmission in my 02 a4 quattro 1.8t. My second gear is jacked and I'm done only having 4 gears. I plan to also do the rear main seal and the pilot bearing while I'm in there. It already has a newer clutch that works great. What else should I do while I have the trans out of the way?

    Sent from my Pixel 2 XL using Audizine mobile app
    I have a spare but it's a 6-speed. If you could use any parts from it.
    However, maybe they share some parts? Such as certain gears.

    Brand new, or new to you?

    02 1.8T would be 5spd. 04-05 is 6.

    I wonder how it happened, and why 2nd.

    Well, rear main seal is accessible. As are other things like pilot bearing.
    I'm thinking...
    Well for starters, have you ever done a rear main? It's tricky. Takes being careful to get the PTFE seal right. I only did it on a 3L before though, not a 1.8T. And used a cut up soda bottle as an install tool.

    Hoping to come back later with more info/answers.

  3. #3
    Veteran Member Four Rings gmudan's Avatar
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    May 03 2009
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    41995
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    A6, Q5, A4 b8
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    Throw out bearing, and maybe the slave cylinder because its easy to make sure its properly set when the transmission is off.

  4. #4
    Veteran Member Four Rings jjvwg's Avatar
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    Jan 01 2012
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    2004 A4 Avant
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    I would not touch the rear main seal unless there is reason to change it due to leaking.

  5. #5
    Senior Member Three Rings Gin+'s Avatar
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    Apr 16 2015
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    CNY Syracuse

    Quote Originally Posted by jjvwg View Post
    I would not touch the rear main seal unless there is reason to change it due to leaking.
    I agree with this guy.
    They're not scared of you. They're scared of what you represent to 'em.

  6. #6
    Registered Member One Ring
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    Jun 07 2018
    AZ Member #
    420202
    Location
    Bradenton, FL

    Quote Originally Posted by Spike00513 View Post
    I have a spare but it's a 6-speed. If you could use any parts from it.
    However, maybe they share some parts? Such as certain gears.

    Brand new, or new to you?

    02 1.8T would be 5spd. 04-05 is 6.

    I wonder how it happened, and why 2nd.

    Well, rear main seal is accessible. As are other things like pilot bearing.
    I'm thinking...
    Well for starters, have you ever done a rear main? It's tricky. Takes being careful to get the PTFE seal right. I only did it on a 3L before though, not a 1.8T. And used a cut up soda bottle as an install tool.

    Hoping to come back later with more info/answers.
    New to me. It's was only $350 and it works. Couldn't afford to get a new or rebuilt one. I wish I could put a 6 speed in but I've heard there are more modifications required, that I want to make to this car. Thanks for the offer though. Apparently (according to the shop) the synchros go bad on these transmissions regularly. I guess 2nd gear was the one that decided to go first? It won't fully engage 2nd gear.

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  7. #7
    Registered Member One Ring
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    Jun 07 2018
    AZ Member #
    420202
    Location
    Bradenton, FL

    Quote Originally Posted by gmudan View Post
    Throw out bearing, and maybe the slave cylinder because its easy to make sure its properly set when the transmission is off.
    Thank you, I will look into these

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  8. #8
    Registered Member One Ring
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    Jun 07 2018
    AZ Member #
    420202
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    Bradenton, FL

    Quote Originally Posted by Gin+ View Post
    I agree with this guy.
    Why do you guys say this? Just curious. I know it's something that goes bad on high mileage cars and I figured I'd do it while I was in there. Didn't look too difficult from that research I did but, I could be gravely mistaken. Please elaborate

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