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Thread: Auto to Manual Conversion.

  1. #1
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    Auto to Manual Conversion.

    Hi all, just popped across from the D4 area to ask a quick question.
    How hard, read expensive, is it to replace an auto gearbox on the back of a 300 Diesel engine to a manual? Would it require removal of the engine or would you be able to work from underneath?
    The only experience I've had with changing gearboxes was with my 998 Mini and I used to just drop the front subframe out from underneath.
    Thanks
    Scott

  2. #2
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    You can do it from underneath, cost will depend on cost of parts if you can do it your self or need to farm the work out.

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  3. #3
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    As noted, can be done from underneath, but the box and TC are heavy, so best bet is to jack the car up on all 4 corners as high as you can, so you can get a transmission jack under the whole lot. You can do the box and TC separately but the alignment can be a bitch to get right in close quarters and you can damage the TC input shaft seal if your not careful.

    Remember you'll need a manual pedal box and clutch master as well.

    Also, remember to join up the inhibit switch wiring when it is removed from the box or you won't be able to crank it...
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    you have to ask "why would you want to?"...

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    Quote Originally Posted by *RR* View Post
    you have to ask "why would you want to?"...
    Auto re-builds are expensive, auto's are slow, auto's have no control offroad... etc.

    And for the record I had a 300tdi auto.

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    Quote Originally Posted by MR LR jnr. View Post
    Auto re-builds are expensive, auto's are slow, auto's have no control offroad... etc.

    And for the record I had a 300tdi auto.
    Come again? What history book I'd you get that out of? Bit of a sweeping statement don't you think? Your 300tdi Auto was crap off road so all autos are?

    "All wood burns, so all that burns is wood?"...
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Quote Originally Posted by bacicat View Post
    Come again? What history book I'd you get that out of? Bit of a sweeping statement don't you think? Your 300tdi Auto was crap off road so all autos are?

    "All wood burns, so all that burns is wood?"...
    We are talking about 300tdi autos... That is what this conversation is about, is it not?

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    For a start, that's not what you said, I have highlighted the line you made that I have issue with. Also, there are different autos, which one are you referring to?
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Quote Originally Posted by *RR* View Post
    you have to ask "why would you want to?"...
    I can understand exactly why you'd want to.
    Basically people either like autos or they don't. I don't. That's the opinion side.

    The fact side:
    Manuals are more efficient. Compared to 4sp autos, a lot more efficient.
    They give better engine braking.
    They produce less heat.
    Fewer oil lines and coolers.
    They don't change gear when you don't want them to.

    Minibloodhound. It's probably easiest to swap your entire pedal box too.

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    Quote Originally Posted by MR LR jnr. View Post
    ZF 4HP22 Auto re-builds are expensive, 300tdi auto's are slow, 300tdi auto's have no control offroad... etc.

    And for the record I had a 300tdi auto.

    I just didn't like the gearbox.
    Quote Originally Posted by bacicat View Post
    For a start, that's not what you said, I have highlighted the line you made that I have issue with. Also, there are different autos, which one are you referring to?
    There you go, I felt it unnecessary originally to point out in a 300tdi auto conversation, that I was talking about 300tdi's. I don't know if you're a troll or a grammar nazi, or just in love with automatic transmissions.

    But I've never liked any I've driven off road. That's personal preference.

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