mecmark Posted June 22, 2014 Share Posted June 22, 2014 hi guys I've got a 2.0ltr petrol focus cc 2008 it's got a 5 speed gearbox in it at the moment but as the clutch is on it's way out i'm thinking of perhaps a 6 speed box to split the ratio's a little ( i think its a bit sluggish ) but i'm having problems finding out if they actually fitted a 6 speed box to a 2.0ltr petrol engine and what the gearbox code is? I know they fitted the same parts in the volvo and mazda but again it's all down to what code? Is one of the diesel box's compatible? Quote Link to comment Share on other sites More sharing options...
FOCA Posted June 22, 2014 Share Posted June 22, 2014 With a diesel being so low revving compared to the petrol, the gear ratios may be different (and unsuitable) 6th may be an overdrive on the 6-speed, so will not help performance if so it does not matter how many gears you have, it will not increase power and if 6th is super- high (an overdrive) it will feel even more sluggish in 6th, with having to change down for steep hills etc, the revs may be lower on the m-way for relaxed cruising though Probably not worth the hassle / time/ expense - read this http://www.fordownersclub.com/forums/topic/57752-challenge-16-tdci-6-speed-gearbox/?hl=%2Bspeed+%2Bbox Quote Link to comment Share on other sites More sharing options...
mecmark Posted June 22, 2014 Author Share Posted June 22, 2014 i'm really after a 6 speed box from a 2.0ltr petrol so it's an easy fit either from a ford ,volvo or mazda as they use the same parts. A diesel box would only be a second option Quote Link to comment Share on other sites More sharing options...
artscot79 Posted June 23, 2014 Share Posted June 23, 2014 Its no easy fit mounting points are different the 6 speed has wiring and sensors the 5 speed doesnt the clutch is different the driveshafts as well and the fact it doesnt have enough torque for a 6 th gear a diesel would take it Not all the parts on a mazda or volvo are the same for example the focus has an ib5 or mx75 gearbox however over the years there have been internal changes so a 2008 wont work on a 2001 despite both having the ib5 gearbox You have an old box fitted to the escort mk5 and escort rs2000 the mondeo none that im aware came as 6 speed newer boxes are totally different some twin clutch which wont work simplest way is to swap the engine and gearbox to something else or tine the 2.0 engine which is easier and cheaper take a look http://www.burtonpower.com/tuning-guides/tuning-guide-pages/ford-zetec-e-tuning-guide.html Quote Link to comment Share on other sites More sharing options...
Karl 70 Posted July 11, 2021 Share Posted July 11, 2021 I have a ford focus 08 ij just won't to know if i can use a 1.8 diesel gearbox on a petrol 1.8 engine Quote Link to comment Share on other sites More sharing options...
JW1982 Posted July 11, 2021 Share Posted July 11, 2021 Yes you you can but this conversion requires quite some modifications The 1.8 Duratec HE Petrol engine has the 5-speed IB5 gearbox. The 1.8 TDCI Diesel engine uses the 5-speed MTX75 gearbox. This gearbox is also used on the 2.0 Duratec HE. This conversion requires at least the following parts: * Gearbox with the correct gear ratio. * Both gearbox mounts. * Both driveshafts of a 2.0 Duratec HE. * Dual mass flywheel of a 2.0 Duratec HE. * Clutch of a 2.0 Duratec HE. * Shifter cables. * Hydraulic clutch lines. In my opinion this upgrade is only worth it on higher power engines (like the Fiesta MK6/MK6.5 ST) on which damage of the IB5 gearbox is quite common. 2 Quote Link to comment Share on other sites More sharing options...
DaveT70 Posted July 12, 2021 Share Posted July 12, 2021 On 7/11/2021 at 7:23 AM, Karl 70 said: I have a ford focus 08 ij just won't to know if i can use a 1.8 diesel gearbox on a petrol 1.8 engine No, the ratios are all wrong Quote Link to comment Share on other sites More sharing options...
unofix Posted July 12, 2021 Share Posted July 12, 2021 1 hour ago, DaveT70 said: No, the ratios are all wrong Well not quite, Reverse is OK 👍 1 1 Quote Link to comment Share on other sites More sharing options...
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