306 2.0 Turbo Gearbox
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  1. #1
    Tadpole
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    Default 306 2.0 Turbo Gearbox

    I'm looking at fitting a XU10J2TE to a N3 306, I'm a bit worried about the BE3 I've currently got fitted won't handle the torque for long and was thinking of fitting a gearbox out of a turbo diesel as from what I've read they can handle the torque and have ratios better suited to a torquey engine. What model gearbox are people using that is a straight forward swap? From a 405 1.9TD or another model? Realisticly in this particular application the gearbox will never see maximum boost/torque in 1st or 2nd gear, only in 3/4/5. Should this be enough to keep the current gearbox?

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  2. #2
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    250 Nm according to PSA - http://www.peugeot-citroen-moteurs.f...e_publique.pdf

    The MCM 6 speed box is rated at 300 Nm.

  3. #3
    1000+ Posts PeterT's Avatar
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    Ideally you need either an ML or ME gearbox, from V6, Turbo etc. However, plenty have just used BE.

  4. #4
    Tadpole
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    What is the usual weak point on the BE3 gearboxes, is it a wear issue with high torque or a potential catastrophic failure? Is is a gearset or the final drive that fails?
    Thanks

  5. #5
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    The original gearbox mated to that motor would seem a good bet - which should have been an ML/5.

  6. #6
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  7. #7
    Tadpole
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    I've got the engine only, no gearbox. From what I've found (I'm still relatively new to Pugs, correct me if I'm wrong) the ML/5 can be found on V6 406's, and 2.1TD 406's and Xantias as well as anything that originally had a XU10J2TE. Are there any differences in bellhousings between any of these combinations? Any markings that I can use to identify if it fits or is it by sight only? What's the difference between the ML5C and ML5T?

    I know I can stick with the BE3/5 but if it's a straight forward conversion, I can find the parts and wont cost the earth I may as well do it and then I won't worry as much about killing the transmission down the track.

  8. #8
    Fellow Frogger! Bluey's Avatar
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    Speaking from experience, a BE3 gearbox & standard clutch will run a XU10J2TE at 15psi on standard turbo & injectors all day everyday, in any gear, without issue. It will make circa 110kW at the wheels by 3500rpm which works out to about 200hp and 300Nm of torque @ the crank (Depending on ECU).

    The weak parts of the the BE3 box are the spider gears in the standard differential. Fit a Quaife & this issue is resolved.

    The idea that turbo engines should run wide gear & tall diff ratios is a fallacy. You run a CR box just like an atmo motor. An Mi16 gearbox with the 4.4 diff drives beautifully attached to a XU10J2TE. A VTS or S16 would also be a great choice as would a GTi6 gearbox as you have the 306 chassis.

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