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Thread: Which Gearbox???

  
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    benny's Avatar
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    Which Gearbox???

    Is there anyone on the forum that could check which gearbox they have in their MK3 2.0 16v Astra Sport?

    It's just that I had a 2.0 16v Astra Sport a few years ago and it used to do 40mph in 1st but the one I've got now only does 35 in 1st

    The gearbox in mine is an F18. Engine is an ECOTEC X20XEV.
    Astra F MK3 2.0 16v Sport - X20XEV, K&N Cone

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    you must have had f20 in before now then, if u want another they are easy to find.
    John L

    MK4 GSI

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    Isn't the F20 the Box from the 4x4 Calibra Turbo?

    Do you have a MK3 2.0 16v? If so, what do you get out of 1st?
    Astra F MK3 2.0 16v Sport - X20XEV, K&N Cone

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    yeah mate, its 1.8gsi version so not sure about gearbox. think i get about 35 too.

    have u bought f18 new?
    John L

    MK4 GSI

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    The F18 came with the motor when I bought it in January. I was looking forward to doin 40 in 1st again!
    Astra F MK3 2.0 16v Sport - X20XEV, K&N Cone

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    u can pick up a f20 for quite cheap if u want one, might be selling one sson, only want £40 for it as i bought it and dont need it. but your in croydon lol thats a mission from mine!
    if not there are plenty on migweb
    John L

    MK4 GSI

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    Cheers for the offer. I think I'll do a bit more research into the gear ratio's and dates that gearboxes were installed to be certain which box I had in my last one!
    Astra F MK3 2.0 16v Sport - X20XEV, K&N Cone

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    Mmmmm, F20!! The alleged gearbox, that Vauxhall never made, and never knew anything about, yet some people still seem to have them in their cars!!!

    There are about 4 different F18 gearboxes, all with different ratios. The last two figures equate to the stress the gearbox can withstand in torque lb/ft

    i.e an F18 gearbox will take 180 lb/ft of torque, where as an F23 will take 230 lb/ft (new Gsi Turbo has this one), and an F20 (if there was such a thing!) could take 200 lb/ft

    However, you can select which ratio box you want in order to achieve better acceleration / top speed. You may have a new F18, but the ratios could be different from your old box.

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    Cheers for that. Very enlightening! Is there any ID on the box to tell me the ratio's?
    Astra F MK3 2.0 16v Sport - X20XEV, K&N Cone

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    According to my book a mk3 astra receieved the following

    model engine gearbox final drive ratio
    sport c18xe c20xe f16/f18 3.45/3.74.1
    gsi c20xe x20xev f20/f18 3.55/3.74.1

    The gear ratio can be found on a plate attached to the gearbox along wiht the type of box.

    Hope this helps

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